Thermal Lattice Boltzmann Models (TLBM) for Compressible Flows

Published

December 1, 1998

Author(s)

G Vahala, P Pavlo, L Vahala, Nicos Martys

Abstract

The progress and challenges in thermal lattice Boltzmann modeling are discussed. In particular, momentum and energy closures schemes are contrasted. Higher order symmetric (but no longer space filling) velocity lattices are constructed for both 2D and 3D flows and shown to have superior stability properties to the standard (but lower symmetry lattices. While this decouples the velocity lattice from the spatial grid, the interpolation required following free-streaming is just 1D. The connection between fixed lattice vectors and temperature-dependent lattice vectors (obtained in the Gauss-hermite quadrature approach) is discussed. Some (compressible) Rayleigh-Benard simulations on the 2D octagonal lattice are presented for extended BGK collision operators that allow for arbitrary Prandtl numbers.

Proceedings Title

Proceedings of the 7th International Conference of Modern Physics A

Volume

9

Issue

No. 8

Conference Dates

July 14-18, 1998

Conference Location

, 1, EN

Conference Title

International Journal of Modern Physics. A

Pub Type

Conferences

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Keywords

compressive fluids, heat transfer, hydrodynamics, lattice Boltzmann, Rayleigh-Benard

Citation

Vahala, G. , Pavlo, P. , Vahala, L. and Martys, N. (1998), Thermal Lattice Boltzmann Models (TLBM) for Compressible Flows, Proceedings of the 7th International Conference of Modern Physics A, , 1, EN, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860157 (Accessed April 25, 2024)