Title: Analysis of lattice Boltzmann nodes initialisation in moving boundary problems

Authors: A. Caiazzo

Addresses: Fraunhofer ITWM, Fraunhofer-Platz, 1, D-67663 Kaiserslautern, Germany

Abstract: The lattice Boltzmann method (LBM) is a numerical scheme based on a fixed grid. Dealing with moving boundary problems, proper routines are needed to initialise the variables at the new nodes, created by the variations of the computational fluid domain. We use asymptotic analysis to investigate the problem and possible solutions. A simple algorithm is proposed, able to achieve the same accuracy as the standard LBM. The theoretical predictions are tested on simple benchmarks.

Keywords: lattice Boltzmann method; LBM; lattice Boltzmann initialisation; asymptotic analysis; moving boundary problems; nodes initialisation; computational fluid dynamics; CFD.

DOI: 10.1504/PCFD.2008.018074

Progress in Computational Fluid Dynamics, An International Journal, 2008 Vol.8 No.1/2/3/4, pp.3 - 10

Published online: 30 Apr 2008 *

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