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

J. K.J. Hew, R. W. Boswell

Research output: Contribution to journalConference articlepeer-review

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 an existing Particle-In-Cell (PIC) solver. The code is validated with canonical flow problems such as the micro-Couette and micro-Poiseuille flows. Since the emphasis is on supersonic and highly compressible flows, we perform validation studies of our algorithm for high velocity and Mach number cases, as compared to known analytical or semi-analytical profiles via asymptotic Bhatnagar-Gross-Krook (BGK) and Chapman-Enskog theory. Reasonably good agreement is found for all the test cases, which indicates the reliability of the present algorithm for modelling supersonic rarefied gas flows. Our results have implications for future validation studies of DSMC codes, where concrete quantitative theoretical and experimental comparisons across different flow configurations are required.

Original languageEnglish
Article number012009
JournalJournal of Physics: Conference Series
Volume2542
Issue number1
DOIs
Publication statusPublished - 2023
Event2023 7th International Conference on Mechanical, Aeronautical and Automotive Engineering, ICMAA 2023 - Virtual, Online
Duration: 24 Feb 202326 Feb 2023

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