Patched grid method and numerical simulation of complex flows

摘要

Patched grid technique is widely used in numerical simulation. In this paper, a new method to simulate flows with patched grids is introduced, it is based on second-order Godunov method and Euler equations, and conservation across patch boundaries are satisfied. Using the method, The supersonic flows of booster-rocket and complex flows between two objects are simulated. Computation results are in good agreement with experimental data, and describe complex flows rightly such as crossing and reflexing of shocks. The conservation method with patched grids in this paper based on second-order Gondunov method and Euler equations is an effective method for numerical simulation.