New version of hypersonic vehicle numerical simulation in direct simulation of Monte Carlo method of three dimensional flow in transitional regime

In this paper the hypersonic three dimensional flow by the direct simulation of monte carlo method were discussed. A new version of marking respectively the surface position elements and the space cells in hypersonic three dimensional flow by the DSMC method were developed. The transferring and storing of information between the surface position elements and the space cells had been implemented by judging the molecules collision with the surface. In particular, the new problems encountered in describing exactly the surface position element to calculate aerodynamic heating and pressure distribution in the DSMC method had been solved. The overall scheme and the implementation details had been suggested by us. A number of implementation issues had been tackled and discussed: the marking and Spotting of the surface position elements, the entering of the molecules and the judgment of their colliding with the surface position elements, the special demands raised by the calculation of local fluxes towards the simulation algorithm and the storing of information. The pressure and temperature of the flow field are studied. The analysis of simulation results confirms the validity of the suggested scheme and techniques.