Sub-grid filtering model for multiphase heat transfer with immersed tubes

William A. Lane, Emily M. Ryan, Avik Sarkar, Sankaran Sundaresan

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

Adequately resolving the hydrodynamics and heat transfer in gas-solid flow simulations typically requires computational grids on the order of 1-10 particle diameters. This requirement is not feasible for most full-scale applications. To overcome these impracticalities, we consider a sub-grid filtering approach where the microscopic heat transfer mechanisms are approximated through coarse grid simulations using constitutive relations. Using the open source CFD code Multiphase Flow with Interphase Exchanges (MFIX), we simulate a periodic unit cell domain with immersed horizontal heat transfer cylinders under varying solid-phase fractions and temperatures. The simulation results are averaged over the domain and are used to fit functional forms describing relations between the flow properties and input conditions. The result is a constitutive function that is added as a source term to the solid-phase energy conservation equation to approximate the effective heat transfer between the cylinders and flow with coarse grid simulations.

Original languageEnglish (US)
DOIs
StatePublished - Jan 1 2014
EventASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014 - Montreal, Canada
Duration: Nov 14 2014Nov 20 2014

Other

OtherASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014
CountryCanada
CityMontreal
Period11/14/1411/20/14

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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    Lane, W. A., Ryan, E. M., Sarkar, A., & Sundaresan, S. (2014). Sub-grid filtering model for multiphase heat transfer with immersed tubes. Paper presented at ASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014, Montreal, Canada. https://doi.org/10.1115/IMECE2014-39964