Freezing density scaling of transport coefficients in the Weeks-Chandler-Andersen fluid

S. A. Khrapak; A. G. Khrapak

doi:10.1063/5.0199310

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arXiv · 2404.16603

Freezing density scaling of transport coefficients in the Weeks-Chandler-Andersen fluid

S. A. Khrapak·A. G. Khrapak

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Abstract

It is shown that the transport coefficients (self-diffusion, shear viscosity, and thermal conductivity) of the Weeks-Chandler-Anderson (WCA) fluid along isotherms exhibit a freezing density scaling (FDS). The functional form of this FDS is essentially the same or closely related to those in the Lennard-Jones fluid, hard-sphere fluid, and some liquefied noble gases. This proves that this FDS represents a quasi-universal corresponding state principle for simple classical fluids with steep interactions. Some related aspects such as Stokes-Einstein relation without a hydrodynamic diameter and gas-to-liquid dynamical crossover are briefly discussed. Simple fitting formula for the transport coefficients of the dense WCA fluid are suggested.

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S. A. Khrapak, A. G. Khrapak. 2024-04-25. Freezing density scaling of transport coefficients in the Weeks-Chandler-Andersen fluid. https://doi.org/10.1063/5.0199310

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