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ENHANCING STABILITY OF LATTICE-BOLTZMANN SIMULATIONS VIA NEW BOUNDARY CONDITIONS

LORENZO DE LA FUENTE

Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom

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Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom

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Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom

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Department of Computing and Mathematics, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom

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Computational Modeling Center, Air Product and Chemicals Inc., Allentown, Pennsylvania 18195-1501, United States

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https://doi.org/10.1142/S0129183103004176Cited by:1 (Source: Crossref)

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 of τ = 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.

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Vol. 14, No. 01

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History

Received 24 April 2002

Revised 18 June 2002

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