Modeling Group

@article{yakoubi_1695,

title = {A Coupled prediction scheme for solving the Navier-Stokes and convection-diffusion equations,},

author = {Driss Yakoubi},

url = {https://epubs-siam-org.acces.bibl.ulaval.ca/doi/abs/10.1137/130942516},

year  = {2014},

date = {2014-10-01},

journal = {Siam Journal On Numerical Analysis},

volume = {52},

number = {5},

pages = {2415-2439},

abstract = {This paper presents a new algorithm for the numerical solution of the Navier--Stokes equations coupled with the convection-diffusion equation. After establishing convergence of the semi-discrete formulation at each time step, we introduce a new iterative scheme based on a projection method called the coupled prediction scheme. We show that even though the predicted temperature is advected by a velocity prediction which is not necessarily divergence free, the theoretical time accuracy of the global scheme is conserved. From a numerical point of view, this new approach gives a faster and more efficient algorithm compared to the usual fixed-point approaches.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{kanhonou_1710,

title = {A method to study 3D knee pseudo-kinematics using low-dose stereo-radiography during static squat},

author = {Michèle Kanhonou and Thierry Cresson and Julien Clément and Frédéric Lavoie and Nicola Hagemeister and Jacques A. de Guise},

url = {https://www.tandfonline.com/doi/abs/10.1080/10255842.2014.931549},

year  = {2014},

date = {2014-08-01},

journal = {Computer Methods In Biomechanics And Biomedical Engineering},

volume = {17},

number = {1},

pages = {138-139},

abstract = {To investigate clinical questions as kinematic or postural differences between healthy and pathological populations,the current trend is to couple imagery to movement or to posture. To do so, researchers generally register a three-dimensional (3D) model acquired from either CT scan or magnetic resonance imaging on 2D fluoroscopic images(registration on dynamic activities) or several radiographs (registration on posture or pseudo-kinematics) (Moro-oka et al.2007). The literature suggests the use of so-called?extrinsic 2D/3D registration'. This implies the need of geometrical objects in the radiographic scene. Embedded tantalum beads or prostheses (Scarvell et al.2010; Sharmaet al.2012), well detectable on the radiographs, are generally used. They allow attaining the expected measurement accuracy <1° and <1mm. When no tantalum beads or prostheses are present, the registration process lacks reliability and accuracy because of the difficulty to extract precise information from the radiographic images (blurry contours, superimposition of structures and cylindrical nature of long bones) (Belvedere et al.2013). The goal of this work was to present an intrinsic 2D/3D registration method and to validate its reliability on patients' images as well as its accuracy on simulated radiographs in a pseudo-kinematic context.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{kanhonou_1711,

title = {2D/3D Registration of Personalized Knee 3D Models on Biplane Radiographs for Morpho-Functional Study},

author = {Michèle Kanhonou and Thierry Cresson and Julien Clément and Frédéric Lavoie and Nicola Hagemeister and Jacques A. de Guise},

url = {https://link.springer.com/article/10.1007%2Fs11548-014-1017-9},

year  = {2014},

date = {2014-06-01},

journal = {International Journal Of Computer Assisted Radiology And Surgery},

volume = {9},

pages = {31-34},

abstract = {To investigate kinematic or postural differences between healthy and pathological  population,  researchers  generally  register  a  3D  model acquired either from CT scan or MRI on 2D fluoroscopic images or several  radiographs  (registration  on  static  posture  images:  pseudo-kinematics). To attain the needed measurement  accuracy, the literature  suggests  the  use  of  extrinsic  2D/3D  registration,  with  known geometries in the scene (embedded tantalum beads or prostheses [1]). The goal of this work is to present an intrinsic 2D/3D registration method, to validate its reliability on patients' images and its accuracy on simulated radiographs in a pseudo-kinematic context.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{yakoubi_1696,

title = {An immersed boundary method for fluid flows around rigid objects},

author = {Driss Yakoubi},

url = {https://onlinelibrary-wiley-com.acces.bibl.ulaval.ca/doi/10.1002/fld.3884},

year  = {2014},

date = {2014-02-01},

journal = {International Journal for Numerical Methods in Fluids},

volume = {75},

number = {1},

pages = {63-80},

abstract = {In this paper, we present an immersed boundary method for solving fluid flow problems in the presence of static and moving rigid objects. A FEM is used starting from a base mesh that does not represent exactly rigid objects (non?body?conforming mesh). At each time step, the base mesh is locally modified to provide a new mesh fitting the boundary of the rigid objects. The mesh is also locally improved using edge swapping to enhance the quality of the elements. The Navier-Stokes equations are then solved on this new mesh. The velocity of moving objects is imposed through standard Dirichlet boundary conditions. We consider a number of test problems and compare the numerical solutions with those obtained on classical body?fitted meshes whenever possible.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{guerard_1615,

title = {Smart Grid and Optimization},

author = {Guillaume Guérard},

url = {https://www.scirp.org/html/13-1040207_27556.htm},

year  = {2013},

date = {2013-01-01},

journal = {American Journal of Operations Research},

volume = {3},

number = {1A},

pages = {11},

abstract = {With urging problem of energy and pollution, smart grid is becoming ever important. By gradually changing the actual power grid system, smart grid may evolve into different systems by means of size, elements and strategies, but its fundamental requirements and objectives will not change such as optimizing production, transmission and consumption. Studying the smart grid through modeling and simulation provides us with valuable results which can not be obtained in real world due to time and cost related constraints. However, due to the complexity of the smart grid, achieving optimization is not an easy task, even using computer models. In this paper, we propose a complex system based approach to the smart grid modeling, accentuating on the optimization by combining game theoretical and classical methods in different levels. Thanks to this combination, the optimization can be achieved with flexibility and scalability, while keeping its generality.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{guerard_1616,

title = {Survey on smart grid modelling},

author = {Guillaume Guérard},

url = {https://www.inderscienceonline.com/doi/abs/10.1504/IJSCC.2012.050822},

year  = {2012},

date = {2012-12-01},

journal = {International Journal Of Data Mining And Bioinformatics},

volume = {4},

number = {4},

pages = {262-279},

abstract = {Smart grid is a vague concept with little theoretical studies. We propose in this paper a state of the art on smart grids to clarify the concept and identify the important issues. We analyse different visions to bring out the characteristics of smart grids.



This term refers to an electrical optimised network integrating the behaviour and actions of users (generators, consumers, consume-actors, etc.). These power grid's upgrades aim: to improve quality and security, to reduce environmental impact, and allow consumers to play a regulation role in the system.



Current simulations are done on specific cases and with a limited evolution. A better knowledge of the smart grid structure and characteristics would give a more effective and more efficient, global modelling. Smart grids have many characteristics corresponding to complex systems. We propose to analyse these similarities to reach a better understanding and a holistic view of smart grid's concept.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{hamdache_1785,

title = {Existence and uniqueness of solutions for the magnetohydrodynamic flow of a second grade fluid},

author = {Kamel Hamdache and Basma Jaffal-Moutarda},

url = {https://www.researchgate.net/publication/258804643_Existence_and_uniqueness_of_solutions_for_the_magnetohydrodynamic_flow_of_a_second_grade_fluid},

year  = {2012},

date = {2012-06-01},

journal = {Mathematical Methods In The Applied Sciences},

volume = {36},

number = {4},

pages = {478-496},

abstract = {In this work, we consider the flow of a second grade fluid in a conducting domain of R3 and in the presence of a magnetic field. When the initial data are of arbitrary size, we prove that the solution of the magnetohydrodynamics problem exists for a small time and is unique. We also show the global existence of solutions for small initial data.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{jaffal-moutarda_1784,

title = {Long-time asymptotics of the second grade fluid equations on R^2},

author = {Basma Jaffal-Moutarda},

url = {https://www.intlpress.com/site/pub/pages/journals/items/dpde/content/vols/0008/0003/a002/},

year  = {2011},

date = {2011-09-01},

journal = {Dynamics Of Partial Differential Equations},

volume = {8},

number = {3},

pages = {185-223},

abstract = {We study the large time behavior of solutions of the second grade fluid system in the space R². Using scaled variables and introducing several functionals in weighted Sobolev spaces, we prove that the solution of the second grade fluid equations converges to the Oseen vortex, if the initial data are small enough. We also give an estimate of the rate of convergence.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{yakoubi_1697,

title = {Influence of the spray retroaction on the airflow},

author = {Driss Yakoubi},

url = {https://www.esaim-proc.org},

year  = {2010},

date = {2010-12-01},

journal = {Esaim: proceedings and surveys},

volume = {30},

pages = {153-165},

abstract = {In this work, we investigate the influence of a spray evolving in the air, in the respiration

framework. We consider two kinds of situations: a moving spray in a motionless fluid, and motionless

particles in a Poiseuille flow. We observe that the spray retroaction may not be neglected in some

situations which can really happen, for instance, when one considers rather big particles, as it is possible

for polluting particles and even for some therapeutic aerosols. The retroaction is even responsible for

increasing the deposition phenomenon.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{yakoubi_1699,

title = {An Iterative Procedure to Solve a Coupled Two-Fluids Turbulence Model},

author = {Driss Yakoubi},

url = {https://www-esaim-m2an-org.acces.bibl.ulaval.ca/articles/m2an/abs/2010/04/m2an0827/m2an0827.html},

year  = {2010},

date = {2010-08-01},

journal = {Esaim-Mathematical Modelling And Numerical Analysis-Modelisation Mathematique Et Analyse Numerique},

volume = {44},

number = {4},

pages = {693 - 713},

abstract = {This paper introduces a scheme for the numerical approximation of a model for two turbulent flows with coupling at an interface. We consider the variational formulation of the coupled model, where the turbulent kinetic energy equation is formulated by transposition. We prove the convergence of the approximation to this formulation for 3D flows for large turbulent viscosities and smooth enough flows, whenever bounded in W1,p Sobolev norms for p large enough. Under the same assumptions, we show that the limit is a solution of the initial problem. Finally, we give some numerical experiments to enlighten the theoretical work.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{yakoubi_1698,

title = {Numerical Model for the 2D Simulation of the Respiration},

author = {Driss Yakoubi},

url = {https://www.esaim-proc.org/articles/proc/abs/2009/03/proc092810/proc092810.html},

year  = {2009},

date = {2009-12-01},

journal = {Esaim: proceedings and surveys},

volume = {28},

pages = {162-181},

abstract = {In this article we are interested in the simulation of the air flow in the bronchial tree. The model we use has already been described in [2] and is based on a three part description of the respiratory tract. This model leads, after time discretization, to a Stokes system with non standard dissipative boundary conditions that cannot be easily and directly implemented in most FEM software, in particular in FreeFEM++ [11]. The objective is here to provide a new numerical method that could be implemented in any softwares. After describing the method, we illustrate it by two-dimensional simulations.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{yakoubi_1700,

title = {A Lower Bound for the Inf-Sup Condition's Constant for the Divergence Operator},

author = {Driss Yakoubi},

url = {https://www-sciencedirect-com.acces.bibl.ulaval.ca/science/article/pii/S1631073X08000915?via%3Dihub},

year  = {2008},

date = {2008-03-01},

journal = {Comptes Rendus Mathematique},

volume = {346},

number = {9-10},

pages = {533-538},

abstract = {The inf-sup condition plays an important role in problems from fluid mechanics. The purpose of this Note is to give, for any connected bounded open set ? with a Lipschitz-continuous boundary, a lower bound for the inf-sup condition's constant that only depends on the norm of the harmonic trace lifting on ? and on the where is a constant defined by},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{trompette_1396,

title = {An experimental validation of a vibro-acoustic simplified prediction by the use of simplified methods},

author = {Nicolas Trompette and Mohamed Guerich},

url = {https://www.sciencedirect.com/science/article/abs/pii/S0003682X04001434},

year  = {2005},

date = {2005-01-01},

journal = {Applied Acoustics},

volume = {66},

pages = {427- 445.},

abstract = {Predicting the vibro-acoustic behaviour of a structure is usually done by using the well

established finite element (FE) method and boundary element method. This paper presents

a vibro-acoustic prediction case performed on a metal box using less accurate but simplified

methods: sub-structuring for the calculation of the dynamic response of the structure, and a

monopole distribution for the radiated noise calculation. Both are less accurate but faster

methods than previous ones. An experimental validation was performed. It led to the conclusion

that these methods give precise results and are sufficient for the pre-design of structures in

the low frequency domain. However, this conclusion must be moderated by the fact that in

spite of the simplicity of the structure, the FE model had to be adjusted to the experiments

to yield to a result close to the experiments.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}