Abstract

Shape effects of a granular particle in free molecular gas flow regime are investigated using an in-house, multi-species, parallel, three dimensional Direct Simulation Monte-Carlo solver. The same is modified to study free molecular gas flows and validated against the analytical results for a spherical particle. Properties like drag and heat transfer coefficient are considered for comparison. The effect of particle shape on the properties like speed and temperature is qualitatively discussed and quantified through a comprehensive analysis taking care of lift, pitching moment, particle rotation and the associated resistive torque. Non-spherical particle relaxation is simulated by incorporating particle rotation about the lateral axis.

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