A Lagrangian modeling approach with the direct simulation Monte-Carlo method for inter-particle collisions in turbulent flow

Chih Hung Hsu, Keh Chin Chang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A Lagrangian modeling approach, which combines the direct simulation Monte-Carlo (DSMC) method and a Reynolds-averaged Navier-Stokes model to account for inter-particle collisions and turbulence characteristics of the carrier fluid, respectively, is proposed. The wall-bounded turbulent particle-laden flows in which the experimental data are available are chosen as the test problems for demonstration. Results obtained with the deterministic method accounting for interparticle collisions are used as a basis for validating the proposed stochastic Lagrangian model. Good agreement between the predictions obtained separately with the deterministic and DSMC methods is achieved. The benefit of saving computational expenditure when using the DSMC method becomes more remarkable than the deterministic method as the number of particles loaded in the flow is increased. In addition, the study demonstrates that τP/τC is a proper parameter to monitor the role of inter-particle collisions in the physical processes of particle-laden flows.

Original languageEnglish
Pages (from-to)395-426
Number of pages32
JournalAdvanced Powder Technology
Volume18
Issue number4
DOIs
Publication statusPublished - 2007 Jul 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanics of Materials

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