On the accuracy of the simplified Bernoulli trials collision algorithm in treating flows at nano scale and hypersonic regime

This paper reviews the accuracy of the Simplified Bernoulli Trial (SBT) algorithm and its variants, i.e., SBT-TAS (SBT on transient adaptive subcells) and ISBT (intelligence SBT) in the simulation of a wide spectrum of rarefied flow problems, including collision frequency ratio evaluation in the equ...

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Bibliographic Details
Main Authors: Roohi, Ehsan, Stefanov, Stefan
Format: Conference Proceeding
Language:English
Subjects:
Algorithms
Computer simulation
Cylinders
Direct simulation Monte Carlo method
Heat flux
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Summary:This paper reviews the accuracy of the Simplified Bernoulli Trial (SBT) algorithm and its variants, i.e., SBT-TAS (SBT on transient adaptive subcells) and ISBT (intelligence SBT) in the simulation of a wide spectrum of rarefied flow problems, including collision frequency ratio evaluation in the equilibrium condition, comparison of the Sonine-polynomial coefficients prediction in the Fourier flow with the theoretical prediction of the Chapman-Enskog expansion, accurate wall heat flux solution for the Fourier flow in the early slip regime, and hypersonic flows over cylinder and biconic geometries. We summarize advantages and requirements that utilization of the SBT collision families brings to a typical DSMC solver.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4967610