Dissipative mass flux and sound wave propagations in monatomic gases

Kokou Dadzie, Jason Reese

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)
116 Downloads (Pure)


Predicting sound wave dispersion in monatomic gases is a fundamental gas flow problem in rarefied gas dynamics. The Navier-Stokes-Fourier model is known to fail where local thermodynamic equilibrium breaks down. Generally, conventional gas flow models involve equations for mass-density without a dissipative mass contribution. In this paper we observe that using a dissipative mass flux contribution as a non-local-equilibrium correction can improve agreement between the continuum equation prediction of sound wave dispersion and experimental data. Two mass dissipation models are investigated: a preliminary model that simply incorporates a diffusive density term in the set of three conservation equations, and another model derived from considering microscopic fluctuations in molecular spatial distributions.
Original languageEnglish
Title of host publicationRarefied gas dynamics
EditorsD.A Levin, I.J Wysong, A.L Garcia, H Abarbanel
Number of pages5
ISBN (Print)9780735408890
Publication statusPublished - 28 Jun 2011

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X


  • sound wave propagation
  • non-equilibrium gas dynamics
  • mass diffusion
  • gas kinetic theory
  • continuum fluid mechanics


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