Leclaire, Sébastien

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Sebastien Leclaire

B. Sc., M. Sc., M. Ing., Ph. D.

Publications

Associate Professor
Department of Mechanical Engineering

Phone: (514) 340-4711 Ext. 4400 Fax: (514) 340-5170 Room: C-318.8

s.leclaire@polymtl.ca

Primary sphere of excellence in research
Modeling and Artificial Intelligence

Student research project(s)

I am recruiting

Research interests and affiliations

Research interests

Simulation-Based Engineering Sciences (SBES)
Fluid mechanics
Multiphase flows
Computational fluid dynamics (CFD)
Lattice Boltzmann method (LBM)
Verifications and validations (V&V)
High Performance Computing (HPC)

Affiliation(s)

Research Centre in Industrial Flow Processes (URPEI), Member

Publications

Recent publications

Ndiaye, E. H. A. A., Trépanier, J.-Y., Sousa, R. H., & Leclaire, S. (2025). Conservative Immersed Boundary Methods on Cartesian grids for inviscid compressible flows simulation. International Journal of Heat and Fluid Flow, 114, 109775 (15 pages).

Tucny, J.‐M., Leclaire, S., Vidal, D., & Bertrand, F. (2025). On the Invalidity of the Extended Navier-Stokes Equations to Compute Rarefied Gas Flows in a Cylinder Array. International journal of computational fluid dynamics, 1-18.

Elsherbiny, A. M. M., & Leclaire, S. (2024). Integration of Lattice Boltzmann-overset method with non-conforming quadtree mesh based on the combination of spatial and Lagrangian-link interpolated streaming technique. Computers & Fluids, 106522 (16 pages).

Ho, M., Tucny, J.-M., Ammar, S., Leclaire, S., Reggio, M., & Trépanier, J.-Y. (2024). Lattice boltzmann model for rarefied gaseous mixture flows in three-dimensional porous media including knudsen diffusion. Fluids, 9(10), 237 (26 pages).

See all publications (65)

Biography

I am a passionate professor with over a decade of experience in computational fluid dynamics. More specifically, I am an expert in the field of multiphase flow modeling using lattice Boltzmann methods, an emerging field of research. My research helps to improve the models that are using these methods, to extend the applicability of these approaches to practical cases and to optimize simulation codes for high performance computing.

Over the years, I have acquired a multidisciplinary research experience by joining various teams both in Quebec and around the world: in applied mathematics at the Université de Montréal, in mechanical engineering at Polytechnique Montréal, in civil engineering at ENS Cachan in France, in computer science at the University of Geneva in Switzerland and in chemical engineering at Polytechnique Montréal. Now with the mechanical engineering team at Polytechnique Montréal, I want to stimulate the interest of simulation-based engineering to students of all cycles and to transmit this science for research as well as for practical applications.

Teaching

MEC8270 - Éléments finis en thermofluide

MEC6215 - Méthodes numériques en ingénierie

Education

Baccalauréat en mathématiques pures et appliquées, Université de Montréal
Maîtrise en mathématiques appliquées, Université de Montréal
Maîtrise en génie mécanique, Polytechnique Montréal
Doctorat en génie mécanique, Polytechnique Montréal

Supervision at Polytechnique

COMPLETED

Ph.D. Thesis (4)
- Elsherbiny, A. M. M. (2023). Improved Lattice Boltzmann Method for the Study of Unsteady Flows with Moving Objects [Ph.D. thesis, Polytechnique Montréal].
- Namvar, M. (2023). An Algorithm for the lattice Boltzmann method adapted to sparse geometries and distributed memory systems [Ph.D. thesis, Polytechnique Montréal].
- Ho, M. (2022). Modélisation d'écoulements de mélanges gazeux en régime raréfié par la méthode de Boltzmann sur réseau [Ph.D. thesis, Polytechnique Montréal].
- Tucny, J.-M. (2020). Modélisation des écoulements de gaz raréfiés au travers de filtres fibreux par la méthode de Boltzmann sur réseau [Ph.D. thesis, Polytechnique Montréal].
Master's Thesis (4)
- Bedoux, A. (2023). Simulation de l'hémodynamique ventriculaire gauche pour la caractérisation de la cardiotoxicité induite par la doxorubicine [Master's thesis, Polytechnique Montréal].
- Dubois, P. (2023). Modélisation hémodynamique du ventricule gauche à partir d'images échocardiographiques [Master's thesis, Polytechnique Montréal].
- Garcia Perez, J. (2020). Lattice Boltzmann Approach for the Modeling and Simulation of Water Droplets Impact and Freezing [Master's thesis, Polytechnique Montréal].
- Neveu, M. (2017). Vérification de la méthode de Boltzmann sur réseau en vue de calculer la perméabilité de milieux poreux [Master's thesis, École Polytechnique de Montréal].
Master (professional) (1)
- Iannuzzi, Vincenzo-Enrico

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