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TECHNICAL PAPERS

Numerical Analysis of Thermal-Solutal Convection in Heterogeneous Porous Media

[+] Author and Article Information
Charles-Guobing Jiang

Department of Mechanical Engineering,  Ryerson University, Gerrard Street, Toronto M5B 2E8, Canadacharlesguobing.jiang@utoronto.ca

M. Ziad Saghir

Department of Mechanical Engineering,  Ryerson University, Gerrard Street, Toronto M5B 2E8, Canadazsaghir@Ryerson.ca

M. Kawaji

Department of Chemical Engineering and Applied Chemistry,  University of Toronto, College Street, Toronto M5S 3E5, Canadakawaji@ecf.utoronto.ca

J. Appl. Mech 73(1), 21-25 (Apr 25, 2005) (5 pages) doi:10.1115/1.1992515 History: Received June 15, 2004; Revised April 25, 2005

Thermal diffusion, or Soret effect, in porous media is mathematically modeled with the Firoozabadi model based on non-equilibrium thermodynamics. The Soret effect in a binary mixture is investigated in a vertical cavity with heterogeneous permeability, where natural convection can occur. The thermo solutal convection with heterogeneous permeability was studied in terms of flow pattern, concentration distribution, component separation ratio, and Soret coefficient distribution. A consistent analysis was conducted and it is concluded that the Soret coefficient of thermal diffusion in porous media strongly depends on the heterogeneity of permeability.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 2

Convection streamlines in the heterogeneous porous cavity

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Figure 3

Mole fraction of component 1 distribution in the heterogeneous porous cavity

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Figure 4

Component separation ratio in the heterogeneous porous cavity

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Figure 5

Vertical soret coefficient distribution in the center of the cavity

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Figure 1

Two-dimensional porous media domain and boundary conditions

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