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Is thermal conductivity time-dependent?

Hüttner, Bernd (2008) Is thermal conductivity time-dependent? physica status solidi b, 245 (12), pp. 2786-2790. Wiley-VCH. DOI: 10.1002/pssb.200844182.

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Abstract

The question whether thermal conductivity may be time dependent on short time scales is investigated and answered in the affirmative. For this purpose, we make use of a classical relation between the Brownian mean displacement and the thermal conductivity. Interest-ingly, the transition from the time dependent regime to stationary behaviour is in the vicinity of Allen’s temperature relaxation time. Calculation of the electronic temperature, when the new time dependent thermal conductivity is used, shows an improvement in the re-sults derived by means of the two-temperature model. Furthermore, the Wiedemann-Franz law is not valid in the time regime investigated.

Document Type:Article
Title:Is thermal conductivity time-dependent?
Authors:
AuthorsInstitution or Email of Authors
Hüttner, BerndUNSPECIFIED
Date:November 2008
Journal or Publication Title:physica status solidi b
Volume:245
DOI:10.1002/pssb.200844182
Page Range:pp. 2786-2790
Publisher:Wiley-VCH
Status:Published
Keywords:thermal conductivity, short time physics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Lampoldshausen , Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dr.rer.nat. Bernd Hüttner
Deposited On:08 Dec 2008
Last Modified:12 Dec 2013 20:34

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