|
|||||
|
|
Stabilization of thermal lattice Boltzmann models |
|
| Authors: | Guy R McNamara Alejandro L Garcia Berni J Alder |
| Institution: | (1) Theoretical Divison and Center for Non-Linear Studies, Los Alamos Nationalo Laboratory, 87545 Los Alamos, New Mexico;(2) Lawrence Livermore National Laboratory, Institute for Scientific Computing Research L-416, 94550 Livermore, California;(3) Present address: Department of Physics, San Jose State Unviersity, 95192-0106 San Jose, Califoria |
| Abstract: | A three-dimensional thermal lattice-Boltzmann model with two relaxation times to separately control viscosity and thermal diffusion is developed. Numerical stability of the model is significantly improved using Lax-Wendroff advection to provide and adjustable time step. Good agreement with a conventional fiitedifference Navier-Stokes solver is obtained in modeling compressible Rayleigh-Bénard convestion when boundary conditions are treated similarly. |
| Keywords: | Lattice-Boltzmann equation hydrodynamics boundary conditions compressible convection |
| 本文献已被 SpringerLink 等数据库收录！ | |