An experimental technique for measuring the effective thermal conductivity of saturated porous media is presented. The experimental method is based on the transient heating of a semi-infinite cylinder by a constant heat flux at the boundary. The data reduction technique is unique because it avoids determining the effective thermal diffusivity and quantifying the boundary heat flux. The technique is used to measure the effective thermal conductivity of glass-water, glass-air, and steel-air systems. These systems yield solid-fluid conductivity ratios of 1.08, 25.7, and 2400, respectively. The solid phases consist of glass spheres and steel ball bearings, which give mean porosities of 0.365 and 0.403. In addition, particular attention is paid to assessing experimental uncertainty. Consequently, this study provides data with a degree of precision not typically found the literature.
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e-mail: htaichl@sandia.gov
e-mail: kulacki@me.umn.edu
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November 2006
This article was originally published in
Journal of Heat Transfer
Technical Briefs
A Transient Technique for Measuring the Effective Thermal Conductivity of Saturated Porous Media With a Constant Boundary Heat Flux
H. T. Aichlmayr,
e-mail: htaichl@sandia.gov
H. T. Aichlmayr
Mem. ASME
Sandia National Laboratories
, 7011 East Avenue, Livermore, CA 94550
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F. A. Kulacki
F. A. Kulacki
Fellow ASME
Department of Mechanical Engineering,
e-mail: kulacki@me.umn.edu
The University of Minnesota
, Minneapolis, MN 55455
Search for other works by this author on:
H. T. Aichlmayr
Mem. ASME
Sandia National Laboratories
, 7011 East Avenue, Livermore, CA 94550e-mail: htaichl@sandia.gov
F. A. Kulacki
Fellow ASME
Department of Mechanical Engineering,
The University of Minnesota
, Minneapolis, MN 55455e-mail: kulacki@me.umn.edu
J. Heat Transfer. Nov 2006, 128(11): 1217-1220 (4 pages)
Published Online: February 21, 2006
Article history
Received:
May 11, 2005
Revised:
February 21, 2006
Citation
Aichlmayr, H. T., and Kulacki, F. A. (February 21, 2006). "A Transient Technique for Measuring the Effective Thermal Conductivity of Saturated Porous Media With a Constant Boundary Heat Flux." ASME. J. Heat Transfer. November 2006; 128(11): 1217–1220. https://doi.org/10.1115/1.2352791
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