On the validity of Fourier's law in systems with spatially varying strain rates

G. Ayton; O. G. Jepps; D. J. Evans

doi:10.1080/00268979909483031

On the validity of Fourier's law in systems with spatially varying strain rates

G. Ayton, O. G. Jepps, D. J. Evans

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Abstract

Non-equilibrium molecular dynamics (NEMD) simulations are used to study the generation of heat fluxes in systems with spatially varying shear rates. We show that the kinetic temperature, when used in Fourier's law of heat conduction, does not correctly account for the heat flux, and that the normal temperature as described by Rugh (1997, Phys. Rev. Lett., 78, 772), should be used. Only in the absence of normal temperature gradients can heat fluxes due to strain rate coupling be correctly calculated.

Original language	English
Pages (from-to)	915-920
Number of pages	6
Journal	Molecular Physics
Volume	96
Issue number	6
DOIs	https://doi.org/10.1080/00268979909483031
Publication status	Published - Mar 1999

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abstract = "Non-equilibrium molecular dynamics (NEMD) simulations are used to study the generation of heat fluxes in systems with spatially varying shear rates. We show that the kinetic temperature, when used in Fourier's law of heat conduction, does not correctly account for the heat flux, and that the normal temperature as described by Rugh (1997, Phys. Rev. Lett., 78, 772), should be used. Only in the absence of normal temperature gradients can heat fluxes due to strain rate coupling be correctly calculated.",

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On the validity of Fourier's law in systems with spatially varying strain rates

Abstract

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