Simultaneous estimation of temperature-dependent volumetric heat capacity and thermal conductivity functions via neural networks

Simultaneous estimation of temperature-dependent volumetric heat capacity and thermal... 1 Introduction</h5> To solve transient heat conduction problems two material properties, volumetric heat capacity and thermal conductivity, have to be known. These properties have a significant temperature dependency in case of several materials. Determination of these properties by the well-known measurement methods needs one or in some cases two measurement devices. Measurement of the temperature dependency (especially in case of the thermal conductivity) usually requires repeated measurements at several temperature levels which might be time-consuming (e.g., hot wire method [2] , laser flash method [3] , hot ball method [4] , hot disc method [5] ). Simultaneous measurement of the two material properties with direct determination of the temperature dependency of the properties could make the measurements easier, faster and cheaper. The BICOND 1 BI refers to the fact that the method is designed to measure both the volumetric heat capacity and the thermal conductivity. COND simply refers to heat conduction. 1 thermophysical property measurement method proposed by Kiss [6] (the BICOND method is summarized in [7] ) was designed for the former task. Although the measurement is easier, the evaluation of the material properties from the measured temperature histories needs the solution of a challenging inverse heat http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Heat and Mass Transfer Elsevier

Simultaneous estimation of temperature-dependent volumetric heat capacity and thermal conductivity functions via neural networks

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Publisher
Elsevier
Copyright
Copyright © 2013 Elsevier Ltd
ISSN
0017-9310
eISSN
1879-2189
D.O.I.
10.1016/j.ijheatmasstransfer.2013.09.010
Publisher site
See Article on Publisher Site

Abstract

1 Introduction</h5> To solve transient heat conduction problems two material properties, volumetric heat capacity and thermal conductivity, have to be known. These properties have a significant temperature dependency in case of several materials. Determination of these properties by the well-known measurement methods needs one or in some cases two measurement devices. Measurement of the temperature dependency (especially in case of the thermal conductivity) usually requires repeated measurements at several temperature levels which might be time-consuming (e.g., hot wire method [2] , laser flash method [3] , hot ball method [4] , hot disc method [5] ). Simultaneous measurement of the two material properties with direct determination of the temperature dependency of the properties could make the measurements easier, faster and cheaper. The BICOND 1 BI refers to the fact that the method is designed to measure both the volumetric heat capacity and the thermal conductivity. COND simply refers to heat conduction. 1 thermophysical property measurement method proposed by Kiss [6] (the BICOND method is summarized in [7] ) was designed for the former task. Although the measurement is easier, the evaluation of the material properties from the measured temperature histories needs the solution of a challenging inverse heat

Journal

International Journal of Heat and Mass TransferElsevier

Published: Jan 1, 2014

References

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