Estimation of the stagnant thermal conductivity of saturated porous media

1991 ◽  
Vol 34 (6) ◽  
pp. 1575-1576 ◽  
Author(s):  
D.A. Nield
Keyword(s):  
Thermal Conductivity ◽  
Porous Media ◽  
Saturated Porous Media

A Transient Technique for Measuring the Effective Thermal Conductivity of Saturated Porous Media With a Constant Boundary Heat Flux

2006 ◽  
Vol 128 (11) ◽  
pp. 1217-1220 ◽  
Author(s):  
H. T. Aichlmayr ◽  
F. A. Kulacki
Keyword(s):  
Thermal Conductivity ◽  
Heat Flux ◽  
Porous Media ◽  
Effective Thermal Conductivity ◽  
Constant Heat Flux ◽  
Infinite Cylinder ◽  
Saturated Porous Media ◽  
Transient Heating ◽  
Effective Thermal Diffusivity ◽  
Data Reduction Technique

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 3.96mm glass spheres and 14mm 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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