Disintegration and reformation of intermediate shock segments in 3D MHD bow shock flows

Details Disintegration and reformation of intermediate shock segments in 3D MHD bow shock flows Disintegration and reformation of intermediate shock segments in 3D MHD bow shock flows

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..537..232d&link_type=abstract

WAVES IN DUSTY, SOLAR, AND SPACE PLASMAS. AIP Conference Proceedings, Volume 537, pp. 232-239 (2000).

Computer Science

Magnetohydrodynamics And Plasmas, Magnetohydrodynamic Waves, Shock Waves And Discontinuities, Magnetohydrodynamic And Fluid Equation

Scientific paper

Recently it has been shown that for strong upstream magnetic field stationary three-dimensional (3D) magnetohydrodynamic (MHD) bow shock flows exhibit a complex double-front shock topology with particular segments of the shock fronts being of the intermediate MHD shock type. The large-scale stability of this new bow shock topology is investigated. It is found that large-amplitude perturbations may cause the disintegration of the intermediate shocks-which are indeed known to be unstable against perturbations with integrated amplitudes above critical values- but that in the driven bow shock problem there are always shock front segments where intermediate shocks are reformed dynamically, resulting in the reappearance of the new double-front topology. This shows that the new bow shock topology, and shock segments of intermediate type in general, may be found in MHD plasma flows even when there are large-amplitude perturbations. .

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