Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays

Avik Sarkar, Xin Sun, Sankaran Sundaresan

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

The accuracy of coarse-grid multiphase CFD simulations of fluidized beds may be improved via the inclusion of filtered constitutive models. In our previous study ( Sarkar et al., 2013 Chem. Eng. Sci., 104, pp. 399-412), we developed such a set of filtered drag relationships for beds with immersed arrays of cooling tubes. Verification of these filtered drag models is addressed in this work. Predictions from coarse-grid simulations with the sub-grid filtered corrections are compared against accurate, highly-resolved simulations of full-scale turbulent and bubbling fluidized beds. The filtered drag models offer a computationally efficient yet accurate alternative for obtaining macroscopic predictions, but the spatial resolution of meso-scale clustering heterogeneities is sacrificed.

Original languageEnglish (US)
Pages (from-to)144-154
Number of pages11
JournalChemical Engineering Science
Volume114
DOIs
StatePublished - Jul 26 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Keywords

  • Computational fluid dynamics (CFD)
  • Cylinder arrays
  • Filtered models
  • Fluidization
  • Multiphase flow
  • Scale-up

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