Large-scale parallel grid generation method and system suitable for numerical reactor

The invention provides a large-scale parallel grid generation method and system suitable for a numerical reactor. The method comprises: a grid unit construction method based on lockless atomic operation, which is used for improving the construction efficiency of a multi-thread grid, and avoiding the blocking and waiting of threads; a parallel grid conversion method based on an OpenMP framework, which is used for accelerating a grid conversion process and shortening grid conversion time. and a grid generator and solver integration method which is used for avoiding I/O duration of writing and reading of a grid file. The huge requirement for large-scale parallel grid generation is met, a user can obtain the grid of the specified scale in a shorter time, and good grid quality can be guaranteed. According to the scheme of integrating the grid generator and the solver provided by the invention, an integral numerical simulation framework can be formed, the use cost of a user is reduced, and the grid generation time