Filtered two-fluid models for fluidized gas-particle suspensions

Yesim Igci, Arthur T. Andrews IV, Sankaran Sundaresan, Sreekanth Pannala, Thomas O'Brien

Research output: Contribution to journalArticlepeer-review

383 Scopus citations


Starting from a kinetic theory based two-fluid model for gas-particle flows, we first construct filtered two-fluid model equations that average over small scale inhomogeneities that we do not wish to resolve in numerical simulations. We then outline a procedure to extract constitutive models for these filtered two-fluid models through highly resolved simulations of the kinetic theory based model equations in periodic domains. Two- and three-dimensional simulations show that the closure relations for the filtered two-fluid models manifest a definite and systematic dependence on the filter size. Linear stability analysis of the filtered two-fluid model equations reveals that filtering does indeed remove small scale structures that are afforded by the microscopic two-fluid model.

Original languageEnglish (US)
Pages (from-to)1431-1448
Number of pages18
JournalAIChE Journal
Issue number6
StatePublished - Jun 2008

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)


  • Circulating fluidized beds
  • Computational fluid dynamics (cfd)
  • Fluid mechanics
  • Fluidization
  • Particle technology


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