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Dynamic selection limiter schemes for high density gradient simulations of supersonic rarefied gas flows
Author(s) -
Groll Rodion
Publication year - 2019
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201900199
Subject(s) - limiter , rarefaction (ecology) , collision , supersonic speed , mechanics , flow (mathematics) , thrust , physics , grid , mach number , propulsion , selection (genetic algorithm) , statistical physics , computer science , aerospace engineering , mathematics , geometry , engineering , thermodynamics , geology , telecommunications , paleontology , computer security , species richness , artificial intelligence
For modelling thrust and efficiency of micro propulsion sytems standard DSMC methods with static collision limiter schemes do not differentiate between regions with varying degrees of flow rarefaction and different DSMC particle densities. The discrete influence of multi‐level grid coarsening and different elongations of the numerical time step on the quality of predicted flow quantities show the advateges of the dynamic collision limitation.