Some difficulties are analyzed for solving problems of multigroup radiation transfer coupled with material,and an artificial-scattering iteration method is presented by splitting electron energy equation into two equations.The computing method is described and compared with other method.Numerical examples are given.

The hydrodynamic surface instabilities driven by X-ray ablation in Inertial Confinement Fusion(CIF)have been analyzed,and the role of Raleigh-Taylor(RT) instabilities in CIF has been also discussed.Based on one dimension numerical computational results,according to the formula of net growth factor at the ablation surface,the net growth rates of RT instabilities have been estimated.Finally,some recommendations for instability experiment are proposed.

Based on a simplified physics model a numerical method is proposed for calculating 3-D radiation field of cavity and the convergence of iteration procedure used is discussed.In order to illustrate that the method is feasible and effective,some numerical examples are given as well.

This paper presents a variable multigroup method for calculation in non-equilibrium radiative transfer considered atomic line cross section shift. The use of this method coupling with the conventional multigroup method is descrived and compared with the latter for simple example.