In order to improve robustness of multi-fluid-channel scheme on average of volume (MFCAV) and overcome its artificial intervention in actual application, a new HLLCM scheme was designed on a moving mesh, which restrains non-physical mesh tangling without artificial intervention. Numerical results show that the HLLCM scheme maintains one-dimensional spherical symmetry on equal-angle-zoned grids which has better numerical effects in keeping mesh quality and energy conservation in complex applications than MFCAV scheme.

Invariable processor in a minimum federal algorithm is applied to RHSn2D program,which is a multi-physics composition program such as radiation hydrodynamics and particle transport based on parallel software infrastructure JASMIN. With improvement of parallel algorithm,RHSn2D program achieves parallel efficiency of 16% with 8192 processors for real models. Time analysis of integrated program demonstrates that perfermance of MPI collective communications in parallel software infrastructure decides computing time of radiation hydrodynamics with parallel algorithm.

With support of Federation Computing in JASMIN,two serial codes named radiation hydrodynamics code RH2D and particle transport code Sn2D as Federal members are concatenated to an integrated program RHSn2D,which uses efficiently thousands of processors to simulate a multiphysics composition system.Federal members of RHSn2D have mesh patches and parallel algorithms respectively,encapsulating parallel communication between them based on JASMIN.For a typical model discretized by 90 720 meshes,100 patches in RH2D,2 835 patches in Sn2D,48 directions and 16 energy groups,it shows that the integrated program RHSn2D achieves parallel efficiency of 36% with 1 024 processors.