Density scaling of generalized Lennard-Jones fluids in different dimensions

Thibaud Maimbourg*, Jeppe Dyre, Lorenzo Costigliola

*Corresponding author

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Liquids displaying strong virial-potential energy correlations conform to an approximate
density scaling of their structural and dynamical observables. This scaling property does
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, a 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.
TidsskriftSciPost Physics
Udgave nummer6
Antal sider25
StatusUdgivet - 22 dec. 2020

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