PARALLEL LATTICE BGK SIMULATION OF NATURAL CONVECTION IN A CAVITY

作     者：SHI Bao-chang LIU Hong-juan SHI Bao-chang Parallel Computing Institute, Huazhong University of Science and Technology, Wuhan 430074, ChinaLIU Hong-juan Department of Mathematics, Huazhong University of Science and Technology, Wuhan 430074, China

作者机构：Parallel Computing Institute Huazhong University of Science and Technology Wuhan 430074 China Department of Mathematics Huazhong University of Science and Technology Wuhan 430074 China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2005年第17卷第5期

页      面：564-570页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina(GrantNo:70271069 60073044) 

主　　题：Lattice Bhatnagar Gross-Krook ( LB( K )model, Lattice Boltzmann Method (LBM), natural convection, parallel computing, high resolution 

摘      要：A Coupled Lattice Bhatnagar Gross Krook （CLBGK） model was proposed with a robust boundary scheme to model the Bossinesq incompressible flows. The LBGK method is a powerful approach, but is also computationally demanding. Therefore, parallel computing was implemented, and the codes were run on the parallel computer “Lenovo DeepComp 1800 with 24 nodes written in C＋＋ using the Message Passing Interface （MPI） library. Numerical results for natural convection in a cavity with the Rayleigh number （ Ra ） ranging from 10^6 to 4× 10^10 were presented, and found to agree well with the previous work. And with the increase of the resolution rate, the accuracy has been greatly improved. In addition, new models were set up by applying different equilibriums to the CLBGK model to simulate the same problem, which all yield sound results.