Spontaneous fluctuation power spectra in the hydrodynamic regime are obtained from DSMC simulations of a model gas with internal degrees of freedom. The simulated spectra are compared with the theoretical results derived from one-temperature and two-temperature hydrodynamic conservation equations. The comparison allows to establish the limitations of a bulk viscosity description of the internal energy relaxation kinetics.

A DSMC view of the problem of bulk viscosity in thermal nonequilibrium

Bruno D
2011

Abstract

Spontaneous fluctuation power spectra in the hydrodynamic regime are obtained from DSMC simulations of a model gas with internal degrees of freedom. The simulated spectra are compared with the theoretical results derived from one-temperature and two-temperature hydrodynamic conservation equations. The comparison allows to establish the limitations of a bulk viscosity description of the internal energy relaxation kinetics.
2011
978-0-7354-0889-0
Bulk viscosity
thermal relaxation
light scattering spectra
DSMC
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/374212
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