Incorporating Turbulence Models into the Lattice-Boltzmann Method

Christopher M. Teixeira ()
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Christopher M. Teixeira: Exa Corporation, 450 Bedford Street Lexington, Massachusetts 02420, USA

International Journal of Modern Physics C (IJMPC), 1998, vol. 09, issue 08, 1159-1175

Abstract: The Lattice-Boltzmann method (LBM) is extended to allow incorporation of traditional turbulence models. Implementation of a two-layer mixing-length algebraic model and two versions of thek-εtwo-equation model, Standard and RNG, in conjunction with a wall model, are presented. Validation studies are done for turbulent flows in a straight pipe at three Re numbers and over a backwards facing step of expansion ratio 1.5 andReH=44 000. All models produce good agreement with experiment for the straight pipes but the RNGk-εmodel is best able to capture both the recirculation length, within 2% of experiment, and the detailed structure of the mean fluid flow for the backwards facing step.

Keywords: Lattice-Boltzmann Method; Turbulence Models; Validation; Backwards-Facing Step (search for similar items in EconPapers)
Date: 1998
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DOI: 10.1142/S0129183198001060

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