The effective heat and mass transport properties of a porous packed bed of particles undergoing a high-temperature solid–gas thermochemical transformation are determined. The exact 3D geometry of the reacting porous media is obtained by high-resolution computed tomography. Finite volume techniques are applied to solve the governing conservation equations at the pore-level scale and to determine the effective transport properties as a function of the reaction extent, namely, the convective heat transfer coefficient, permeability, Dupuit–Forchheimer coefficient, tortuosity, and residence time distributions. These exhibit strong dependence on the bed morphological properties (e.g., porosity, specific surface area, particle size) and, consequently, vary with time as the reaction progresses.
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Research Papers
Tomography-Based Determination of Effective Transport Properties for Reacting Porous Media
Sophia Haussener,
Sophia Haussener
Department of Mechanical Engineering, EPFL, 1015 Lausanne,
e-mail: Sophia.haussener@epfl.ch
Switzerland
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Iwan Jerjen,
Iwan Jerjen
Department of Electronics/Metrology,
EMPA Material Science and Technology
, Überlandstrasse 129, 8600 Dübendorf, Switzerland
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Peter Wyss,
Peter Wyss
Department of Electronics/Metrology,
EMPA Material Science and Technology
, Überlandstrasse 129, 8600 Dübendorf, Switzerland
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Aldo Steinfeld
Aldo Steinfeld
Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland; Solar Technology Laboratory,
Paul Scherrer Institute
, 5232 Villigen, Switzerland
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Sophia Haussener
Department of Mechanical Engineering, EPFL, 1015 Lausanne,
Switzerland
e-mail: Sophia.haussener@epfl.ch
Iwan Jerjen
Department of Electronics/Metrology,
EMPA Material Science and Technology
, Überlandstrasse 129, 8600 Dübendorf, Switzerland
Peter Wyss
Department of Electronics/Metrology,
EMPA Material Science and Technology
, Überlandstrasse 129, 8600 Dübendorf, Switzerland
Aldo Steinfeld
Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland; Solar Technology Laboratory,
Paul Scherrer Institute
, 5232 Villigen, Switzerland
J. Heat Transfer. Jan 2012, 134(1): 012601 (8 pages)
Published Online: October 27, 2011
Article history
Received:
April 16, 2011
Accepted:
July 30, 2011
Online:
October 27, 2011
Published:
October 27, 2011
Citation
Haussener, S., Jerjen, I., Wyss, P., and Steinfeld, A. (October 27, 2011). "Tomography-Based Determination of Effective Transport Properties for Reacting Porous Media." ASME. J. Heat Transfer. January 2012; 134(1): 012601. https://doi.org/10.1115/1.4004842
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