Simple theory of a blast wave for gases with the adiabatic index close to one

Details Simple theory of a blast wave for gases with the adiabatic index close to one Simple theory of a blast wave for gases with the adiabatic index close to one

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aps..dpp.rp197r&link_type=abstract

American Physical Society, 41st Annual Meeting of the Division of Plasma Physics, November 15-19, 1999 Seattle, WA, abstract #RP

Physics

Plasma Physics

Scientific paper

Blast waves from supernova explosions have been studied in a great deal of detail, both theoretically and numerically (e.g., [1, 2] and references therein). What we suggest in our paper, is a simple model, which provides new insights into the underlying physics; our model is also a convenient tool for quick assessments of experimental data. The model is based on the assumption that the adiabatic index is close to one. In this case, the gas swept by the blast wave forms a thin shell pushed from inside by the expanding gaseous blob. We discuss the following specific issues: 1) Early-time solution, for a moderate expansion of the initial blob; 2) The solution with fast radiation losses from the blob; 3) Blast wave in a medium with a radially varying density. 4) Transition from the a periodic instability of the blast wave to overstability. 5) Weakly-nonlinear stage of the instability. In our analysis we cover planar, cylindrical, and spherical geometries. 1. E.T. Vishniac. ApJ, v. 274, p. 152, 1983. 2. M.-M. Mac Low, M.L. Norman. ApJ, v. 407, p. 207, 1993.

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