Abstract
The new intermolecular collision scheme is developed to obtain an excellent result even if cells are lengthened in the DSMC calculation. In the new scheme, the velocity of one molecule of a collision pair is modified before and after a conventional collision calculation, assuming that velocity distributions in all flowfield are in local equilibrium with some temperature and flow velocity. The new collision scheme is applied to an one-dimensional normal shock wave, a two-dimensional vortex in a square cavity, an axisymmetric supersonic free jet, and a three-dimensional supersonic jet, respectively, and its effect is confirmed.
