An immersed boundary-lattice Boltzmann method for single- and multi-component fluid flows

JOURNAL OF COMPUTATIONAL PHYSICS

卷:304

Article

Li, Zhe^1,2  Favier, Julien¹  D'Ortona, Umberto¹  Poncet, Sebastien^1,3 

[1] Aix Marseille Univ, CNRS, Cent Marseille, UMR 7340,M2P2, F-13451 Marseille, France

[2] Ecole Cent Nantes, LHEEA, CNRS, F-44300 Nantes, France

[3] Univ Sherbrooke, Fac Genie, Dept Genie Mecan, Sherbrooke, PQ J1K 2R1, Canada

关键词: Immersed boundary method;    Lattice Boltzmann method;    Multi-component fluid flow;    Wetting conditions;   

DOI  :  10.1016/j.jcp.2015.10.026

来源: Elsevier

【 摘 要 】

The paper presents a numerical method to simulate single- and multi-component fluid flows around moving/deformable solid boundaries, based on the coupling of Immersed Boundary (IB) and Lattice Boltzmann (LB) methods. The fluid domain is simulated with LB method using the single relaxation time BGK model, in which an interparticle potential model is applied for multi-component fluid flows. The IB-related force is directly calculated with the interpolated definition of the fluid macroscopic velocity on the Lagrangian points that define the immersed solid boundary. The present IB-LB method can better ensure the no-slip solid boundary condition, thanks to an improved spreading operator. The proposed method is validated through several 2D/3D single-and multi-component fluid test cases with a particular emphasis on wetting conditions on solid wall. Finally, a 3D two-fluid application case is given to show the feasibility of modeling the fluid transport via a cluster of beating cilia. (C) 2015 Elsevier Inc. All rights reserved.

【 授权许可】

Free