THE TREATMENT OF MOLECULAR-COLLISIONS IN DSMC METHODS

We describe Direct Simulation Monte Carlo (DSMC) methods which model s ystems under low pressure with emphasis on the treatment of molecular collisions in DSMC methods. According to the treatment of molecular co llisions, several variants of DSMC methods can be distinguished. This work compares some versions of DSMC methods (Bird's time counter, no t ime counter, Babovsky's, Nanbu's, Koura's null collision technique. Ya nitskiy's, Abe's and direct (Kac's) methods).