Waves in strong centrifugal field: dissipative gas

In the fast rotating gas (with the velocity typical for Iguassu gas centrifuge), three families of linear waves exist with different polarizations and law of dispersion. The energy of the waves is basically concentrated at the axis of rotation in the rarefied region. Therefore, these waves decay on...

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Bibliographic Details
Published in:Theoretical and computational fluid dynamics 2019-02, Vol.33 (1), p.21-35
Main Authors: Bogovalov, S. V., Kislov, V. A., Tronin, I. V.
Format: Article
Language:English
Subjects:
Axes of rotation
Centrifuges
Classical and Continuum Physics
Computational Science and Engineering
Damping
Dispersion
Engineering
Engineering Fluid Dynamics
Flow (Dynamics)
Flux density
Gas centrifuges
Heat conduction
Laws, regulations and rules
Linear waves
Molecular viscosity
Natural gas fields
Original Article
Physics
Rotation
Sound waves
Thermal conductivity
Viscosity
Wave propagation
Wavelength
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Summary:In the fast rotating gas (with the velocity typical for Iguassu gas centrifuge), three families of linear waves exist with different polarizations and law of dispersion. The energy of the waves is basically concentrated at the axis of rotation in the rarefied region. Therefore, these waves decay on the distance comparable with the wavelength. There is only one type of waves propagating strictly along the axis of rotation with the law of dispersion similar to ordinary acoustic waves. These waves are interested for the physics of gas centrifuges. The energy density of these waves concentrates at the wall of the rotor. These waves have weak damping due to the molecular viscosity and heat conductivity. The damping coefficient is determined for this type of waves by numerical calculations. Analytical approximations for the damping coefficient are defined as well. At the parameters typical for the Iguassu centrifuge, the damping is defined by interaction of the waves with the rotor wall.
ISSN:0935-4964
1432-2250
DOI:10.1007/s00162-018-0481-1