Numerical simulation of gas mixing in cross-flow

The time splitting explicit TVD MacCormack algorithm was used to solve the 2D Navier-Stokes equations coupled with species diffusion equations. The molecular and turbulent properties of viscosity, thermal conductivity and mass conductivity were calculated. In order to deal with the near wall separation of boundary layer, the low Reynolds number turbulence model, proposed by Lam and Bremhorst, was used to simulate the turbulent viscosity. The cross-flow on the plane plate, as an example, was used to test the reliability and accuracy of the method. The results have indicated that the method is effective for computation of supersonic flow field with gas mixing.