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Shock wave structure for a fully ionized plasma

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Abstract

We study planar shock wave structure in a two-temperature model of a fully ionized plasma that includes electron heat conduction and energy exchange between electrons and ions. For steady flow in a reference frame moving with the shock, the model reduces to an autonomous system of ordinary differential equations which can be numerically integrated. A phase space analysis of the differential equations provides an additional insight into the structure of the solutions. For example, below a threshold Mach number, the model produces continuous solutions, while above another threshold Mach number, the solutions contain embedded hydrodynamic shocks. Between the threshold values, the appearance of embedded shocks depends on the electron diffusivity and the electron–ion coupling term. We also find that the ion temperature may achieve a maximum value between the upstream and downstream states and away from the embedded shock. We summarize the methodology for solving for two-temperature shocks and show results for several values of shock strength and plasma parameters in order to quantify the shock structure and explore the range of possible solutions. Such solutions may be used to verify hydrodynamic codes that use similar plasma physics models.

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Authors and Affiliations

  1. Computational Physics and Methods (CCS-2), Los Alamos National Laboratory, Mail Stop D413, P.O. Box 1663, Los Alamos, NM, 87545, USA

    T. O. Masser, J. G. Wohlbier & R. B. Lowrie

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  1. T. O. Masser
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  2. J. G. Wohlbier
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  3. R. B. Lowrie
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Correspondence to T. O. Masser.

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Communicated by D. Zeitoun.

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Masser, T.O., Wohlbier, J.G. & Lowrie, R.B. Shock wave structure for a fully ionized plasma. Shock Waves 21, 367–381 (2011). https://doi.org/10.1007/s00193-011-0313-3

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  • DOI: https://doi.org/10.1007/s00193-011-0313-3

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