Abstract: A unified mesh vertex indexing method for high-fidelity parallel full-core fast reactor simulation belongs to the fields of high performance computing and numerical simulation. Firstly, a constant is defined and a message passing interface (MPI) is initialized; processors then generate local hash tables concurrently to obtain local vertex numbers; next, a processor 0 generates a global hash table by MPI_Send( ) and MPI_Recv( ) functions, processes a conflict, and finally obtains global vertex numbers, thus building indexes. Local numbering and global numbering of mesh vertexes are realized with the hash table. Parallel processing of vertex numbering tasks of the processors is realized through the MPI. An innovative global vertex numbering method is provided for the processors. Large-scale parallel efficiency is improved. The research and development of large-scale high-fidelity numerical simulation software for a thermal fluid can be facilitated.

Abstract: There is provided a method of tracking a characteristic line, a method and apparatus of calculating core neutron physics, and a computer-readable storage medium. The method of tracking the characteristic line includes: determining, sequentially from the uppermost level to the lowest level, whether an intersection of the sub-model meeting a first preset condition in each of the plurality of levels and the characteristic line segment meets a second preset condition or not; and obtaining an intersection, that meets the second preset condition, of the sub-model meeting the first preset condition in the lowest level and the characteristic line, so as to obtain a segment correspondence between the characteristic line and the material of the core according to the intersection obtained.