Structural stability of Lattice Boltzmann schemes - Sorbonne Université
Journal Articles Physica A: Statistical Mechanics and its Applications Year : 2016

Structural stability of Lattice Boltzmann schemes

Abstract

The goal of this work is to determine classes of traveling solitary wave solutions for Lattice Boltzmann schemes by means of an hyperbolic ansatz. It is shown that spurious solitary waves can occur in finite-difference solutions of nonlinear wave equation. The occurence of such a spurious solitary wave, which exhibits a very long life time, results in a non-vanishing numerical error for arbitrary time in unbounded numerical domain. Such a behavior is referred here to have a structural instability of the scheme, since the space of solutions spanned by the numerical scheme encompasses types of solutions (solitary waves in the present case) that are not solutions of the original continuous equations. This paper extends our previous work about classical schemes to Lattice Boltzmann schemes ([1], [2], [3],[4]).
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Dates and versions

hal-01298987 , version 1 (20-04-2016)

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Claire David, Pierre Sagaut. Structural stability of Lattice Boltzmann schemes. Physica A: Statistical Mechanics and its Applications, 2016, 444, pp.1-8. ⟨10.1016/j.physa.2015.09.089⟩. ⟨hal-01298987⟩
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