Physics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9518809t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Nov. 1, 1990, p. 18809-18819. Research supported by DOE, NASA and DNA
Physics
54
Bow Waves, One Dimensional Flow, Shock Wave Propagation, Supercritical Flow, Two Dimensional Flow, Shock Wave Interaction, Space Plasmas
Scientific paper
The process of reforming supercritical quasi-parallel shocks is investigated using one-dimensional and two-dimensional hybrid (particle ion, massless fluid electron) simulations both of shocks and of simpler two-stream interactions. It is found that the supercritical quasi-parallel shock is not steady. Instread of a well-defined shock ramp between upstream and downstream states that remains at a fixed position in the flow, the ramp periodically steepens, broadens, and then reforms upstream of its former position. It is concluded that the wave generation process is localized at the shock ramp and that the reformation process proceeds in the absence of upstream perturbations intersecting the shock.
Omidi Nojan
Thomas Anne V.
Winske Dan
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