Stabilization of thermal lattice Boltzmann models

Journal Article · Sun Oct 01 00:00:00 EDT 1995 · Journal of Statistical Physics

DOI:https://doi.org/10.1007/BF02179986· OSTI ID:468307

McNamara, G R ^[1]; Garcia, A L; Alder, B J ^[2]

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1. Los Alamos National Lab., NM (United States)
2. Lawrence Livermore National Lab., CA (United States)

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 an adjustable time step. Good agreement with a conventional finite-difference Navier-Stokes solver is obtained in modeling compressible Rayleigh-Benard convection when boundary conditions are treated similarly.

• Sponsoring Organization: USDOE
• OSTI ID: 468307
• Journal Information: Journal of Statistical Physics, Journal Name: Journal of Statistical Physics Journal Issue: 1-2 Vol. 81; ISSN JSTPBS; ISSN 0022-4715
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
66 PHYSICS
ADVECTION
BOLTZMANN STATISTICS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CONVECTION
FINITE DIFFERENCE METHOD
GASES
MATHEMATICAL MODELS
NAVIER-STOKES EQUATIONS
THERMAL DIFFUSION
VISCOUS FLOW