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1 results

  • Self-organization of collisionless shocks: a ‘phase transition’ from a planar stationary profile to a rippled structure

  • Michael Gedalin
  • Journal:
    Journal of Plasma Physics / Volume 91 / Issue 1 / February 2025
    Published online by Cambridge University Press:
    03 January 2025, E6
    • Article
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  • It is common wisdom that collisionless shocks become non-planar and non-stationary at sufficiently high Mach numbers. Whatever the shock structure, the upstream and downstream fluxes of the mass, momentum and energy should be equal. At low Mach numbers, these conservation laws are satisfied when the shock front is planar and stationary. When this becomes impossible, inhomogeneity and time dependence, presumably in the form of rippling, develop. In this study, we show that the shock structure changes as a kind of ‘phase transition’ when the Mach number is increased while other shock parameters are kept constant.