Underwater explosion whole flow field physical quantity calculation method based on compressible multiphase flow model

The invention relates to an underwater explosion whole flow field physical quantity calculation method based on a compressible multiphase flow model, and provides the following research scheme based on the underwater explosion problem in a complex environment of the compressible multiphase flow model. Comprising the steps that a compressible multiphase flow model is established, more accurate state equation SG-EOS parameters are applied, a three-dimensional structured Cartesian grid system is expanded, and a new immersion boundary method is put forward and applied to obtain the underwater explosion whole flow field physical quantity. According to the method, the new compressible multiphase flow model is established, higher-precision fitting of the parameters of the SG-EOS to the experimental result is determined, the computational domain is expanded to the complex underwater environment of any terrain in combination with the immersed boundary method IBM, the problem of underwater explosion in the complex unde