A contribution to the theory of the transient hot-wire technique for thermal conductivity measurements

J. Kestin and W.A. Wakeham

Physica A: Statistical Mechanics and its Applications, 1978, vol. 92, issue 1, 102-116

Abstract: The paper presents rigorous working equations for an automatic Wheatstone bridge employed in fluid thermal conductivity measurements by the transient hot-wire technique. Particular attention is concentrated upon the inevitable small differences between the two wires employed for the cancellation of the end effects in the experimental arrangement. It is shown that from experimental measurements of the change in the difference of resistance of the two wires as a function of time during their transient heating, it is possible to determine the temperature rise of a wire acting as a finite section of an infinite wire. The correct expressions for the calculation of the heat flux in the wire are also given.

Date: 1978
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:92:y:1978:i:1:p:102-116

DOI: 10.1016/0378-4371(78)90023-7

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