Density scaling of generalized Lennard-Jones fluids in different dimensions

Maimbourg, Thibaud; Dyre, Jeppe; Costigliola, Lorenzo

doi:10.21468/SciPostPhys.9.6.090

SciPost Physics

Density scaling of generalized Lennard-Jones fluids in different dimensions

Thibaud Maimbourg, Jeppe C. Dyre, Lorenzo Costigliola

SciPost Phys. 9, 090 (2020) · published 22 December 2020

doi: 10.21468/SciPostPhys.9.6.090
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Abstract

Liquids displaying strong virial-potential energy correlations conform to an approximate density scaling of their structural and dynamical observables. These scaling properties do not extend to the entire phase diagram, in general. The validity of the scaling can be quantified by a correlation coefficient. In this work a simple scheme to predict the correlation coefficient and the density-scaling exponent is presented. Although this scheme is exact only in the dilute gas regime or in high dimension d, the comparison with results from molecular dynamics simulations in d = 1 to 4 shows that it reproduces well the behavior of generalized Lennard-Jones systems in a large portion of the fluid phase.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.9.6.090
TI  - Density scaling of generalized Lennard-Jones fluids in different dimensions
PY  - 2020/12/22
UR  - https://www.scipost.org/SciPostPhys.9.6.090
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 9
IS  - 6
SP  - 090
A1  - Maimbourg, Thibaud
AU  - Dyre, Jeppe
AU  - Costigliola, Lorenzo
AB  - Liquids displaying strong virial-potential energy correlations conform to an approximate density scaling of their structural and dynamical observables. These scaling properties do not extend to the entire phase diagram, in general. The validity of the scaling can be quantified by a correlation coefficient. In this work a simple scheme to predict the correlation coefficient and the density-scaling exponent is presented. Although this scheme is exact only in the dilute gas regime or in high dimension d, the comparison with results from molecular dynamics simulations in d = 1 to 4 shows that it reproduces well the behavior of generalized Lennard-Jones systems in a large portion of the fluid phase.
ER  -

@Article{10.21468/SciPostPhys.9.6.090,
	title={{Density scaling of generalized Lennard-Jones fluids in different dimensions}},
	author={Thibaud Maimbourg and Jeppe C. Dyre and Lorenzo Costigliola},
	journal={SciPost Phys.},
	volume={9},
	pages={090},
	year={2020},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.9.6.090},
	url={https://scipost.org/10.21468/SciPostPhys.9.6.090},
}

Cited by 5

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¹ ² Thibaud Maimbourg,
³ Jeppe Dyre,
³ Lorenzo Costigliola

Funder for the research work leading to this publication

Villum Fonden / Velux Foundation