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Journal Article

Numerical Passage from Kinetic to Fluid Equations

F. Coron and B. Perthame
SIAM Journal on Numerical Analysis
Vol. 28, No. 1 (Feb., 1991), pp. 26-42
Stable URL: http://www.jstor.org/stable/2157932
Page Count: 17
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Numerical Passage from Kinetic to Fluid Equations
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Abstract

A numerical way to pass from the Bhatnagar-Gross-Krook model of the Boltzmann equation to compressible Euler equations is presented. In order to do so, a stable discretization of the kinetic equation, valid for arbitrary values of the mean free path is described. This requires that the discretization preserves some physical properties: positivity, conservation of mass, momentum, energy, and entropy property. This is motivated by hypersonic computations for reentry problems.

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