TITLE

Reversal of Hugoniot locus for strong shocks due to radiation

AUTHOR(S)
Li, Jiwei; Li, Jinghong; Meng, Guangwei
PUB. DATE
April 2011
SOURCE
Physics of Plasmas;Apr2011, Vol. 18 Issue 4, p042301
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Shock Hugoniot can be used to express the response of a material to shocks, and the compression ratio of the shock can be determined by the Hugoiot locus. When the shock is strong, it will become radiating, and the radiation will affect the Hugoniot. The role of radiation on the Hugoniot condition is studied in the paper. For the radiative flux-dominated shocks, the radiative flux if large enough may render the structure of the shock Hugoniot locus totally different with the case for the pure hydrodynamic shock: the two branches with one in quadrant I and the other in quadrant III are reversed into two in quadrants IV and II, respectively, correspondingly the compression ratio may be larger than the limiting value (γ+1)/(γ-1) for ideal gases with index γ. For the radiative shock in which the radiative heat wave propagates supersonically, a threshold value for the net radiative flux to the preshock is also defined which determines whether the Hugoniot locus is reversed and the compression ratio exceeds the limiting value. Numerical results also verify the reversal of the Hugoniot locus of the shocks if the net radiative flux to the preshock exceeds the threshold value.
ACCESSION #
60313484

 

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