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The boltzmann equation over ℝD: Dispersion versus dissipation

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The Boltzmann equation of the kinetic theory of gases involves two competing processes. Dissipation—or entropy production—due to the collisions between gas molecules drives the gas towards local thermodynamic (Maxwellian) equilibrium. If the spatial domain is the Euclidean space ℝD, the ballistic transport of gas molecules between collisions results in a dispersion effect which enhances the rarefaction of the gas, and offsets the effect of dissipation. The competition between these two effects leads to a scattering regime for the Boltzmann equation over ℝD with molecular interaction satisfyingGrad’s angular cutoff assumption. The present paper reports on results in this direction obtained in collaboration with Bardos, Gamba and Levermore [arxiv:1409.1430] and discusses a fewopen questions related to thiswork.

Original languageEnglish
Title of host publicationFrom Particle Systems to Partial Differential Equations III
Subtitle of host publicationParticle Systems and PDEs III
EditorsPatrícia Gonçalves, Ana Jacinta Soares
PublisherSpringer New York LLC
Pages145-166
Number of pages22
ISBN (Print)9783319321424
DOIs
Publication statusPublished - 1 Jan 2016
Event3rd International conference on particle systems and partial differential equations, PS-PDEs 2014 - Braga, Portugal
Duration: 17 Dec 201419 Dec 2014

Publication series

NameSpringer Proceedings in Mathematics and Statistics
Volume162
ISSN (Print)2194-1009
ISSN (Electronic)2194-1017

Conference

Conference3rd International conference on particle systems and partial differential equations, PS-PDEs 2014
Country/TerritoryPortugal
CityBraga
Period17/12/1419/12/14

Keywords

  • Boltzmann H Theorem
  • Boltzmann collision integral
  • Boltzmann equation
  • Free transport
  • Global maxwellian
  • Large time limit
  • Scattering operator

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