OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Influence of solid phase thermal conductivity on species separation rate in packed thermogravitational columns: A direct numerical simulation model

Davarzani, Hossein and Marcoux, Manuel Influence of solid phase thermal conductivity on species separation rate in packed thermogravitational columns: A direct numerical simulation model. (2011) Comptes Rendus Mécanique, vol. 339 (n° 5). pp. 355-361. ISSN 1631-0721

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1MB

Official URL: http://dx.doi.org/10.1016/j.crme.2011.03.014

Abstract

n this work, a direct numerical simulation model has been proposed to study the influence of porous matrix thermal properties on the separation rate in a model of packed thermogravitational column saturated by a binary mixture. The coupled flow, heat and mass dimensionless equations and boundary conditions have been derived in pore-scale and then solved over a vertical column containing fluid and solid phases. The results show that the separation rate is changed significantly by the conductivity ratio of the solid/fluid phases. The classical maximum separation at optimal Rayleigh number increases by decreasing the solid thermal conductivity. We obtained that the influence of the solid thermal conductivity for small Rayleigh number is not considerable but for intermediate Rayleigh number the separation rate initially decreases with increasing the thermal conductivity ratio and then reaches an asymptote. As the Rayleigh number increases, convection dominates and the effect of thermal conductivity ratio on separation rate becomes completely inversed.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Comptes Rendus Mécanique website : http://www.sciencedirect.com/science/journal/16310721
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Laboratory name:
Statistics:download
Deposited By: Catherine THURIOT
Deposited On:05 Jul 2011 09:58

Repository Staff Only: item control page