Parallel three-dimensional DSMC method using mesh refinement and variable time-step scheme

Jong-Shinn Wu*, Kun Chang Tseng, Fu Yuan Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Application of variable time-step and unstructured adaptive mesh refinement in parallel three-dimensional Direct Simulation Monte Carlo (DSMC) method is presented. A variable time-step method using the particle fluxes conservation (mass, momentum and energy) across the cell interface is implemented to reduce the number of simulated particles and the number of iterations of transient period towards steady state, without sacrificing the solution accuracy. In addition, a three-dimensional h-refined unstructured adaptive mesh with simple but effective mesh-quality control, obtained from a preliminary parallel DSMC simulation, is used to increase the accuracy of the DSMC solution. Completed code is then applied to compute several external and internal flows, and compared with previous results wherever available.

Original languageEnglish
Pages (from-to)166-187
Number of pages22
JournalComputer Physics Communications
Volume162
Issue number3
DOIs
StatePublished - 1 Oct 2004

Keywords

  • DSMC
  • Mesh-quality control
  • Monte Carlo method
  • Unstructured adaptive mesh refinement
  • Variable time-step

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