NONEQUILIBRIUM STRUCTURE OF HYDROMAGNETIC GAS-IONIZATING SHOCK FRONTS IN ARGON
POLYTECHNIC INST OF BROOKLYN NY DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS
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A low temperature collisionally-ionizing shock with oblique magnetic field is studied to determine whether certain concepts which exist in the current literature are relevant. Nondimensionalized equations governing the nonequilibrium structure of such a front propagating into un-ionized argon are formulated using ionization rates and an electron energy equation. Comparison of the magnitudes of viscous and magnetic Reynolds numbers within this front indicates that, if a structure exists, it must consist of a narrow imbedded viscous shock standing upstream of a much wider hydromagnetic interaction and ionization relaxation zone. Hence, a modified form of the Zeldovich-von Neumann-Doring ZND approximation is applicable to the structure problem. It is shown that in this approximation nontrival steady-state structures cannot be constructed for fast gas-ionizing shocks. On the other hand, solutions are possible for slow waves.
- Plasma Physics and Magnetohydrodynamics