Parameterization of the nonlocal viscosity kernel for an atomic fluid.

Parameterization of the nonlocal viscosity kernel for an atomic fluid. Research Abstract Details 

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Parameterization of the nonlocal viscosity kernel for an atomic fluid. Abstract Text:

J S Hansen,Peter J Daivis,Karl P Travis,B D Todd,J S Hansen,Peter J Daivis,Karl P Travis,B D Todd,J S Hansen,Peter J Daivis,Karl P Travis,B D Todd,

In this paper we present results for the wave-vector dependent shear viscosity for a model atomic fluid with short ranged repulsive interactions computed by molecular dynamics simulations. It is shown that the data can be fitted to two different simple functional forms over a large density range, namely, a function composed of two Gaussian terms and a Lorentzian type function with a variable wave-vector exponent. The parameters of both functional forms are found to obey simple density dependencies. While the first functional form has the advantage that the inverse Fourier transform can be found analytically, the Lorentzian type function fits the wave-vector dependence better over the range of wave vectors and densities studied here. The results show that the real space viscosity kernel has a width of 2 to 3 atomic diameters. This means that the generalized hydrodynamic constitutive relation is required if the strain rate varies significantly over this distance, a situation commonly encountered for nanofluidic flows.

Parameterization of the nonlocal viscosity kernel for an atomic fluid. Publishing Authors By Initials

JS Hansen,PJ Daivis,KP Travis,BD Todd,JS Hansen,PJ Daivis,KP Travis,BD Todd,JS Hansen,PJ Daivis,KP Travis,BD Todd,

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Parameterization of the nonlocal viscosity kernel for an atomic fluid. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Physical review. E, Statistical, nonlinear, and so

VOLUME: 76

Page Numbers: 041121

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ISSN: 1539-3755

DAY: 15

MONTH: 10

YEAR: 2007

Parameterization of the nonlocal viscosity kernel for an atomic fluid. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Parameterization of the nonlocal viscosity kernel for an atomic fluid.

AFFILIATION: Centre for Molecular Simulation, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia.

Country: United States

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MEDLINETA: Phys Rev E Stat Nonlin Soft Ma

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