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Dissipative mass flux and sound wave propagations in monatomic gases

Dadzie, Kokou and Reese, Jason (2011) Dissipative mass flux and sound wave propagations in monatomic gases. In: Rarefied gas dynamics. AIP Conference Proceedings, 1333 (1st). Springer, pp. 655-660. ISBN 9780735408890

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    Abstract

    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.

    Item type: Book Section
    ID code: 32103
    Keywords: sound wave propagation, non-equilibrium gas dynamics, mass diffusion, gas kinetic theory, continuum fluid mechanics, Mechanical engineering and machinery, Physics
    Subjects: Technology > Mechanical engineering and machinery
    Science > Physics
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
    Technology and Innovation Centre > Advanced Engineering and Manufacturing
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    Depositing user: Pure Administrator
    Date Deposited: 13 Jul 2011 10:02
    Last modified: 14 Jun 2013 19:36
    URI: http://strathprints.strath.ac.uk/id/eprint/32103

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