Numerical schemes of intensive blast wave propagation in large scale complex enviroments

A compressible multiphase flow numerical scheme, induced from the multi- component diffuse interface model with arbitrary number of materials, is established to simulate the interaction between distinct materials under extreme conditions. A robust, low dissipation and high efficiency reconstruction method, the MUSCL-THINC-BVD, is proposed with the aid of artificial intelligence technology, which can adaptively select the most suitable reconstruction method in the essential regions such as shock wave, contact discontinuity and material interface, and can achieve the minimum global numerical dissipation. Furthermore, it has a higher computational efficiency than the traditional BVD scheme. The automatic geometric modeling and grid meshing based on global geographic information system (GIS), adaptive mesh refinement and large-scale parallel computing method are established to realize the whole numerical simulation of shock wave propagation in complex terrain and real urban environments. Several numerical applications, such as the propagation of intensive blast wave in complicated terrain and local urban environments, are finished, to validate our numerical schemes.