Numerical simulation of fluid and compressible solid coupling using Modified Ghost Fluid Method and Hydro-Elasto-Plastic equation of state

摘要

This paper presents numerical simulation of fluid and compressible solid coupling by Modified Ghost Fluid Method (MGFM) and Hydro-Elasto-Plastic equation of state (HEP EOS). The solid is considered as compressible under strong shock wave impacting thereby HEP EOS can be employed for solid. Both fluid and solid are solved by Euler equations with fifth order WENO spatial discretization and second order Runge-Kutta time discretization. The grid nodes bordering fluid-solid interface are updated by MGFM algorithm. Isentropic one-fluid model is employed when cavitation flows is occurring. Numerical results and theoretical analysis are presented for further comparison and discussion.