Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.102..277r&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 102, no. 2, July 1984, p. 277-286.
Astronomy and Astrophysics
Astrophysics
Discontinuity, Magnetohydrodynamic Flow, Magnetohydrodynamic Waves, Radiative Heat Transfer, Gas Dynamics, High Temperature Gases, Thermal Radiation, Three Dimensional Flow, Wave Propagation
Scientific paper
The growth of MHD discontinuities in a radiation-induced flow field at very high temperature is studied. The growth and decay properties of the weak MHD discontinuities are discussed in terms of the influences of a time-dependent gasdynamic field, a radiation field, and a magnetic field with finite electrical conductivity. The effects of thermal radiation and conduction on the global behavior of the discontinuities is analyzed under a quasi-equilibrium and quasi-isotropic hypothesis concerning the differential approximation to a radiative heat transfer equation. It is shown that the time-dependent radiation field gives rise to a radiation-induced wave which has a small effect on the nonrelativistic flow properties of the gasdynamic field. Radiation stresses resist the steepening tendency of a compressive weak wave and stabilize it, whereas thermal conduction effects tend to destabilize the wave. The cases of diverging and converging waves are considered separately in order to determine when a shock discontinuity or a caustic will be formed or disallowed under curvature effects.
Rai Ashutosh
Ram R.
Upadhyay R. P.
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