NORMAL IONIZING SHOCK WAVES,
COLUMBIA UNIV NEW YORK PLASMA LAB
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Solutions to the steady state jump equations are obtained for a normal ionizing shock wave moving into a nonconducting, stationary gas in an electromagnetic field. The properties of ionizing shock waves common to pure MHD and to ordinary gas shocks are discussed. Coupling between electromagnetic and dissociation-ionization effects across the shock is analyzed. Numerical solutions are presented for several electric field strengths in molecular hydrogen using accurate thermodynamic properties and assuming that the gas upstream and downstream from the shock is in chemical equilibrium. The steady state problem of a current-driven shock wave is solved in the context of an electromagnetic annular shock tube. The results agree well with experimental evidence. Evolutionary normal ionizing shock wave solutions are selected and their stability determined in perfect fluid. A theory of shock wave stability in a fully dissipative fluid, based on recent work in magnetohydrodynamics, is outlined.
- Plasma Physics and Magnetohydrodynamics