Volume 118, Number 5, June 2017
|Number of page(s)||7|
|Published online||16 August 2017|
Guyer-Krumhansl–type heat conduction at room temperature
1 Department of Energy Engineering, BME - Budapest, Hungary
2 Department of Theoretical Physics, MTA Wigner Research Centre for Physics, Institute for Particle and Nuclear Physics - Budapest, Hungary
3 Montavid Thermodynamic Research Group - Budapest, Hungary
4 Department of Cybernetics, School of Science, Tallinn University of Technology - Tallinn, Estonia
Received: 17 May 2017
Accepted: 20 July 2017
Results of heat pulse experiments in various artificial and natural materials are reported in this paper. The experiments are performed at room temperature with macroscopic samples. It is shown that temperature evolution does not follow Fourier's law but is well explained by the Guyer-Krumhansl equation. The observations confirm the ability of non-equilibrium thermodynamics to formulate universal constitutive relations for thermomechanical processes.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 66.70.-f – Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves / 44.10.+i – Heat conduction
© EPLA, 2017
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