Comment on "reversing the perturbation in nonequilibrium molecular dynamics: an easy way to calculate the shear viscosity of fluids"

Müller-Plathe [Phys. Rev. E 59, 4894 (1999)] gives a velocity exchange method that creates a shear momentum flux. Measurement of the mean velocity gradient allows the determination of the shear viscosity. Low gradients are achieved when the time interval between exchanges is large (low frequency). W...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2002-07, Vol.66 (1 Pt 1), p.013201-013201
Main Authors: Calderon, Christopher P, Ashurst, Wm T
Format: Article
Language:English
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Summary:Müller-Plathe [Phys. Rev. E 59, 4894 (1999)] gives a velocity exchange method that creates a shear momentum flux. Measurement of the mean velocity gradient allows the determination of the shear viscosity. Low gradients are achieved when the time interval between exchanges is large (low frequency). We show that low frequency does not produce a steady shear flow while a weaker, but continuous exchange, does have a steady flow.
ISSN:1539-3755
DOI:10.1103/PhysRevE.66.013201