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- W2155201595 abstract "One main factor governing overall accuracy of Direct Simulation Monte Carlo (DSMC) calculations is the separation between particle pairs during binary collision operations. In many DSMC applications, the dependence of simulation accuracy on collision separation may be quantified through the ratio of the mean collision separation (MCS) in some principle direction to the local mean free path . This principle direction is aligned with flowfield gradients, and should, for example, be normal to the surface within boundary layer regions. In this work, a set of new techniques for collision partner selection are proposed in order to efficiently reduce unidirectional MCS/ relative to existing selection schemes. Accuracy and efficiency of the new techniques are assessed through comparison with several existing techniques, for a representative hypersonic flow over a forward facing step. Particularly favorable qualities are demonstrated for a scheme which involves gradient aligned ordering of particle information arrays through quicksort operations." @default.
- W2155201595 created "2016-06-24" @default.
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- W2155201595 date "2011-06-14" @default.
- W2155201595 modified "2023-09-24" @default.
- W2155201595 title "Techniques for Reducing Collision Separation in Direct Simulation Monte Carlo Calculations" @default.
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- W2155201595 doi "https://doi.org/10.2514/6.2011-3312" @default.
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