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Measurements of the thermal conductivity of molten lead using a new transient hot wire sensor

Bilek, Jaromir, Atkinson, John and Wakeham, William (2007) Measurements of the thermal conductivity of molten lead using a new transient hot wire sensor International Journal of Thermophysics. Proceedings of the Fifteenth Symposium on Thermophysical Properties, Part II, 28, (2), pp. 496-505. (doi:10.1007/s10765-007-0182-2).

Record type: Article


The paper reports new measurements of the thermal conductivity of molten lead at temperatures from 600 to 750 K. The measurements have been carried out with an updated version of a modified transient hot-wire (THW) method, where the hot-wire sensor is embedded within an insulating substrate with a planar geometry. However, unlike previous sensors of the same type, the updated sensor works with the hot-wire divided into three thermally isolated parts. The operation of this sensor has been modeled theoretically using a finite-element (FE) analysis and has subsequently been confirmed by direct observation. The new sensor is demonstrated to have a higher sensitivity and a better signal-to-noise ratio than earlier sensors. Molten lead is used as the test fluid. It has the lowest thermal conductivity of any material we have yet studied. This allows us to probe the limits of our sensor system for the thermal conductivity of high-temperature melts. It is estimated that the uncertainty of the measurements is 3% over the temperature range studied. The results are used to examine the application of the Wiedemann–Franz (W-F) relationship.

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Published date: May 2007
Additional Information: Presented at the Sixteenth Symposium of Thermophysical Properties, Boulder, USA, 30 Jul - 04 Aug 2006
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Keywords: molten lead, sensor design, thermal conductivity, transient hot-wire


Local EPrints ID: 47754
ISSN: 0195-928X
PURE UUID: 87123d13-7338-461e-b079-ef9fc97a9048
ORCID for John Atkinson: ORCID iD

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Date deposited: 14 Aug 2007
Last modified: 17 Jul 2017 15:03

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Author: Jaromir Bilek
Author: John Atkinson ORCID iD
Author: William Wakeham

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