ENHANCING STABILITY OF LATTICE-BOLTZMANN SIMULATIONS VIA NEW BOUNDARY CONDITIONS

Lorenzo de La Fuente (), David Ingram (), Clive Mingham (), Derek Causon () and Xiao-Yi He ()
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Lorenzo de La Fuente: Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom
David Ingram: Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom
Clive Mingham: Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom
Derek Causon: Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom
Xiao-Yi He: Computational Modeling Center, Air Product and Chemicals Inc., Allentown, Pennsylvania 18195-1501, United States

International Journal of Modern Physics C (IJMPC), 2003, vol. 14, issue 01, 29-40

Abstract: A new boundary condition is developed to enhance numerical stability for moving walls in lattice-Boltzmann simulations. It includes a population "adjustment" procedure at boundaries which allows stable simulations closer to the theoretical limit ofτ = 0.5. Couette and lid-driven cavity flow simulations show improved velocity profiles, lower stable relaxation timestep τ and higher Reynolds number Re limits. The new method needs fewer timesteps to achieve steady-state.

Keywords: Lattice-Boltzmann; boundary conditions; Couette flow; lid-driven cavity flow; urban canyon (search for similar items in EconPapers)
Date: 2003
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DOI: 10.1142/S0129183103004176

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