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Title: Overestimation of Viscosity by the Green-Kubo Method in a Dusty Plasma Experiment

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1356452
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 19; Related Information: CHORUS Timestamp: 2017-05-11 08:42:20; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Haralson, Zach, and Goree, J. Overestimation of Viscosity by the Green-Kubo Method in a Dusty Plasma Experiment. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.118.195001.
Haralson, Zach, & Goree, J. Overestimation of Viscosity by the Green-Kubo Method in a Dusty Plasma Experiment. United States. doi:10.1103/PhysRevLett.118.195001.
Haralson, Zach, and Goree, J. Wed . "Overestimation of Viscosity by the Green-Kubo Method in a Dusty Plasma Experiment". United States. doi:10.1103/PhysRevLett.118.195001.
@article{osti_1356452,
title = {Overestimation of Viscosity by the Green-Kubo Method in a Dusty Plasma Experiment},
author = {Haralson, Zach and Goree, J.},
abstractNote = {},
doi = {10.1103/PhysRevLett.118.195001},
journal = {Physical Review Letters},
number = 19,
volume = 118,
place = {United States},
year = {Wed May 10 00:00:00 EDT 2017},
month = {Wed May 10 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevLett.118.195001

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

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  • The long-standing disagreement over the shear viscosity coefficient of the Lennard-Jones fluid near the triple point is reexamined through a series of very extensive Monte Carlo molecular-dynamics calculations of this transport coefficient based on the Green-Kubo theory. The stress autocorrelation function is shown to exhibit a slow decay, principally in the kinetic-potential and the potential-potential terms, which is large compared with the kinetic-kinetic long-time tail predicted by simple mode-coupling theory. Nonetheless, the viscosity coefficient, exclusive of any correction for this tail for times greater than are accessible numerically, is found to agree with that of Schoen and Hoheisel (who discountedmore » the existence of such a tail) as well as nonequilibrium molecular-dynamics calculations. The large value of the viscosity coefficient found by Levesque and co-workers for 864 particles is brought into statistical agreement with the present results by a modest, but not unrealistic, increase in its statistical uncertainty. The pressure is found to exhibit an anomalous dependence on the size of the system, but the viscosity as well as the self-diffusion constant appear to be linear in the inverse of the number of particles, within the precision of our calculations. The viscosity coefficient, including a long-time-tail contribution based on the extended mode-coupling theory is (3.796 +- 0.068)sigmaepsilon-c/m)/sup 1/2/ for the Lennard-Jones potential, fitted to a cubic spline, and (3.345 +- 0.068)sigmaepsilon-c/m)/sup 1/2/ for the potential truncated at 2.5sigma« less
  • Here, given the unique optical properties of LiF, it is often used as an observation window in high-temperature and -pressure experiments; hence, estimates of its transmission properties are necessary to interpret observations. Since direct measurements of the thermal conductivity of LiF at the appropriate conditions are difficult, we resort to molecular simulation methods. Using an empirical potential validated against ab initio phonon density of states, we estimate the thermal conductivity of LiF at high temperatures (1000–4000 K) and pressures (100–400 GPa) with the Green-Kubo method. We also compare these estimates to those derived directly from ab initio data. To ascertainmore » the correct phase of LiF at these extreme conditions, we calculate the (relative) phase stability of the B1 and B2 structures using a quasiharmonic ab initio model of the free energy. We also estimate the thermal conductivity of LiF in an uniaxial loading state that emulates initial stages of compression in high-stress ramp loading experiments and show the degree of anisotropy induced in the conductivity due to deformation.« less
  • Cited by 3