Piecewise continuous distribution function method and ultrasound at half space

Details Piecewise continuous distribution function method and ultrasound at half space Piecewise continuous distribution function method and ultrasound at half space

2006-02-03

arxiv.org/abs/physics/0602024v1

Physics

Atmospheric and Oceanic Physics

9 pages, 2 figures

Scientific paper

The system of hydrodynamic-type equations, derived by two-side distribution function for a stratified gas in gravity field is applied to a problem of ultrasound propagation and attenuation. The background state and linearized version of the obtained system is studied and compared with the Navier-Stokes one at arbitrary Knudsen numbers. The WKB solutions for ultrasound in a stratified medium are constructed in explicit form. The problem of a generation by a moving plane in a rarefied gas is explored and used as a test while compared with experiment.

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