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Technical Briefs

Comparative Radial Heat Flow Method for Thermal Conductivity Measurement of Liquids

[+] Author and Article Information
Ananth S. Iyengar

Department of Mechanical and Aerospace Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-7222ananth.iyengar@case.edu

Alexis R. Abramson1

Department of Mechanical and Aerospace Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-7222alexis.abramson@case.edu

1

Corresponding author.

J. Heat Transfer 131(6), 064502 (Apr 09, 2009) (3 pages) doi:10.1115/1.3084124 History: Received February 12, 2008; Revised January 08, 2009; Published April 09, 2009

A steady state thermal conductivity measuring setup based on the comparative radial heat flow method is presented. The setup consists of a pair of coaxial cylinders as its main components, with test fluid placed in the annular space between these cylinders with water tight cover plates at the top and bottom of the cylinders. Experiment involves heating the coil at the concentric-center of the inner cylinder; steady state data are acquired for the calculation of the thermal conductivity. Thermal conductivity is calculated by comparing the radial heat flow between the cylinders and the test fluid (comparative method). Thermal conductivity of water, glycerol, and ethylene glycol was measured for varying temperatures and is in good agreement with the published thermal conductivity values in literature.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figure 1

Experimental setup: (a) a schematic cut section illustrating various parts and (b) a schematic of a top-down midsection view of the cylindrical setup; the r labels indicate the radial location of the four thermocouples used

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Figure 2

Comparison of the measured thermal conductivity of water, glycerol, and ethylene glycol with literature values (8)

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