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 a supersonic free jet and a steady vortex behind an inclined flat plate, and its effect is confirmed. The new collision scheme is also verified effective for unsteady flows such as vortex shedding.
