Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1772322 | High Energy Density Physics | 2015 | 5 Pages |
Semi-analytic lab-frame radiative shock solutions have been presented recently, wherein the radiation is modeled with either grey (frequency independent) nonequilibrium-diffusion or grey Sn-transport. As a first step toward incorporating frequency dependence, we retain grey cross-sections such that the frequency dependence of the problem is strictly due to the Planck function. By using multigroup frequency integration the frequency-dependent radiation-transport equation may be solved, and group-dependent radiation temperatures may be defined for each group. Our main result is: When a Zel'dovich temperature spike exists in a radiative shock solution, there exists a transition group gTgT, such that for all frequency groups below gT the group-dependent radiation temperatures are spatially monotonic, and for all frequency groups above gT the group-dependent radiation temperatures are spatially non-monotonic. We present numerical evidence of our claim and make no claim as to the monotonicity of group gT.