Development of a Compressible Flow Analysis Code with a Generalized Equation of State

This paper describes outline and numerical results of a three-dimensional compressible flow analysis code, MIFS. MIFS is a multi-block BFC general-purpose code that can solve flows in complicated geometries. The complicated flow field is divided into small blocks that have rather simpler geometries and are easy to generate structured boundary-fitted-coordinate system grids. It employs a generalized equation of state so as to solve a wide range of hydrodynamic problems, such as the super-cavitation problems as well as the usual aerodynamic problems in the same solving procedure. The generalized equation of state consists of the ideal gas equation for gas-phase and a Tammann type equation for liquid-phase. These two equations of state are combined by a physical parameter, the mass ratio of gas.