2017 |
Actes |
Boufares, A.; Provost, E.; Osswald, V.; Clain, P.; Delahaye, A.; Fournaison, L.; Dalmazzone, D. Détermination de la concentration du CO2 moléculaire en phase aqueuse par spectroscopie infrarouge : application à la cristallisation des hydrates de CO2 Inproceedings Dans: SFGP, Nancy, France, 11-13 juillet, 2017. BibTeX @inproceedings{clain2017d,
title = {Détermination de la concentration du CO2 moléculaire en phase aqueuse par spectroscopie infrarouge : application à la cristallisation des hydrates de CO2},
author = {Boufares, A. and Provost, E. and Osswald, V. and Clain, P. and Delahaye, A. and Fournaison, L. and Dalmazzone, D. },
year = {2017},
date = {2017-07-15},
booktitle = {SFGP, Nancy, France, 11-13 juillet},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Boufares, A.; Provost, E.; Osswald, V.; Clain, P.; Delahaye, A.; Fournaison, L.; Dalmazzone, D. Effect of additives on the kinetic study of CO2 hydrates during crystallization for secondary refrigeration applications using FTIR/ATR spectroscopy Inproceedings Dans: ICGH9, Denver, Colorado, USA, 25-30 juin, 2017. BibTeX @inproceedings{clain2017c,
title = {Effect of additives on the kinetic study of CO2 hydrates during crystallization for secondary refrigeration applications using FTIR/ATR spectroscopy},
author = {Boufares, A. and Provost, E. and Osswald, V. and Clain, P. and Delahaye, A. and Fournaison, L. and Dalmazzone, D. },
year = {2017},
date = {2017-06-14},
booktitle = {ICGH9, Denver, Colorado, USA, 25-30 juin},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Osswald, V.; Clain, P.; Boufares, A.; Dalmazzone, D.; Delahaye, A.; Fournaison, L. Impact of chemical additives on CO2 hydrate formation kinetics in a stirred tank reactor Inproceedings Dans: ICGH9, Denver, Colorado, USA, 25-30 juin, 2017. BibTeX @inproceedings{clain2017f,
title = {Impact of chemical additives on CO2 hydrate formation kinetics in a stirred tank reactor},
author = {Osswald, V. and Clain, P. and Boufares, A. and Dalmazzone, D. and Delahaye, A. and Fournaison, L. },
year = {2017},
date = {2017-06-14},
booktitle = {ICGH9, Denver, Colorado, USA, 25-30 juin},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Clain P.; Lesperance W.; Dufour T.; Osswald V.; Delahaye A.; Fournaison L. Heat and mass transfer modeling approach of Differential Thermal Analysis – Case study of CO2 hydrates formation Inproceedings Dans: 9 th International Conference of Gas Hydrates, Denver, Colorado, USA, 25-30 juin, 2017. BibTeX @inproceedings{clain2017e,
title = {Heat and mass transfer modeling approach of Differential Thermal Analysis – Case study of CO2 hydrates formation},
author = {Clain P. and Lesperance W. and Dufour T. and Osswald V. and Delahaye A. and Fournaison L. },
year = {2017},
date = {2017-06-14},
booktitle = {9 th International Conference of Gas Hydrates, Denver, Colorado, USA, 25-30 juin},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Guérard, G.; Nehai, Z Integration of the Blockchain in a Smart Grid Model Inproceedings Dans: CYSENI, Kaunas, Lithuania, 25-26 Mai., 2017. BibTeX @inproceedings{guerard2017i,
title = {Integration of the Blockchain in a Smart Grid Model},
author = {Guérard, G. and Nehai, Z},
year = {2017},
date = {2017-05-15},
booktitle = {CYSENI, Kaunas, Lithuania, 25-26 Mai.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Guérard, G.; Cathelineau, E.; Levy, L. From raw data to a digital model Inproceedings Dans: CYSENI, Kaunas, Lithuania, 25-26 Mai., 2017. BibTeX @inproceedings{guerard2017j,
title = {From raw data to a digital model},
author = {Guérard, G. and Cathelineau, E. and Levy, L. },
year = {2017},
date = {2017-05-15},
booktitle = {CYSENI, Kaunas, Lithuania, 25-26 Mai.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Pichon, B.; Clain,P and, Hoang, H.M and, Dufour, T.; Delahaye, A.; Fournaison, L. Review of Thermal Energy Storage technologies integration in Smart-Grid Inproceedings Dans: CYSENI, Kaunas, Lithuania, 25-26 mai, 2017. BibTeX @inproceedings{clain2017h,
title = {Review of Thermal Energy Storage technologies integration in Smart-Grid},
author = {Pichon, B. and Clain,P and, Hoang, H.M and, Dufour, T. and Delahaye, A. and Fournaison, L. },
year = {2017},
date = {2017-05-15},
booktitle = {CYSENI, Kaunas, Lithuania, 25-26 mai},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Salehy, Y.; Clain, P.; Boufares, A.; Osswald, V.; Delahaye, A.; Fournaison, L. Rheological study on CO2 hydrate slurries Inproceedings Dans: CYSENI, Kaunas, Lithuania, 25-26 mai, 2017. BibTeX @inproceedings{clain2017i,
title = {Rheological study on CO2 hydrate slurries},
author = {Salehy, Y. and Clain, P. and Boufares, A. and Osswald, V. and Delahaye, A. and Fournaison, L. },
year = {2017},
date = {2017-05-15},
booktitle = {CYSENI, Kaunas, Lithuania, 25-26 mai},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Salehy-Shablizi Y., Clain P., Boufarès A., Osswald V., Delahaye, A., Dalmazzone, D.; Fournaison, L. Rheological study on CO2 hydrate slurries for secondary refrigeration Inproceedings Dans: 14th International Conference of Young Scientists on Energy Issues, Kaunas, Lithuania, 2017. BibTeX @inproceedings{clain2017l,
title = {Rheological study on CO2 hydrate slurries for secondary refrigeration},
author = {Salehy-Shablizi Y., Clain P., Boufarès A., Osswald V., Delahaye, A., Dalmazzone, D. and Fournaison, L.},
year = {2017},
date = {2017-05-05},
booktitle = {14th International Conference of Young Scientists on Energy Issues, Kaunas, Lithuania},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Guérard, G.; Pichon, B.; Nehai, Z. Demand-Response: let the devices take our decisions Inproceedings Dans: SmartGreens 2017, Porto, Portugal, 22-24 avril, 2017. BibTeX @inproceedings{guerard2017h,
title = {Demand-Response: let the devices take our decisions},
author = {Guérard, G. and Pichon, B. and Nehai, Z. },
year = {2017},
date = {2017-04-01},
booktitle = {SmartGreens 2017, Porto, Portugal, 22-24 avril},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Tristan Fautrel; Laurent George; Frédéric Fauberteau A hypervisor schedulability analysis for safety and security critical applications scheduled in arbitrary patterns of slots Inproceedings Dans: Proceeding of the 11th Junior Researcher Workshop on Real-Time Computing (JRWRTC), 2017. Résumé | BibTeX @inproceedings{Fautrel2017,
title = {A hypervisor schedulability analysis for safety and security critical applications scheduled in arbitrary patterns of slots},
author = {Tristan Fautrel and Laurent George and Frédéric Fauberteau},
year = {2017},
date = {2017-00-00},
booktitle = {Proceeding of the 11th Junior Researcher Workshop on Real-Time Computing (JRWRTC)},
abstract = {This paper focuses on the problem of scheduling several applications on top of a hypervisor. The hypervisor is in charge of satisfying safety and security constraints enforced by space and temporal isolation. An application is run by one processor of a multiprocessor platform in dedicated slots composing a pattern. One processor can run several applications each assigned to a dedicated pattern of slots. A hypervisor distributes the time resource among several Virtual Machines (VMs) on a multiprocessor architecture. Each VM embeds an application consisting of a set of sporadic real-time tasks. These tasks are scheduled according to a preemptive Fixed-Task-Priority (FTP) policy in the slots assigned to their application. A task can be executed by one or several slots and a slot can execute several tasks. First, we derive an exact schedulability condition using response time analysis for sporadic tasks scheduled in a periodic arbitrary pattern of slots. Then, we investigate several pattern constructions derived from the scheduling of tasks with classical schedulings like Round Robin (RR), Weighted Fair Queuing (WFQ), Rate Monotonic (RM) and Earliest Deadline First (EDF). Finally, we compare by simulation the success ratios of several constructions of slot patterns.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper focuses on the problem of scheduling several applications on top of a hypervisor. The hypervisor is in charge of satisfying safety and security constraints enforced by space and temporal isolation. An application is run by one processor of a multiprocessor platform in dedicated slots composing a pattern. One processor can run several applications each assigned to a dedicated pattern of slots. A hypervisor distributes the time resource among several Virtual Machines (VMs) on a multiprocessor architecture. Each VM embeds an application consisting of a set of sporadic real-time tasks. These tasks are scheduled according to a preemptive Fixed-Task-Priority (FTP) policy in the slots assigned to their application. A task can be executed by one or several slots and a slot can execute several tasks. First, we derive an exact schedulability condition using response time analysis for sporadic tasks scheduled in a periodic arbitrary pattern of slots. Then, we investigate several pattern constructions derived from the scheduling of tasks with classical schedulings like Round Robin (RR), Weighted Fair Queuing (WFQ), Rate Monotonic (RM) and Earliest Deadline First (EDF). Finally, we compare by simulation the success ratios of several constructions of slot patterns. |
En ligne |
Achraf Kallel L'impression 3D : Mythes et Réalités En ligne 2017. BibTeX @online{Kallel2017c,
title = {L'impression 3D : Mythes et Réalités },
author = {Achraf Kallel},
year = {2017},
date = {2017-12-30},
journal = {CAD Magazine, mai/Juin},
keywords = {},
pubstate = {published},
tppubtype = {online}
}
|
Achraf Kallel Digitalisation, autonomie, développement durable : l'horizon du secteur automobile ne cesse de s'élargir et de proposer de nouvelles carrières passionnantes En ligne 2017. BibTeX @online{Kallel2017a,
title = {Digitalisation, autonomie, développement durable : l'horizon du secteur automobile ne cesse de s'élargir et de proposer de nouvelles carrières passionnantes },
author = {Achraf Kallel},
year = {2017},
date = {2017-03-15},
journal = {Le Parisien ECO, mars },
keywords = {},
pubstate = {published},
tppubtype = {online}
}
|
2016 |
Articles de journaux |
Jérémy Oignet; Anthony Delahaye; Jean-Philippe Torré; Christophe Dicharry; Hong Minh Hoang; Pascal Clain; Véronique Osswald; Ziad Youssef; Laurence Fournaison Rheological study of CO2 hydrate slurry in the presence of Sodium Dodecyl Sulfate in a secondary refrigeration loop Article de journal Dans: Chemical Engineering Science, 158 , p. 294 - 303, 2016. Résumé | Liens | BibTeX @article{Oignet2017294,
title = {Rheological study of CO2 hydrate slurry in the presence of Sodium Dodecyl Sulfate in a secondary refrigeration loop},
author = {Jérémy Oignet and Anthony Delahaye and Jean-Philippe Torré and Christophe Dicharry and Hong Minh Hoang and Pascal Clain and Véronique Osswald and Ziad Youssef and Laurence Fournaison},
url = {http://www.sciencedirect.com/science/article/pii/S0009250916305486},
doi = {http://dx.doi.org/10.1016/j.ces.2016.10.018},
year = {2016},
date = {2016-12-13},
journal = {Chemical Engineering Science},
volume = {158},
pages = {294 - 303},
abstract = {Abstract Secondary refrigeration and thermal energy storage are promising solutions to enhance the performance of refrigeration systems and reduce the impact of refrigerants on the environment. To improve the energy efficiency of secondary refrigeration loops, phase change material (PCM) slurries with a high energy density, such as CO2 hydrate slurries, can be used as a secondary refrigerant. In addition, hydrate-based processes could be an innovative option to capture CO2 from flue gas. In both applications, the rheological properties of the CO2 hydrate slurry have to be controlled. In the present study, CO2 hydrate slurry in the presence of Sodium Dodecyl Sulfate (SDS) was studied in a dynamic flow loop. The results show that SDS used at concentrations of 1500–2000 ppm significantly decreases agglomeration and improves the flow properties of the slurry. Moreover, SDS helps decrease the viscosity of the CO2-hydrate slurry at high fraction (>10 vol%) and therefore could be suitable for use in industrial applications such as secondary refrigeration, in which hydrate slurries must be easy to handle.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract Secondary refrigeration and thermal energy storage are promising solutions to enhance the performance of refrigeration systems and reduce the impact of refrigerants on the environment. To improve the energy efficiency of secondary refrigeration loops, phase change material (PCM) slurries with a high energy density, such as CO2 hydrate slurries, can be used as a secondary refrigerant. In addition, hydrate-based processes could be an innovative option to capture CO2 from flue gas. In both applications, the rheological properties of the CO2 hydrate slurry have to be controlled. In the present study, CO2 hydrate slurry in the presence of Sodium Dodecyl Sulfate (SDS) was studied in a dynamic flow loop. The results show that SDS used at concentrations of 1500–2000 ppm significantly decreases agglomeration and improves the flow properties of the slurry. Moreover, SDS helps decrease the viscosity of the CO2-hydrate slurry at high fraction (>10 vol%) and therefore could be suitable for use in industrial applications such as secondary refrigeration, in which hydrate slurries must be easy to handle. |
Kamel Hamdache et Youcef Amirat Steady state solutions of ferrofluid flow models Article de journal Dans: Communications of Pure and Applied Analysis, 15 (6), p. 2329-2356, 2016. Résumé | Liens | BibTeX @article{Hamdache2016e,
title = {Steady state solutions of ferrofluid flow models},
author = {Kamel Hamdache et Youcef Amirat},
editor = {Americain Institut of Mathematical Sciences},
doi = {doi: 10.3934/cpaa.2016039},
year = {2016},
date = {2016-11-01},
journal = {Communications of Pure and Applied Analysis},
volume = {15},
number = {6},
pages = {2329-2356},
abstract = {We study two models of differential equations for the stationary flow of an incompressible viscous magnetic fluid subjected to an external magnetic field. The first model, called Rosensweig's model, consists of the incompressible Navier-Stokes equations, the angular momentum equation, the magnetization equation of Bloch-Torrey type, and the magnetostatic equations. The second one, called Shliomis model, is obtained by assuming that the angular momentum is given in terms of the magnetic field, the magnetization field and the vorticity. It consists of the incompressible Navier-Stokes equation, the magnetization equation and the magnetostatic equations. We prove, for each of the differential systems posed in a bounded domain of R3 and equipped with boundary conditions, existence of weak solutions by using regularization techniques, linearization and the Schauder fixed point theorem.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We study two models of differential equations for the stationary flow of an incompressible viscous magnetic fluid subjected to an external magnetic field. The first model, called Rosensweig's model, consists of the incompressible Navier-Stokes equations, the angular momentum equation, the magnetization equation of Bloch-Torrey type, and the magnetostatic equations. The second one, called Shliomis model, is obtained by assuming that the angular momentum is given in terms of the magnetic field, the magnetization field and the vorticity. It consists of the incompressible Navier-Stokes equation, the magnetization equation and the magnetostatic equations. We prove, for each of the differential systems posed in a bounded domain of R3 and equipped with boundary conditions, existence of weak solutions by using regularization techniques, linearization and the Schauder fixed point theorem. |
Guérard, Guillaume Demain, tous producteurs d'électricité ? Article de journal Dans: The conversation, on line, 2016. BibTeX @article{Guerard1,
title = {Demain, tous producteurs d'électricité ? },
author = {Guérard, Guillaume},
year = {2016},
date = {2016-09-14},
journal = {The conversation, on line},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Guérard, Guillaume Par quoi passe l'efficacité énergétique ? Article de journal Dans: The conversation, on line, 2016. BibTeX @article{Guerard2,
title = {Par quoi passe l'efficacité énergétique ? },
author = {Guérard, Guillaume},
year = {2016},
date = {2016-06-17},
journal = {The conversation, on line},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Olivier Hubert; Frédérick Mballa-Mballa; Song He; Sophie Depeyre Influence of Biaxial Stress on Magnetic Behavior of Dual-Phase Steel --- Experiments and Modeling Article de journal Dans: IEEE Transactions on Magnetics, 52 (5), 2016, ISSN: 0018-9464 . Résumé | Liens | BibTeX @article{IEEE2016,
title = {Influence of Biaxial Stress on Magnetic Behavior of Dual-Phase Steel --- Experiments and Modeling},
author = {Olivier Hubert and Frédérick Mballa-Mballa and Song He and Sophie Depeyre},
doi = {10.1109/TMAG.2015.2511169 },
issn = {0018-9464 },
year = {2016},
date = {2016-01-05},
journal = {IEEE Transactions on Magnetics},
volume = {52},
number = {5},
abstract = {Online magnetic NDE of dual-phase (DP) steels is made on bands submitted to high multiaxial stress. Extraction of microstructural information from the measurement requires separating the effect of stress and microstructure. Coupled magnetomechanical micromagnetic modeling is relevant for that purpose. In this paper, the magnetic behavior of a DP steel under biaxial stress is carried out and compared with the modeling. It is shown that the discrepancies observed between experiments and model can be explained by the 2-D assumption. },
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Online magnetic NDE of dual-phase (DP) steels is made on bands submitted to high multiaxial stress. Extraction of microstructural information from the measurement requires separating the effect of stress and microstructure. Coupled magnetomechanical micromagnetic modeling is relevant for that purpose. In this paper, the magnetic behavior of a DP steel under biaxial stress is carried out and compared with the modeling. It is shown that the discrepancies observed between experiments and model can be explained by the 2-D assumption. |
Kamel Hamdache; Djamila Hamroun Global existence and long time behavior of solutions to a model of ferroelectric materials Article de journal Dans: Journal of Mathematical Analysis and Applications., 438 , p. 668-700, 2016. Liens | BibTeX @article{Hamdache2016,
title = {Global existence and long time behavior of solutions to a model of ferroelectric materials},
author = {Kamel Hamdache and Djamila Hamroun},
editor = {Elsevier},
doi = {10.1016/j.jmaa.2016.01.074},
year = {2016},
date = {2016-01-01},
journal = {Journal of Mathematical Analysis and Applications.},
volume = {438},
pages = {668-700},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Tognevi Amen; Guerich Mohamed; Yvonnet Julien A multi-scale modeling method for heterogeneous structures without scale separation using a filter-based homogenization scheme Article de journal Dans: International Journal for Numerical Methods in Engineering, p. n/a–n/a, 2016, ISSN: 1097-0207. Résumé | Liens | BibTeX @article{NME:NME5200,
title = {A multi-scale modeling method for heterogeneous structures without scale separation using a filter-based homogenization scheme},
author = {Tognevi Amen and Guerich Mohamed and Yvonnet Julien},
url = {http://dx.doi.org/10.1002/nme.5200},
doi = {10.1002/nme.5200},
issn = {1097-0207},
year = {2016},
date = {2016-01-01},
journal = {International Journal for Numerical Methods in Engineering},
pages = {n/a--n/a},
abstract = {A method is proposed to compute the response of highly heterogeneous structures by constructing homogenized models when no scale separation can be assumed. The technique is based on an extended homogenization scheme where the averaging operators are replaced by linear filters to cut off fine scale fluctuations, while maintaining locally varying mechanical fields with larger wavelength. As a result, the constitutive law at an intermediate scale, called mesoscale, arises to be naturally nonlocal by construction, where the kernel operator is fully constructed by computations on the unit cell associated with the microstructure. A displacement-based numerical strategy is developed to implement the technique in a classical finite element framework and does not require higher-order elements. The methodology is applied to construct simplified models of heterogeneous structures subjected to loads, which have a characteristic wavelength comparable with the dimensions of the heterogeneities or in presence of strong strain localization as in cracked heterogeneous structures. Copyright © 2016 John Wiley & Sons, Ltd.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A method is proposed to compute the response of highly heterogeneous structures by constructing homogenized models when no scale separation can be assumed. The technique is based on an extended homogenization scheme where the averaging operators are replaced by linear filters to cut off fine scale fluctuations, while maintaining locally varying mechanical fields with larger wavelength. As a result, the constitutive law at an intermediate scale, called mesoscale, arises to be naturally nonlocal by construction, where the kernel operator is fully constructed by computations on the unit cell associated with the microstructure. A displacement-based numerical strategy is developed to implement the technique in a classical finite element framework and does not require higher-order elements. The methodology is applied to construct simplified models of heterogeneous structures subjected to loads, which have a characteristic wavelength comparable with the dimensions of the heterogeneities or in presence of strong strain localization as in cracked heterogeneous structures. Copyright © 2016 John Wiley & Sons, Ltd. |
Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet Determining the Size of RVE for Nonlinear Random Composites in an Incremental Computational Homogenization Framework Article de journal Dans: Journal of Engineering Mechanics, 142 (5), p. 04016018, 2016. Liens | BibTeX @article{doi:10.1061/(ASCE)EM.1943-7889.0001057,
title = {Determining the Size of RVE for Nonlinear Random Composites in an Incremental Computational Homogenization Framework},
author = {Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},
url = {http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0001057},
doi = {10.1061/(ASCE)EM.1943-7889.0001057},
year = {2016},
date = {2016-01-01},
journal = {Journal of Engineering Mechanics},
volume = {142},
number = {5},
pages = {04016018},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Conférences |
Achraf Kallel, Menad Lamraoui, Joseph Fitoussi AND Abbas Tcharkhtchi The residual stress effect on the Shape Memory Polymers Conférence ICRS-10, 2016. Résumé | BibTeX @conference{ICRS-10,
title = {The residual stress effect on the Shape Memory Polymers },
author = {Achraf Kallel, Menad Lamraoui, Joseph Fitoussi AND Abbas Tcharkhtchi},
editor = {10 th International Conference on Residual Stresses, Sydney, Australia},
year = {2016},
date = {2016-07-01},
booktitle = {ICRS-10},
abstract = {The current paper presents an experimental study of the residual stress role to recover polymer blend to its original position after deformation. A mixture of 40% PolyCaproLactone (PCL) and 60% Styrene-Butadiene-Styrene (SBS) is used for our study. The Shape Memory Polymer (SMP) is able to storing a permanent macroscopic after passing through a temporary one; then under an external stimulus; they can recover their initial shapes. The recovery rate depends not only on the mechanical property of the mixture, but also the number of the loading cycles. Indeed, one multiplying the number of mechanical loading cycle; generally tensile test; the recovery rate does not change in a linear manner and therefore the residual stress is not added in integer from one cycle to another.
In this work we studied the mechanism of the shape as well as properties memory effect of the blend under study during a shape memory cycle, to establish a relationship between the “shape memory effect” and the “properties memory effect”. Finally, we measure the “Driving Force” responsible for the shape memory effect by an original method. This study allows establishing a relationship between the rate of recovery and residual stresses introduced into the polymer during its deformation.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The current paper presents an experimental study of the residual stress role to recover polymer blend to its original position after deformation. A mixture of 40% PolyCaproLactone (PCL) and 60% Styrene-Butadiene-Styrene (SBS) is used for our study. The Shape Memory Polymer (SMP) is able to storing a permanent macroscopic after passing through a temporary one; then under an external stimulus; they can recover their initial shapes. The recovery rate depends not only on the mechanical property of the mixture, but also the number of the loading cycles. Indeed, one multiplying the number of mechanical loading cycle; generally tensile test; the recovery rate does not change in a linear manner and therefore the residual stress is not added in integer from one cycle to another.
In this work we studied the mechanism of the shape as well as properties memory effect of the blend under study during a shape memory cycle, to establish a relationship between the “shape memory effect” and the “properties memory effect”. Finally, we measure the “Driving Force” responsible for the shape memory effect by an original method. This study allows establishing a relationship between the rate of recovery and residual stresses introduced into the polymer during its deformation.
|
Kamel Hamdache; A. Gaudellio Ferroelectric thin structures. Conférence New Trends in Differential Equations, Control Theory and Optimisation. Edt. V. Barbu, C. Lefter, I. Vrabie. World Scientific , World Scientific, 2016. Résumé | BibTeX @conference{HamdacheGauconf2016,
title = {Ferroelectric thin structures.},
author = {Kamel Hamdache and A. Gaudellio},
year = {2016},
date = {2016-03-09},
booktitle = {New Trends in Differential Equations, Control Theory and Optimisation. Edt. V. Barbu, C. Lefter, I. Vrabie. World Scientific },
pages = {121-127},
publisher = {World Scientific},
abstract = {In this note we summarize some results obtainee in (19) and in (20), where starting from a non-convex and nonlocal 3D-variational model for the electric polarization in a ferroelectric material, via an asymptotic process we obtain 2D-variational models for a thin film and 1D-variational models for a thin wire, respectively.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
In this note we summarize some results obtainee in (19) and in (20), where starting from a non-convex and nonlocal 3D-variational model for the electric polarization in a ferroelectric material, via an asymptotic process we obtain 2D-variational models for a thin film and 1D-variational models for a thin wire, respectively. |
Actes |
Hoang T.H.; Guerich M.; Yvonnet J. A Numerical Incremental Homogenization Approach to Calculate Elastoplastic Heterogeneous Structures Inproceedings Dans: European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), Crète, 2016. BibTeX @inproceedings{Guerichconf2016,
title = {A Numerical Incremental Homogenization Approach to Calculate Elastoplastic Heterogeneous Structures},
author = {Hoang T.H. and Guerich M. and Yvonnet J. },
year = {2016},
date = {2016-06-06},
booktitle = {European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), Crète},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Tognevi A.; Guerich M.; Yvonnet J. A multi-scale modeling method for heterogeneous structures without scale separation using a filterbased homogenization scheme Inproceedings Dans: European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), June 5-10, 2016, Crète, Grèce., 2016. BibTeX @inproceedings{Guerichconf22016,
title = {A multi-scale modeling method for heterogeneous structures without scale separation using a filterbased homogenization scheme},
author = {Tognevi A. and Guerich M. and Yvonnet J. },
year = {2016},
date = {2016-06-06},
booktitle = {European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), June 5-10, 2016, Crète, Grèce.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Workshops |
Kamel Hamdache; Djamila Hamroun; Fatah Aggoune Transfert de chaleur dans un fluide magnétique avec la loi de Maxwell-Cattaneo non linéaire.Équations aux dérivées partielles et leurs applications. Workshop FNM Fédération Normandie Mathématiques Actes du colloque Edp-Normandie Le Havre 2015, Le Havre, 2016. BibTeX @workshop{Hamdache2016b,
title = {Transfert de chaleur dans un fluide magnétique avec la loi de Maxwell-Cattaneo non linéaire.Équations aux dérivées partielles et leurs applications.},
author = {Kamel Hamdache and Djamila Hamroun and Fatah Aggoune},
year = {2016},
date = {2016-01-01},
publisher = {Actes du colloque Edp-Normandie Le Havre 2015},
address = {Le Havre},
organization = {FNM Fédération Normandie Mathématiques},
keywords = {},
pubstate = {published},
tppubtype = {workshop}
}
|
2015 |
Articles de journaux |
Pascal Clain; Fatou-Toutie Ndoye; Anthony Delahaye; Laurence Fournaison; Wei Lin; Didier Dalmazzone Particle size distribution of TBPB hydrates by focused beam reflectance measurement (FBRM) for secondary refrigeration application Article de journal Dans: International Journal of Refrigeration, 50 , p. 19-31, 2015. Résumé | Liens | BibTeX @article{CNDFLD14,
title = {Particle size distribution of TBPB hydrates by focused beam reflectance measurement (FBRM) for secondary refrigeration application},
author = { Pascal Clain and Fatou-Toutie Ndoye and Anthony Delahaye and Laurence Fournaison and Wei Lin and Didier Dalmazzone},
url = {http://labs.esilv.fr/publications/public/2014/CNDFLD14},
year = {2015},
date = {2015-01-01},
journal = {International Journal of Refrigeration},
volume = {50},
pages = {19-31},
abstract = {The present work investigates TBPB(tetra-n-butylphosphonium bromide) hydrate slurries based on focused beam reflectance measurement (FBRM) method. Hydrates can be used as phase change materials (PCM) for thermal energy storage due to their high latent heat of melting. In this study, hydrates were formed from TBPB-water mixtures, suitable for air-conditioning applications. Moreover, hydrate slurries, composed of hydrate-particles dispersed in liquid, are appropriate solutions for cold distribution. Nevertheless, flow properties of hydrate slurries, depending on hydrate crystallization kinetics, must be controlled. In this work, FBRM was used for analysing TBPB-hydrate-particle size distribution. This work showed that FBRM can detect system phase changes (nucleation, growth, agglomeration). In addition, a bimodal distribution of particles was observed. This work could be useful to understand rheological behaviour of hydrate slurry, not only for secondary refrigeration applications, but also for natural gas hydrate transportation, pipeline plugging prevention, and gas capture.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The present work investigates TBPB(tetra-n-butylphosphonium bromide) hydrate slurries based on focused beam reflectance measurement (FBRM) method. Hydrates can be used as phase change materials (PCM) for thermal energy storage due to their high latent heat of melting. In this study, hydrates were formed from TBPB-water mixtures, suitable for air-conditioning applications. Moreover, hydrate slurries, composed of hydrate-particles dispersed in liquid, are appropriate solutions for cold distribution. Nevertheless, flow properties of hydrate slurries, depending on hydrate crystallization kinetics, must be controlled. In this work, FBRM was used for analysing TBPB-hydrate-particle size distribution. This work showed that FBRM can detect system phase changes (nucleation, growth, agglomeration). In addition, a bimodal distribution of particles was observed. This work could be useful to understand rheological behaviour of hydrate slurry, not only for secondary refrigeration applications, but also for natural gas hydrate transportation, pipeline plugging prevention, and gas capture. |
Radoin Belaouar; Anne de Bouard; Arnaud Debussche Numerical analysis of the nonlinear Schrödinger equation with white noise dispersion Article de journal Dans: Stochastic Partial Differential Equations: Analysis and Computations, 3 (1), p. 103-132, 2015, ISSN: 2194-0401. Résumé | Liens | BibTeX @article{rad,
title = {Numerical analysis of the nonlinear Schrödinger equation with white noise dispersion},
author = { Radoin Belaouar and Anne de Bouard and Arnaud Debussche},
url = {http://dx.doi.org/10.1007/s40072-015-0044-z},
doi = {10.1007/s40072-015-0044-z},
issn = {2194-0401},
year = {2015},
date = {2015-01-01},
journal = {Stochastic Partial Differential Equations: Analysis and Computations},
volume = {3},
number = {1},
pages = {103-132},
publisher = {Springer US},
abstract = {This article is devoted to the numerical study of a nonlinear Schrödinger equation in which the coefficient in front of the group velocity dispersion is multiplied by a real valued Gaussian white noise. We first perform the numerical analysis of a semi-discrete Crank-Nicolson scheme in the case when the continuous equation possesses a unique global solution. We prove that the strong order of convergence in probability is equal to one in this case. In a second step, we numerically investigate, in space dimension one, the behavior of the solutions of the equation for different power nonlinearities, corresponding to subcritical, critical or supercritical nonlinearities in the deterministic case. Numerical evidence of a change in the critical power due to the presence of the noise is pointed out.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This article is devoted to the numerical study of a nonlinear Schrödinger equation in which the coefficient in front of the group velocity dispersion is multiplied by a real valued Gaussian white noise. We first perform the numerical analysis of a semi-discrete Crank-Nicolson scheme in the case when the continuous equation possesses a unique global solution. We prove that the strong order of convergence in probability is equal to one in this case. In a second step, we numerically investigate, in space dimension one, the behavior of the solutions of the equation for different power nonlinearities, corresponding to subcritical, critical or supercritical nonlinearities in the deterministic case. Numerical evidence of a change in the critical power due to the presence of the noise is pointed out. |
Antonio Gaudiello; Kamel Hamdache A reduced model for the polarization in a ferroelectric thin wire Article de journal Dans: Nonlinear Differential Equations and Applications (NoDEA ), 22 (6), p. 1883-1896, 2015. Résumé | Liens | BibTeX @article{Hamdache65,
title = {A reduced model for the polarization in a ferroelectric thin wire},
author = {Antonio Gaudiello and Kamel Hamdache },
editor = {Springer Basel},
doi = {DOI 10.1007/s00030-015-0348-8},
year = {2015},
date = {2015-01-01},
journal = {Nonlinear Differential Equations and Applications (NoDEA )},
volume = {22},
number = {6},
pages = {1883-1896},
abstract = {In this paper, starting from a non-convex and nonlocal 3D-variational model for the electric polarization in a ferroelectric material, via an asymptotic process we obtain a rigorous 1D-variational model for a thin wire.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper, starting from a non-convex and nonlocal 3D-variational model for the electric polarization in a ferroelectric material, via an asymptotic process we obtain a rigorous 1D-variational model for a thin wire. |
Conférences |
Bassem Benlazreg; Achraf Kallel; Alexis Massol Optimized design for 3D printing Conférence The 8th European Altair Technology Conference, ATC2015, October1, Paris, France, 2015. BibTeX @conference{ATC2015,
title = {Optimized design for 3D printing},
author = {Bassem Benlazreg and Achraf Kallel and Alexis Massol},
year = {2015},
date = {2015-10-01},
booktitle = {The 8th European Altair Technology Conference, ATC2015, October1, Paris, France},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
|
Actes |
Jérémy Oignet; Anthony Delahaye; Thomas Dufour; Hong-Minh Hoang; Pascal Clain; Laurence Fournaison Energy study of CO2 hydrate slurries formation in a tank reactor Inproceedings Dans: 24rd IIR International Congress of Refrigeration (ICR 2015), Aug 16-22 Yokohama, Japan, 2015. BibTeX @inproceedings{Oignet2015,
title = {Energy study of CO2 hydrate slurries formation in a tank reactor},
author = {Jérémy Oignet and Anthony Delahaye and Thomas Dufour and Hong-Minh Hoang and Pascal Clain and Laurence Fournaison},
year = {2015},
date = {2015-08-16},
booktitle = {24rd IIR International Congress of Refrigeration (ICR 2015)},
address = {Yokohama, Japan},
organization = {Aug 16-22},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Pascal Clain; Véronique Osswald; Olivier Spiga; Anthony Delahaye; Laurence Fournaison A new formation kinetics study method of TBPB and CO2 hydrates based on DTA Inproceedings Dans: 24rd IIR International Congress of Refrigeration (ICR 2015), Aug 16-22 Yokohama, Japan, 2015. BibTeX @inproceedings{Clain2015,
title = {A new formation kinetics study method of TBPB and CO2 hydrates based on DTA},
author = {Pascal Clain and Véronique Osswald and Olivier Spiga and Anthony Delahaye and Laurence Fournaison},
year = {2015},
date = {2015-08-16},
booktitle = {24rd IIR International Congress of Refrigeration (ICR 2015)},
address = {Yokohama, Japan},
organization = {Aug 16-22},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet Effective size of RVE for finite element analysis of structures made of nonlinear random composites Inproceedings Dans: 18th International Conference on Composite Structures (ICCS18), Lisbonne, Portugal, 2015. Résumé | Liens | BibTeX @inproceedings{hoang:hal-01166513,
title = {Effective size of RVE for finite element analysis of structures made of nonlinear random composites},
author = { Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},
url = {https://hal-upec-upem.archives-ouvertes.fr/hal-01166513},
year = {2015},
date = {2015-06-01},
booktitle = {18th International Conference on Composite Structures (ICCS18)},
address = {Lisbonne, Portugal},
abstract = {In the present work, we propose to determine the size of a representative volume element (RVE) in the case of nonlinear random composites with either elastoplastic or elasto viscoplastic phases. In such a case, the general form of the effective constitutive behavior is not known in advance and the response must be evaluated either by direct numerical computations on the RVE, either by an appropriate approximation scheme. Previous methodologies [1,2] for determining the size of RVE usually rely on analyzing the convergence of the RVE response computed numerically with respect to its size. In the present work, we analyze the convergence of parameters related to an incremental homogenization scheme, with respect to (i) the size of the RVE and (ii) to statistical convergence related to microstructure realizations. For that purpose, we combine an incremental homogenization method [3] with a statistical convergence analysis of parameters related to the matrix phase only. The advantage is that the range of parameters to be identified is much narrower than for a general empirical constitutive law. Once identified and the convergence analysis performed with respect to both size of RVE and statistical realizations, the macroscopic constitutive law can be readily used for structure calculations. We illustrate the methodology by analyzing two-dimensional microstructures with randomly distributed cylindrical elastic rigid fibers, embedded in a elastoplastic or elasto-viscoplastic matrix. For these materials, the existence of an RVE is demonstrated for sizes of RVE corresponding to 17 − 18 and 14 − 15 times the diameter of the inclusions, respectively.
Effective size of RVE for finite element analysis of structures made of nonlinear random composites - ResearchGate. Available from: http://www.researchgate.net/publication/279488878_Effective_size_of_RVE_for_finite_element_analysis_of_structures_made_of_nonlinear_random_composites [accessed Jul 24, 2015].},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
In the present work, we propose to determine the size of a representative volume element (RVE) in the case of nonlinear random composites with either elastoplastic or elasto viscoplastic phases. In such a case, the general form of the effective constitutive behavior is not known in advance and the response must be evaluated either by direct numerical computations on the RVE, either by an appropriate approximation scheme. Previous methodologies [1,2] for determining the size of RVE usually rely on analyzing the convergence of the RVE response computed numerically with respect to its size. In the present work, we analyze the convergence of parameters related to an incremental homogenization scheme, with respect to (i) the size of the RVE and (ii) to statistical convergence related to microstructure realizations. For that purpose, we combine an incremental homogenization method [3] with a statistical convergence analysis of parameters related to the matrix phase only. The advantage is that the range of parameters to be identified is much narrower than for a general empirical constitutive law. Once identified and the convergence analysis performed with respect to both size of RVE and statistical realizations, the macroscopic constitutive law can be readily used for structure calculations. We illustrate the methodology by analyzing two-dimensional microstructures with randomly distributed cylindrical elastic rigid fibers, embedded in a elastoplastic or elasto-viscoplastic matrix. For these materials, the existence of an RVE is demonstrated for sizes of RVE corresponding to 17 − 18 and 14 − 15 times the diameter of the inclusions, respectively.
Effective size of RVE for finite element analysis of structures made of nonlinear random composites - ResearchGate. Available from: http://www.researchgate.net/publication/279488878_Effective_size_of_RVE_for_finite_element_analysis_of_structures_made_of_nonlinear_random_composites [accessed Jul 24, 2015]. |
Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet An incremental multilevel computational homogenization method for elastoplastic composites Inproceedings Dans: 18th International Conference on Composite Structures (ICCS18), Lisbonne, Portugal, 2015. Résumé | Liens | BibTeX @inproceedings{hoang:hal-01166485,
title = {An incremental multilevel computational homogenization method for elastoplastic composites},
author = {Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},
url = {https://hal-upec-upem.archives-ouvertes.fr/hal-01166485},
year = {2015},
date = {2015-06-01},
booktitle = {18th International Conference on Composite Structures (ICCS18)},
address = {Lisbonne, Portugal},
abstract = {In the present work, a multilevel computational homogenization method is proposed for solving
structure problems made of elastoplastic phases. To reduce computations costs of classical multi-
level finite element methods [2], we use an incremental framework, initiated in Hill citehill1965
and developed for semi-analytical method e.g. in [1]. In semi-analytical approaches, the approx-
imation of the Mori-Tanaka scheme induces limitations in accuracy for some configurations like
strongly anisotropic microstructures and does not allow capturing effective smooth hardening in-
duced by the different elastoplastic phases. In the proposed method, we use the incremental ap-
proach by computing directly the effective macroscopic tensor related to the linearized problem
numerically by Finite Elements on an RVE. The method is validated through an example of ho-
mogenization of a composite microstructure with elastic rigid fibers, embedded in an elastoplastic
matrix. The results showed that the method is more accurate than semi-anlytical methods and is
less computationally demanding than FE2. An incremental multilevel computational homogenization method for elastoplastic composites - },
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
In the present work, a multilevel computational homogenization method is proposed for solving
structure problems made of elastoplastic phases. To reduce computations costs of classical multi-
level finite element methods [2], we use an incremental framework, initiated in Hill citehill1965
and developed for semi-analytical method e.g. in [1]. In semi-analytical approaches, the approx-
imation of the Mori-Tanaka scheme induces limitations in accuracy for some configurations like
strongly anisotropic microstructures and does not allow capturing effective smooth hardening in-
duced by the different elastoplastic phases. In the proposed method, we use the incremental ap-
proach by computing directly the effective macroscopic tensor related to the linearized problem
numerically by Finite Elements on an RVE. The method is validated through an example of ho-
mogenization of a composite microstructure with elastic rigid fibers, embedded in an elastoplastic
matrix. The results showed that the method is more accurate than semi-anlytical methods and is
less computationally demanding than FE2. An incremental multilevel computational homogenization method for elastoplastic composites - |
Julien Yvonnet; A. Tognevi; Guy Bonnet; M. Guerich A filter-based computational homogenization method for handling non-separated scales problems Inproceedings Dans: 12e Colloque National en Calcul des Structures, Presqu’^ile de Giens, France, 2015. Liens | BibTeX @inproceedings{yvonnet:hal-01166483b,
title = {A filter-based computational homogenization method for handling non-separated scales problems},
author = { Julien Yvonnet and A. Tognevi and Guy Bonnet and M. Guerich},
url = {https://hal-upec-upem.archives-ouvertes.fr/hal-01166483},
year = {2015},
date = {2015-01-01},
booktitle = {12e Colloque National en Calcul des Structures},
address = {Presqu’^ile de Giens, France},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Julien Yvonnet; Guy Bonnet; A. Tognevi; M. Guerich Filter-based computational homogenization Inproceedings Dans: 1st Pan-American congress on computational mechanics, Buenos Aires, Argentina, 2015, (Conf'erence invit'ee). Liens | BibTeX @inproceedings{yvonnet:hal-01147886,
title = {Filter-based computational homogenization},
author = { Julien Yvonnet and Guy Bonnet and A. Tognevi and M. Guerich},
url = {https://hal-upec-upem.archives-ouvertes.fr/hal-01147886},
year = {2015},
date = {2015-01-01},
booktitle = {1st Pan-American congress on computational mechanics},
address = {Buenos Aires, Argentina},
note = {Conf'erence invit'ee},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Julien Yvonnet; A. Tognevi; Guy Bonnet; M. Guerich A filter-based computational homogenization method for handling non-separated scales problems Inproceedings Dans: 12e Colloque National en Calcul des Structures, Presqu’^ile de Giens, France, 2015. Liens | BibTeX @inproceedings{yvonnet:hal-01166483,
title = {A filter-based computational homogenization method for handling non-separated scales problems},
author = { Julien Yvonnet and A. Tognevi and Guy Bonnet and M. Guerich},
url = {https://hal-upec-upem.archives-ouvertes.fr/hal-01166483},
year = {2015},
date = {2015-01-01},
booktitle = {12e Colloque National en Calcul des Structures},
address = {Presqu’^ile de Giens, France},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2014 |
Articles de journaux |
Cédric Adam; Salim Bouabdallah; Malek Zarroug; Habibou Maitournam Improved Numerical Integration for Locking Treatment in Isogeometric Structural Elements. Part I: Beams Article de journal Dans: Computer Methods in Applied Mechanics & Engineering, 279 , p. 1-28, 2014. BibTeX @article{Bouabdallah2014c,
title = {Improved Numerical Integration for Locking Treatment in Isogeometric Structural Elements. Part I: Beams},
author = { Cédric Adam and Salim Bouabdallah and Malek Zarroug and Habibou Maitournam},
year = {2014},
date = {2014-09-01},
journal = {Computer Methods in Applied Mechanics & Engineering},
volume = {279},
pages = {1-28},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Wei Lin; Pascal Clain; Didier Dalmazzone; Walter Fürst; Anthony Delahaye; Laurence Fournaison Thermodynamic properties of semiclathrate hydrates formed from the TBAB+TBPB+water and CO2+TBAB+TBPB+water systems Article de journal Dans: Fluid Phase Equilibria, 372 , p. 63–68, 2014. Résumé | Liens | BibTeX @article{LCDFDF14,
title = {Thermodynamic properties of semiclathrate hydrates formed from the TBAB+TBPB+water and CO2+TBAB+TBPB+water systems},
author = { Wei Lin and Pascal Clain and Didier Dalmazzone and Walter Fürst and Anthony Delahaye and Laurence Fournaison},
url = {http://labs.esilv.fr/publications/public/2014/LCDFDF14},
year = {2014},
date = {2014-01-01},
journal = {Fluid Phase Equilibria},
volume = {372},
pages = {63--68},
abstract = {Semiclathrate hydrates formed from binary systems of tetra-n-butylammonium bromide (TBAB) + water and tetra-n-butylphosphonium bromide (TBPB) + water have been investigated for their promising application in the refrigeration system. In the present work, semiclathrate hydrates in the ternary system of TBAB + TBPB + water were studied for the first time, in the presence and absence of CO2 pressure. Using DSC technique, the dissociation temperatures of semiclathrate hydrates were determined at the mass fraction of salt mixture ranges from 0.05 to 0.60 with variable composition from pure TBAB to pure TBPB. At any salt concentration tested, the dissociation temperature of semiclathrate hydrates increased regularly with TBAB composition increase. Applying CO2 pressure in the TBAB + TBPB + water system resulted in further increase of dissociation temperature due to the gas enclathration in the mixed hydrate structure. The phase transition enthalpy of semiclathrate hydrates were investigated at wsalts = 0.40 and variable TBPB compositions, without CO2 and with p CO 2 = 1.0 ? MPa . It was found that the dissociation enthalpies of CO2-free and CO2-containing semiclathrate hydrates are almost independent of the TBPB salt composition. From our current results, TBAB + TBPB + CO2 hydrates appear as valuable phase change materials to be used as hydrate slurries for cold storage and transportation in applications requiring variable working temperatures.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Semiclathrate hydrates formed from binary systems of tetra-n-butylammonium bromide (TBAB) + water and tetra-n-butylphosphonium bromide (TBPB) + water have been investigated for their promising application in the refrigeration system. In the present work, semiclathrate hydrates in the ternary system of TBAB + TBPB + water were studied for the first time, in the presence and absence of CO2 pressure. Using DSC technique, the dissociation temperatures of semiclathrate hydrates were determined at the mass fraction of salt mixture ranges from 0.05 to 0.60 with variable composition from pure TBAB to pure TBPB. At any salt concentration tested, the dissociation temperature of semiclathrate hydrates increased regularly with TBAB composition increase. Applying CO2 pressure in the TBAB + TBPB + water system resulted in further increase of dissociation temperature due to the gas enclathration in the mixed hydrate structure. The phase transition enthalpy of semiclathrate hydrates were investigated at wsalts = 0.40 and variable TBPB compositions, without CO2 and with p CO 2 = 1.0 ? MPa . It was found that the dissociation enthalpies of CO2-free and CO2-containing semiclathrate hydrates are almost independent of the TBPB salt composition. From our current results, TBAB + TBPB + CO2 hydrates appear as valuable phase change materials to be used as hydrate slurries for cold storage and transportation in applications requiring variable working temperatures. |
Frédérick Mballa-Mballa; Olivier Hubert; Song He; Sophie Depeyre; Philip Meilland Micromagnetic Modeling of Magneto-Mechanical Behavior Article de journal Dans: IEEE Transactions on Magnetics, 50 (4), p. 1–4, 2014, ISSN: 0018-9464. Résumé | Liens | BibTeX @article{Mballa_IEEE,
title = {Micromagnetic Modeling of Magneto-Mechanical Behavior},
author = {Frédérick Mballa-Mballa and Olivier Hubert and Song He and Sophie Depeyre and Philip Meilland},
url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6798024},
doi = {10.1109/TMAG.2013.2288911},
issn = {0018-9464},
year = {2014},
date = {2014-01-01},
journal = {IEEE Transactions on Magnetics},
volume = {50},
number = {4},
pages = {1--4},
publisher = {IEEE},
abstract = {A magneto-mechanical static modeling of ferromagnetic particle based on minimization of an energy function is presented. This modeling is made of a conjugate gradient method coupled with finite-element method for the mechanical problem resolution. Two-dimensional computational results highlighting the influence of magneto-mechanical coupling on the magnetic microstructure and behavior are reported.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A magneto-mechanical static modeling of ferromagnetic particle based on minimization of an energy function is presented. This modeling is made of a conjugate gradient method coupled with finite-element method for the mechanical problem resolution. Two-dimensional computational results highlighting the influence of magneto-mechanical coupling on the magnetic microstructure and behavior are reported. |
Xingjun Wang; Olivier Hubert; Song HE; Frédérick MBALLA-MBALLA; Ying HUANG Reversible magnetomechanical modeling of heterogeneous media Article de journal Dans: Journal Superconduc Novel Magnetism, 27 (9), p. 2049–2058, 2014, ISSN: 1557-1939. Résumé | Liens | BibTeX @article{Wang_Superconduc,
title = {Reversible magnetomechanical modeling of heterogeneous media},
author = {Xingjun Wang and Olivier Hubert and Song HE and Frédérick MBALLA-MBALLA and Ying HUANG},
doi = {10.1007/s10948-014-2536-x},
issn = {1557-1939},
year = {2014},
date = {2014-01-01},
journal = {Journal Superconduc Novel Magnetism},
volume = {27},
number = {9},
pages = {2049--2058},
publisher = {Springer US},
abstract = {Localization and homogenization of the magnetomechanical fields in heterogeneous media are discussed. The magnetoelastic modeling for magnetic polycrystals is extended from the description of the singlecrystal modeling. This model is then applied to the prediction of the behavior of dual-phase steels. Each phase can be considered as a sphere embedded in a homogeneous equivalent medium. The magnetic model used for each phase is an explicit single-crystalline model representative of the behavior of the corresponding phase. Homogenization rules allow the simulation of the average medium. Experiments are carried out and compared to the numerical results.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Localization and homogenization of the magnetomechanical fields in heterogeneous media are discussed. The magnetoelastic modeling for magnetic polycrystals is extended from the description of the singlecrystal modeling. This model is then applied to the prediction of the behavior of dual-phase steels. Each phase can be considered as a sphere embedded in a homogeneous equivalent medium. The magnetic model used for each phase is an explicit single-crystalline model representative of the behavior of the corresponding phase. Homogenization rules allow the simulation of the average medium. Experiments are carried out and compared to the numerical results. |
Conférences |
Morad Lakhssassi; Salim Bouabdallah Typology analysis for the optimization of a stamping process Conférence 11th World Congress on Computational Mechanics (WCCM XI), Barcelona, 2014. BibTeX @conference{Bouabdallah2014,
title = {Typology analysis for the optimization of a stamping process},
author = { Morad Lakhssassi and Salim Bouabdallah},
year = {2014},
date = {2014-07-20},
publisher = {11th World Congress on Computational Mechanics (WCCM XI), Barcelona},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
|
Cédric Adam; Salim Bouabdallah; Malek Zarroug; Habibou Maitournam Numerical integration for locking treatment in isogeometric structural elements Conférence Isogeometric Analysis Applications (IGAAA 2014), Annweiler Am Trifels, Germany, 2014. BibTeX @conference{Bouabdallah2014b,
title = {Numerical integration for locking treatment in isogeometric structural elements},
author = { Cédric Adam and Salim Bouabdallah and Malek Zarroug and Habibou Maitournam},
year = {2014},
date = {2014-04-07},
publisher = {Isogeometric Analysis Applications (IGAAA 2014), Annweiler Am Trifels, Germany},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
|
Thèses |
Pascal Clain Couplage entre le stockage et la distribution de froid par coulis d hydrates Thèse Université Pierre et Marie Curie, 2014. Résumé | Liens | BibTeX @phdthesis{Cla14,
title = {Couplage entre le stockage et la distribution de froid par coulis d hydrates},
author = { Pascal Clain},
url = {http://labs.esilv.fr/publications/public/2014/Cla14},
year = {2014},
date = {2014-01-01},
school = {Université Pierre et Marie Curie},
abstract = {The use of hydrate slurries as two-phase secondary refrigerants (FFD) reduces the environmental impact of refrigeration systems because these fluids have a high energy density. They can be used for cold storage will be a solution at an industrial problem of cold distribution at various temperature levels (air-conditioning, cooling process or preservation temperature). In this work, we study the coupling between a storage device and a cold distribution system by hydrate slurries. For achieve this objective, a two-stage reactor has been built for simulate the process. Equilibrium conditions studies for single and mixed hydrate showed an equilibrium temperature shift in porous media without deterioration of latent heat fusion. Hydrates formation/dissociation kinetics have been studied according to crystallization classical theories and an empirical model was obtained. Rheological studies of hydrate slurries emphasized a shear-thinning behavior for both, but a high propensity for agglomeration for mixed hydrate slurry. Particle size analysis showed the slurry has bimodal crystals distribution. Experimental set-up characterization showed process parameters effect in induction time. A 2D numerical tool integrating various empirical relations was developed for modelling temperature profile in the reactor and was validated in a first approach},
keywords = {},
pubstate = {published},
tppubtype = {phdthesis}
}
The use of hydrate slurries as two-phase secondary refrigerants (FFD) reduces the environmental impact of refrigeration systems because these fluids have a high energy density. They can be used for cold storage will be a solution at an industrial problem of cold distribution at various temperature levels (air-conditioning, cooling process or preservation temperature). In this work, we study the coupling between a storage device and a cold distribution system by hydrate slurries. For achieve this objective, a two-stage reactor has been built for simulate the process. Equilibrium conditions studies for single and mixed hydrate showed an equilibrium temperature shift in porous media without deterioration of latent heat fusion. Hydrates formation/dissociation kinetics have been studied according to crystallization classical theories and an empirical model was obtained. Rheological studies of hydrate slurries emphasized a shear-thinning behavior for both, but a high propensity for agglomeration for mixed hydrate slurry. Particle size analysis showed the slurry has bimodal crystals distribution. Experimental set-up characterization showed process parameters effect in induction time. A 2D numerical tool integrating various empirical relations was developed for modelling temperature profile in the reactor and was validated in a first approach |
Actes |
Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet A decoupled approach for computing the response of structures made of heterogeneous, random elastoplactic composites with hardening Actes 11th. World Congress on Computational Mechanics (WCCM XI), Barcelona, SPAIN, 2014. Résumé | Liens | BibTeX @proceedings{HOANG2014b,
title = {A decoupled approach for computing the response of structures made of heterogeneous, random elastoplactic composites with hardening},
author = { Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},
url = {https://www.esilv.fr/ecole-ingenieur/wp-content/uploads/2014/07/a1303.pdf},
year = {2014},
date = {2014-07-25},
publisher = {11th. World Congress on Computational Mechanics (WCCM XI)},
address = {Barcelona, SPAIN},
abstract = {A decoupled approach for computing the response of structures made of heterogeneous, random elastoplactic composites with hardening},
keywords = {},
pubstate = {published},
tppubtype = {proceedings}
}
A decoupled approach for computing the response of structures made of heterogeneous, random elastoplactic composites with hardening |
Amen Tognevi; Mohamed Guerich; Julien Yvonnet Computational modelling of heterogeneous structures without scale separation: an approach based on nonlocal filter-based homogenization Actes 11th. World Congress on Computational Mechanics (WCCM XI), Barcelona, SPAIN, 2014. Liens | BibTeX @proceedings{atognevi2014b,
title = {Computational modelling of heterogeneous structures without scale separation: an approach based on nonlocal filter-based homogenization},
author = { Amen Tognevi and Mohamed Guerich and Julien Yvonnet},
url = {https://www.esilv.fr/ecole-ingenieur/wp-content/uploads/2014/07/a3013.pdf},
year = {2014},
date = {2014-07-20},
publisher = {11th. World Congress on Computational Mechanics (WCCM XI)},
address = {Barcelona, SPAIN},
keywords = {},
pubstate = {published},
tppubtype = {proceedings}
}
|
Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet A procedure to determine the size of RVE nonlinear random heterogeneous material based on an incremental homogenization method Actes Stony Brook University Mechanics of Composites 2014 (MECHCOMP2014), June 8 - 12, 2014, USA, 2014. BibTeX @proceedings{HOANG2014,
title = {A procedure to determine the size of RVE nonlinear random heterogeneous material based on an incremental homogenization method},
author = { Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},
year = {2014},
date = {2014-06-08},
publisher = {Mechanics of Composites 2014 (MECHCOMP2014), June 8 - 12, 2014},
address = {USA},
organization = {Stony Brook University},
keywords = {},
pubstate = {published},
tppubtype = {proceedings}
}
|
Non publié |
Radoin Belaouar; Arash Fahim; Nizar Touzi Optimal Production Policy in Carbon Emission Marke (preprint) Non publié 2014. Résumé | BibTeX @unpublished{carbon,
title = {Optimal Production Policy in Carbon Emission Marke (preprint)},
author = { Radoin Belaouar and Arash Fahim and Nizar Touzi},
year = {2014},
date = {2014-01-01},
abstract = {The aim of this paper is to address the effect of the carbon emission allowance market on the production policy of a polluter production firm. We investigate this effect in three cases; when the firm is not a large polluter, when it has a large contribution in emission of carbon but can not affect the risk premium of the allowance market, and when it is a large contributor in the emission of carbon and can change the risk premium by its production. In our simple model, we ignore any possible investment of the firm in pollution reducing technologies. We formulate the problem of optimal production by a stochastic optimization problem. Then, we show that, as expected, the market reduces the optimal production policy in the first two cases. However, when the large producer activities can change the market risk premium, the cut on the production and consequently pollution cannot be guaranteed. In fact, our numerical test shows that for some models in our framework, the increase in production, and thus pollution, can increase the profit of the firm.},
keywords = {},
pubstate = {published},
tppubtype = {unpublished}
}
The aim of this paper is to address the effect of the carbon emission allowance market on the production policy of a polluter production firm. We investigate this effect in three cases; when the firm is not a large polluter, when it has a large contribution in emission of carbon but can not affect the risk premium of the allowance market, and when it is a large contributor in the emission of carbon and can change the risk premium by its production. In our simple model, we ignore any possible investment of the firm in pollution reducing technologies. We formulate the problem of optimal production by a stochastic optimization problem. Then, we show that, as expected, the market reduces the optimal production policy in the first two cases. However, when the large producer activities can change the market risk premium, the cut on the production and consequently pollution cannot be guaranteed. In fact, our numerical test shows that for some models in our framework, the increase in production, and thus pollution, can increase the profit of the firm. |
2013 |
Articles de journaux |
Shiva Kumar Malapaka; Bruno Després; Rémy Sart Unconditionally stable numerical simulations of a new generalized reduced resistive magnetohydrodynamics model Article de journal Dans: International Journal for Numerical Methods in Fluids, 74 (4), p. 231-249, 2013. Résumé | Liens | BibTeX @article{Malapaka2013,
title = {Unconditionally stable numerical simulations of a new generalized reduced resistive magnetohydrodynamics model},
author = { Shiva Kumar Malapaka and Bruno Després and Rémy Sart},
url = {http://onlinelibrary.wiley.com/doi/10.1002/fld.3847/abstract},
year = {2013},
date = {2013-10-10},
journal = {International Journal for Numerical Methods in Fluids},
volume = {74},
number = {4},
pages = {231-249},
abstract = {Reduced-resistive magnetohydrodynamics (MHD) models are used in understanding different phenomenon in various domains, for example, astrophysics to model magnetotail or for solar arcades [Finn Bozkaya JM, Guzdar PN. Loss of equilibrium and reconnection in tearing of two dimensional equilibrias. Physics of Fluids B 1993; 5:2870–2876], modeling plasma confinements in reverse field pinch [Strauss HR. The dynamo effect in fusion plasmas. Physics of Fluids 1985; 28:2786–2792] and tokamaks [Strauss HR. Reduced MHD in nearly potential magnetic fields. Journal of Plasma Physics 1997; 57(1):83–87; Freidberg J. Plasma Physics and Fusion Energy. Cambridge University Press: Cambridge, 2008]. In this context, recently, a new generalized reduced-resistive MHD model, which can make use of an arbitrary density profile was proposed [Després B, Sart R. Reduced resistive MHD in Tokamaks with general density. ESAIM: Mathematical Modelling and Numerical Analysis 2012; 46(5):1081–1106. EDP Sciences, SMAI, 2012 online 2011]. We in this work show that this proposed theoretical model can be realized numerically as well, and that it is very robust if the equation set is written in a very particular form using the properties of FEM. To illustrate these points, we pick the current hole configuration [Fujita T, Oikawa T, Suzuki?T, Ide S, Sakamoto Y, Koide Y, Hatae T, Naito O, Isayama A, Hayashi N, Shirai H. Plasma equilibrium and confinement in a tokamak with nearly zero central current density in JT-60U. Physical Review Letters 2001; 87(11):245001; Hawkes NC, Stratton BC, Tala T, Challis CD, Conway G, DeAngelis R, Giroud C, Hobirk J, Joffrin E, Lomas P, Lotte P, Mailloux J, Mazon D, Rachlew E, Reyes-Cortes S, Solano E, Zastrow K-D. Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive. Physical Review Letters 2001; 87(11):115001], which was modeled using reduced-resistive MHD and remodel it using different combinations of current sources and density profiles. Our model can be implemented with reasonable computational resources at the price of solving a well-posed global linear system and it is unconditionally stable. These features are also demonstrated as a part of our numerical experiments. Copyright © 2013 John Wiley & Sons, Ltd.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Reduced-resistive magnetohydrodynamics (MHD) models are used in understanding different phenomenon in various domains, for example, astrophysics to model magnetotail or for solar arcades [Finn Bozkaya JM, Guzdar PN. Loss of equilibrium and reconnection in tearing of two dimensional equilibrias. Physics of Fluids B 1993; 5:2870–2876], modeling plasma confinements in reverse field pinch [Strauss HR. The dynamo effect in fusion plasmas. Physics of Fluids 1985; 28:2786–2792] and tokamaks [Strauss HR. Reduced MHD in nearly potential magnetic fields. Journal of Plasma Physics 1997; 57(1):83–87; Freidberg J. Plasma Physics and Fusion Energy. Cambridge University Press: Cambridge, 2008]. In this context, recently, a new generalized reduced-resistive MHD model, which can make use of an arbitrary density profile was proposed [Després B, Sart R. Reduced resistive MHD in Tokamaks with general density. ESAIM: Mathematical Modelling and Numerical Analysis 2012; 46(5):1081–1106. EDP Sciences, SMAI, 2012 online 2011]. We in this work show that this proposed theoretical model can be realized numerically as well, and that it is very robust if the equation set is written in a very particular form using the properties of FEM. To illustrate these points, we pick the current hole configuration [Fujita T, Oikawa T, Suzuki?T, Ide S, Sakamoto Y, Koide Y, Hatae T, Naito O, Isayama A, Hayashi N, Shirai H. Plasma equilibrium and confinement in a tokamak with nearly zero central current density in JT-60U. Physical Review Letters 2001; 87(11):245001; Hawkes NC, Stratton BC, Tala T, Challis CD, Conway G, DeAngelis R, Giroud C, Hobirk J, Joffrin E, Lomas P, Lotte P, Mailloux J, Mazon D, Rachlew E, Reyes-Cortes S, Solano E, Zastrow K-D. Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive. Physical Review Letters 2001; 87(11):115001], which was modeled using reduced-resistive MHD and remodel it using different combinations of current sources and density profiles. Our model can be implemented with reasonable computational resources at the price of solving a well-posed global linear system and it is unconditionally stable. These features are also demonstrated as a part of our numerical experiments. Copyright © 2013 John Wiley & Sons, Ltd. |
Mohamed Guerich; Samir Assaf Optimization of Noise Transmission through Damped Sandwich Structures Article de journal Dans: Journal of Vibration and Acoustics, 135 (5), p. 1-13, 2013. Résumé | Liens | BibTeX @article{GUERICH2013,
title = {Optimization of Noise Transmission through Damped Sandwich Structures},
author = { Mohamed Guerich and Samir Assaf},
url = {http://www.researchgate.net/publication/262456008_Optimization_of_Noise_Transmission_through_Damped_Sandwich_Structures},
year = {2013},
date = {2013-10-01},
journal = {Journal of Vibration and Acoustics},
volume = {135},
number = {5},
pages = {1-13},
abstract = {An optimization methodology to increase the noise transmission loss (TL) of damped sandwich structures is presented. The prediction of the TL uses a numerical tool based on a finite element formulation for the sandwich plate coupled to a boundary element method for the acoustic medium. This tool can be used for arbitrarily shaped three-layer sandwich plates with various boundary conditions and it is well adapted to parametric and optimization studies. First, a parametric study was conducted to choose the objective function, the constraints, and the pertinent design variables to use in the optimization problem which consist in reducing the sound power transmitted by a viscoelastically damped sandwich plate. Next, by constraining the acoustical behavior of the sandwich panel, the surface mass of the sandwich structure was minimized. It is shown that a significant reduction in the transmitted sound power can be achieved by selecting the appropriate geometric configuration and damping layer material.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
An optimization methodology to increase the noise transmission loss (TL) of damped sandwich structures is presented. The prediction of the TL uses a numerical tool based on a finite element formulation for the sandwich plate coupled to a boundary element method for the acoustic medium. This tool can be used for arbitrarily shaped three-layer sandwich plates with various boundary conditions and it is well adapted to parametric and optimization studies. First, a parametric study was conducted to choose the objective function, the constraints, and the pertinent design variables to use in the optimization problem which consist in reducing the sound power transmitted by a viscoelastically damped sandwich plate. Next, by constraining the acoustical behavior of the sandwich panel, the surface mass of the sandwich structure was minimized. It is shown that a significant reduction in the transmitted sound power can be achieved by selecting the appropriate geometric configuration and damping layer material. |
