A scalable parallel algorithm for the direct numerical simulation of three-dimensional incompressible particulate flow

Shi Jin*, Peter Minev, Krishnaswamy Nandakumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Particulate flow is of great importance from both the scientific and engineering points of view. Owing to the complexity of particle-flow interactions, direct numerical simulations (DNS) of inertial particulate flow with finite-size particles have been limited to a very small number of particles, while the industrial applications involve larger numbers with many orders of magnitude. This article presents a parallel implementation of a fictitious domain method for the DNS of particulate flows. The method is thoroughly tested and its parallel performance on distributed memory clusters is evaluated on a large-scale problem. Finally, we present the results for the separation of 21,336 particles of two different densities in a viscous fluid. Although there is still a significant gap between DNS and the industrial applications, the present algorithm allows to simulate significantly large number of particles so that a meaningful statistical analysis can be performed. This will help in the development of new closure relations for the averaged models of multiphase flows.

Original languageEnglish
Pages (from-to)427-437
Number of pages11
JournalInternational Journal of Computational Fluid Dynamics
Volume23
Issue number5
DOIs
StatePublished - Jun 2009
Externally publishedYes

Keywords

  • DNS
  • Multiphase flow
  • Parallel computing
  • Particulate flow
  • Unstructured grid domain decomposition

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