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A Bound from Below on the Temperature for the Navier--Stokes--Fourier System

Author(s)
Baer, Eric; Vasseur, Alexis
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We give a uniform bound from below on the temperature for a variant of the compressible Navier-Stokes--Fourier system, under suitable hypotheses. This system of equations forms a mathematical model of the motion of a compressible fluid subject to heat conduction. Building upon the work of [A. Mellet and A. Vasseur, Monatsh. Math., 157 (2009), pp. 143--161], we identify a class of weak solutions satisfying a localized form of the entropy inequality (adapted to measure the set where the temperature becomes small) and use a form of the De Giorgi argument for L∞ bounds of solutions to elliptic equations with bounded measurable coefficients.
Date issued
2013-07
URI
http://hdl.handle.net/1721.1/83887
Department
Massachusetts Institute of Technology. Department of Mathematics
Journal
SIAM Journal on Mathematical Analysis
Publisher
Society for Industrial and Applied Mathematics
Citation
Baer, Eric, and Alexis Vasseur. “A Bound from Below on the Temperature for the Navier--Stokes--Fourier System.” SIAM Journal on Mathematical Analysis 45, no. 4 (January 2013): 2046-2063. © 2013, Society for Industrial and Applied Mathematics
Version: Final published version
ISSN
0036-1410
1095-7154

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