A Momentum-Exchange/Fictitious Domain-Lattice Boltzmann Method for Solving Particle Suspensions

- Journal title : Transactions of the Korean Society of Mechanical Engineers B
- Volume 40, Issue 6, 2016, pp.347-355
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.3795/KSME-B.2016.40.6.347

Title & Authors

A Momentum-Exchange/Fictitious Domain-Lattice Boltzmann Method for Solving Particle Suspensions

Jeon, Seok Yun; Yoon, Joon Yong; Kim, Chul Kyu; Shin, Myung Seob;

Jeon, Seok Yun; Yoon, Joon Yong; Kim, Chul Kyu; Shin, Myung Seob;

Abstract

This study presents a Lattice Boltzmann Method (LBM) coupled with a momentum-exchange approach/fictitious domain (MEA/FD) method for the simulation of particle suspensions. The method combines the advantages of the LB and the FD methods by using two unrelated meshes, namely, a Eulerian mesh for the flow domain and a Lagrangian mesh for the solid domain. The rigid body conditions are enforced by the momentum-exchange scheme in which the desired value of velocity is imposed directly in the particle inner domain by introducing a pseudo body force to satisfy the constraint of rigid body motion, which is the key idea of a fictitious domain (FD) method. The LB-MEA/FD method has been validated by simulating two different cases, and the results have been compared with those through other methods. The numerical evidence illustrated the capability and robustness of the present method for simulating particle suspensions.

Keywords

Lattice Boltzmann Method;Fluid-Particle Interaction;Momentum Exchange Model;Particle Sedimentation;

Language

Korean

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