Authors: Martin Rheinlander
Addresses: FB Mathematik und Statistik, Universitat Konstanz, Postfach D194, 78457 Konstanz, Germany
Abstract: In this paper we consider a two-population lattice Boltzmann algorithm to approximate the advection equation. First, the stability of this model algorithm is examined. The analysis is based on the analytic computation of the spectrum pertaining to the evolution matrix. After proving a necessary stability condition, the stability of the evolution matrix is shown, which is related to the CFL-condition. We use the model algorithm to demonstrate that formal stability criteria based on a multiscale expansion may fail to predict instability.
Keywords: lattice Boltzmann method; advection; eigenvalues; spectrum; stability; CFL condition; convergence; asymptotic analysis; multiscale expansion; instability prediction.
Progress in Computational Fluid Dynamics, An International Journal, 2008 Vol.8 No.1/2/3/4, pp.56 - 68
Published online: 30 Apr 2008 *Full-text access for editors Access for subscribers Purchase this article Comment on this article