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Abstract
Predicting sound wave dispersion in monatomic gases is a fundamental gas flow problem in rarefied gas dynamics. The NavierStokesFourier model is known to fail where local thermodynamic equilibrium breaks down. Generally, conventional gas flow models involve equations for massdensity without a dissipative mass contribution. In this paper we observe that using a dissipative mass flux contribution as a nonlocalequilibrium 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 language  English 

Title of host publication  Rarefied gas dynamics 
Editors  D.A Levin, I.J Wysong, A.L Garcia, H Abarbanel 
Publisher  Springer 
Pages  655660 
Number of pages  5 
Volume  1333 
Edition  1st 
ISBN (Print)  9780735408890 
Publication status  Published  28 Jun 2011 
Publication series
Name  AIP Conference Proceedings 

Publisher  Springer 
Volume  1333 
ISSN (Print)  0094243X 
Keywords
 sound wave propagation
 nonequilibrium gas dynamics
 mass diffusion
 gas kinetic theory
 continuum fluid mechanics
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Dive into the research topics of 'Dissipative mass flux and sound wave propagations in monatomic gases'. Together they form a unique fingerprint.Projects
 1 Finished

BEYOND NAVIERSTOKES: MEETING THE CHALLENGE OF NONEQUILIBRIUM GAS DYNAMICS
Reese, J. & McInnes, C.
EPSRC (Engineering and Physical Sciences Research Council)
1/10/05 → 31/01/10
Project: Research