Development and Validation of an in-House Direct Simulation Monte Carlo Code for Supersonic Rarefied Gas Microflows

Abstract An in-house Direct Simulation Monte Carlo (DSMC) code has been developed using an object-oriented interface for the purpose of eventually modelling gas and plasma microflows in micromechanical systems, by coupling it with existing Particle-In-Cell (PIC) solver. The is validated canonical flow problems such as micro-Couette micro-Poiseuille flows. Since emphasis on supersonic highly compressible flows, we perform validation studies our algorithm high velocity Mach number cases, compared to known analytical or semi-analytical profiles via asymptotic Bhatnagar-Gross-Krook (BGK) Chapman-Enskog theory. Reasonably good agreement found all test which indicates reliability present rarefied Our results have implications future DSMC codes, where concrete quantitative theoretical experimental comparisons across different configurations are required.