Abstract

The purpose of this note is to show that the combination of implicit radiation transport and hydrodynamics, Compton scattering, and any other energy transport or exchange mechanism can be simply carried out by a splitting procedure. This means that the contributions to material energy exchange can be reckoned separately for hydrodynamics, radiation transport without scattering, Compton scattering, plus any other possible energy exchange mechanism. The radiation transport phase of the calculation would of course be implicit and would be carried out in exactly the manner described in UCRL-7294 but the hydrodynamics and Compton portions would not, leading to possible time step controls. In any case, the time step restrictions which occur on radiation transfer due to large Planck mean absorption cross-sections would not occur.

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