Non-Equilibrium Sound Propagation in Discrete Velocity Models

Rainer Kwang Hua Chu, Yitshak Zohar

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Discrete velocity models developed by Gatignol are used to study the propagation properties of one-dimensional, plane sound waves in monatomic gases, which is fundamental in Rarefied Gases Dynamics and Nonequilibrium Thermodynamics. The governing equations for 4-, 6- and 8-velocity models are first linearized around a uniform state. Then, plane-wave solutions are found where the sound dispersion and attenuation are determined. The results show that only the 4-velocity model properly predicts the propagation of sound waves in the high Knudsen number regime in comparison with experimental data.

Original languageEnglish (US)
Pages (from-to)195-202
Number of pages8
JournalJournal of Non-Equilibrium Thermodynamics
Issue number3
StatePublished - 1998

ASJC Scopus subject areas

  • General Chemistry
  • General Physics and Astronomy


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