Derivation of a Nonautonomous Linear Boltzmann Equation from a Heterogeneous Rayleigh Gas

Karsten Matthies, George Stone

Research output: Contribution to journalArticle

Abstract

A linear Boltzmann equation with nonautonomous collision operator is rigorously derived in the Boltzmann-Grad limit for the deterministic dynamics of a Rayleigh gas where a tagged particle is undergoing hard-sphere collisions with heterogeneously distributed background particles, which do not interact among each other. The validity of the linear Boltzmann equation holds for arbitrary long times under moderate assumptions on spatial continuity and higher moments of the initial distributions of the tagged particle and the heterogeneous, non-equilibrium distribution of the background. The empiric particle dynamics are compared to the Boltzmann dynamics using evolution semigroups for Kolmogorov equations of associated probability measures on collision histories.
LanguageEnglish
Pages3299-3355
Number of pages57
JournalDiscrete and Continuous Dynamical Systems - Series A
Volume38
Issue number7
DOIs
StatusPublished - 1 Jul 2018

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Linear Boltzmann Equation
Boltzmann equation
Rayleigh
Tagged Particle
Collision
Ludwig Boltzmann
Evolution Semigroup
Gases
Kolmogorov Equation
Hard Spheres
Probability Measure
Non-equilibrium
Moment
Arbitrary
Operator
Gas
Background

Keywords

  • math.AP
  • math.DS

Cite this

Derivation of a Nonautonomous Linear Boltzmann Equation from a Heterogeneous Rayleigh Gas. / Matthies, Karsten; Stone, George.

In: Discrete and Continuous Dynamical Systems - Series A, Vol. 38, No. 7, 01.07.2018, p. 3299-3355.

Research output: Contribution to journalArticle

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