Simulation Of Air Flow And Thermal Radiation Using Direct Simulation Of Monte Carlo Method

The direct simulation Monte-Carlo (DSMC) method was rapidly developed fast development of computer science in recent years.DSMC is an efficient tool in engineering implication for rarefied gas nonequlibrium flow. Based on the Molecular gas dynamics, DSMC simulates the physical procedure of Boltzmann equation from the microscopic aspect, therefore it can well solve the problem of dilute gas flow with thermochemical nonequlibrium reaction and heat radiation. The method has been used widely in the subject of gas dynamics .In this paper, the variable hard sphere (VHS) model and the Larsen-Borgnakke model is employed to simulate the cylindrical flow, the tempture, density, pressure of the flow field are obtained in the example of cylindrical flow. By the simulation of one dimention shock wave, we get the position and the length of the shock wave.Employing the TCE chemical reactions model developed by Bird,the wedge flow is simulated in different angels and some useful results are obtained.In these basises, the radiation absorb, emit coefficients in the flow field are calculated by the theories of atom and molecule radiation.The results make a firm basis for the further solving the problem of high-tempture non equilibrium flow and thermal radiation couple.At last,the direct simulation Monte Carlo method with nonequilibrium chemically reations and have been performed respectively and the comparative study has been made.The important part is explained.