Implementation of heat flux specified boundary conditions in DSMC method

The statistical method in DSMC method for the fluid temperature, energy and boundary heat flux is discussed. An Inverse Temperature Sampling algorithm, with which the reflected velocity of the molecules colliding with wall could be calculated from boundary heat flux, is proposed. Further, an implemental method under heat flux specified boundary conditions in DSMC is developed. The numerical results show that the proposed algorithm could accurately sample the characteristic temperature of the reflected molecules, and the reflected velocity could be obtained accordingly. The temperature distribution at wall boundary as well as the pressure and velocity of the fluid can be accurately calculated by means of implementation of heat flux specified boundary conditions based on ITS method.