Pore-scale numerical experiment on the effect of the pertinent parameters on heat flux splitting at the boundary of a porous medium

Imani, Gholamreza, Maerefat, Mehdi and Hooman, Kamel (2013) Pore-scale numerical experiment on the effect of the pertinent parameters on heat flux splitting at the boundary of a porous medium. Transport in Porous Media, 98 3: 631-649. doi:10.1007/s11242-013-0164-8


Author Imani, Gholamreza
Maerefat, Mehdi
Hooman, Kamel
Title Pore-scale numerical experiment on the effect of the pertinent parameters on heat flux splitting at the boundary of a porous medium
Journal name Transport in Porous Media   Check publisher's open access policy
ISSN 0169-3913
1573-1634
Publication date 2013-07
Sub-type Article (original research)
DOI 10.1007/s11242-013-0164-8
Volume 98
Issue 3
Start page 631
End page 649
Total pages 19
Place of publication Dordrecht, Netherlands
Publisher Springer
Collection year 2014
Language eng
Abstract Pore-scale heat and fluid flow simulation through reconstructed porous media is presented with the aim of investigating the physics of heat flux splitting at the boundary of porous media. As such, the effects of the solid to fluid thermal conductivity ratio, porosity, pore-scale Reynolds number, Prandtl number and heat conduction within the solid matrix are investigated. The results of the present study for heat transfer coefficient and pressure drop are compared with available experimental data and good agreement was observed. The validated results are then used to investigate the validity of the existing volume-averaged models. It was observed that while results based on the volume-averaged models are reasonably close to current predictions for ε ≤ 0.7, the discrepancy between the two becomes notable for higher porosities. While existing models rely exclusively on porosity and thermal conductivity ratio, our newly proposed correlations show the effects of Reynolds number on the heat split mechanism for high porosities. On the other hand, the Prandtl number, at least for the range of parameters studies here, is found to be less influential on the boundary heat split mechanism.
Keyword Pore-scale simulation
Heat flux splitting
Porous media
Constant heat flux
Lattice Boltzmann method
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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