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Surface pressure distribution in a binary particle system

Surface pressure distribution in a binary particle system

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Article
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In the study of gas-particulate multiphase systems, the flow of high-speed gas through a distribution of solid particulates is of utmost importance. While these aerodynamically interacting systems have been extensively studied for low-speed gas flows in the gas continuum regime, less attention has been given to high-speed systems where non-continuu...

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Conference Paper
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This study investigates the facility effects on gridded ion thrusters tested in ground vacuum chambers using a Multi-GPU PIC-DSMC solver, CHAOS. The research summarizes our recent work on contamination by backsputtered particles and the coupling between the electron source and chamber walls. These results indicate that different sputter models significantly impact backsputtering rates and that ground-based conditions alter electron temperatures and potentials compared to space conditions. In addition. dimensional scaling is applied to reduce computational costs for a vacuum chamber simulation, revealing that potential and electron energy are underestimated. These findings provide fundamental results useful for future numerical studies on facility effects.