Ali, Md Sujaat, Trépanier, Jean-Yves et Leclaire, Sébastien.
2025.
« A sharp interface immersed boundary approach for simplified and highly stable lattice Boltzmann method ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
The Lattice Boltzmann Method is a mesoscopic method and has been used for some time as a computational fluid dynamics solver. The recently developed Simplified and Highly Stable Lattice Boltzmann Method (SHSLBM) simplifies the boundary condition implementation to a great extent as it can be implemented using the macroscopic variables instead of distribution functions in traditional Lattice Boltzmann Method. Moreover, it can simulate incompressible flows without evolution of the distribution function, making it less computationally expensive. However, it is still a challenge to implement it for flow around geometry not aligned with the mesh. Immersed boundary Method is used for the flow around geometries without body fitted mesh therefore making it as an ideal choice to extend SHSLBM to simulate flow around geometries not aligned with the mesh. In the present work, for the first time a combination of a sharp interface Immersed Boundary approach is implemented for the boundary treatment of the non-aligned geometry for Simplified and Highly Stable Lattice Boltzmann Method. The implementation is done using an extrapolation of the macroscopic flow variables to the ghost (solid) nodes using a Least-Square technique, for both Neumann and Dirichlet boundary type. The present work is verified for a Poiseuille flow test case and a code-to-code verification is done for flow around square cylinder in a channel, with Immersed Boundary, and a comparison is made with flow around square cylinder without Immersed Boundary.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:08 |
| Dernière modification: | 18 déc. 2025 15:08 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32353 |
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