title: Scaling behavior for the pressure and energy of shearing fluids.
abstract: Recent simulation work has established that the widely accepted mode-coupling theory for the strain rate dependence of the pressure and energy of simple fluids under shear (i.e., energy and pressure are functions of strain rate to the power 3 / 2) is observed in the vicinity of the triple point. Away from the triple point, the scaling exponent of the strain rate was seen to be closer to 2 than 3 / 2, suggesting a possible analytic behavior. In this paper, we accurately determine the scaling exponent behavior for a Lennard-Jones fluid in the dense fliud region and find that it varies continuously between approximately 1.2 and approximately 2 as a function of density and temperature, thus confirming its nonanalyticity. We furthermore find that the behavior is characterized by a simple linear function of density and temperature.
authors.affiliation: Centre for Molecular Simulation, Swinburne University of Technology, Hawthorn, Victoria, Australia.
authors.forename: Jialin
authors.initials: J
authors.lastname: Ge
authors.forename: B D
authors.initials: BD
authors.lastname: Todd
authors.forename: Guangwen
authors.initials: G
authors.lastname: Wu
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Sadus