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  On the inertia of heat

Smerlak, M. (2012). On the inertia of heat. The European Physical Journal Plus, 127(7): 72. doi:10.1140/epjp/i2012-12072-4.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-8422-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-8424-5
Genre: Journal Article

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1202.3324 (Preprint), 104KB
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 Creators:
Smerlak, Matteo1, Author              
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1Microscopic Quantum Structure & Dynamics of Spacetime, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_67201              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Condensed Matter, Statistical Mechanics, cond-mat.stat-mech
 Abstract: Does heat have inertia? This question is at the core of a long-standing controversy on Eckart's dissipative relativistic hydrodynamics. Here I show that the troublesome inertial term in Eckart's heat flux arises only if one insists on defining thermal diffusivity as a spacetime constant. I argue that this is the most natural definition, and that all confusion disappears if one considers instead the space-dependent comoving diffusivity, in line with the fact that, in the presence of gravity, space is an inhomogeneous medium.

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 Dates: 2012-02-152012
 Publication Status: Published in print
 Pages: 3 pages
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1202.3324
DOI: 10.1140/epjp/i2012-12072-4
 Degree: -

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Title: The European Physical Journal Plus
Source Genre: Journal
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Pages: - Volume / Issue: 127 (7) Sequence Number: 72 Start / End Page: - Identifier: ISSN: 2190-5444