Verification study of anisotropic filtered Two Fluid Model closures

Jan Hendrik Cloete, Schalk Cloete, Stefan Radl, Shahriar Amini

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

This study presents a comparison of isotropic and anisotropic filtered Two Fluid Model (fTFM) closures for drag and mesoscale solids stresses. Anisotropic modelling of drag is important to correctly predict the drag correction in directions not aligned with gravity, while anisotropic stress modelling predicts the deviatoric component of the mesoscale stress tensor with much higher accuracy than closures based on the conventionally employed Boussinesq approximation. Comparisons to a highly computationally expensive resolved simulation showed that the anisotropic stress model had the largest positive effect on model accuracy. Clear improvements relative to the isotropic model were observed for all flow variables, including reaction rates. Anisotropic drag modelling had a smaller, albeit still significant effect. In general, the good performance of the newly proposed anisotropic fTFM closures observed in this study serves as a clear recommendation for future study in this direction.

Original languageEnglish
Title of host publicationParticle Technology Forum 2017 - Core Programming Area at the 2017 AIChE Annual Meeting
PublisherAmerican Institute of Chemical Engineers
Pages472-493
Number of pages22
ISBN (Electronic)9781510857926
Publication statusPublished - 1 Jan 2017
EventParticle Technology Forum 2017 - Core Programming Area at the 2017 AIChE Annual Meeting - Minneapolis, United States
Duration: 29 Oct 20173 Nov 2017

Publication series

NameParticle Technology Forum 2017 - Core Programming Area at the 2017 AIChE Annual Meeting
Volume2017-October

Conference

ConferenceParticle Technology Forum 2017 - Core Programming Area at the 2017 AIChE Annual Meeting
CountryUnited States
CityMinneapolis
Period29/10/173/11/17

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Engineering(all)
  • Materials Chemistry

Cite this

Cloete, J. H., Cloete, S., Radl, S., & Amini, S. (2017). Verification study of anisotropic filtered Two Fluid Model closures. In Particle Technology Forum 2017 - Core Programming Area at the 2017 AIChE Annual Meeting (pp. 472-493). (Particle Technology Forum 2017 - Core Programming Area at the 2017 AIChE Annual Meeting; Vol. 2017-October). American Institute of Chemical Engineers.