Freezing density scaling of fluid transport properties: Application to liquefied noble gases

TL;DR

This paper demonstrates that freezing density scaling effectively predicts transport properties like viscosity and thermal conductivity in liquefied noble gases, supported by theoretical frameworks and empirical data.

Contribution

It introduces a freezing density scaling approach based on Rosenfeld's excess entropy and isomorph theory, applied to noble gases, showing good agreement with experimental data.

Findings

Freezing density scaling applies well to noble gases' transport properties.

Reduced transport coefficients are quasi-universal at freezing conditions.

Thermal conductivity at freezing matches vibrational model predictions.

Abstract

A freezing density scaling of transport properties of the Lennard-Jones fluid is rationalized in terms of the Rosenfeld's excess entropy scaling and isomorph theory of Roskilde-simple systems. Then, it is demonstrated that the freezing density scaling operates reasonably well for viscosity and thermal conductivity coefficients of liquid argon, krypton, and xenon. Quasi-universality of the reduced transport coefficients at their minima and at freezing conditions is discussed. The magnitude of the thermal conductivity coefficient at the freezing point is shown to agree remarkably well with the prediction of the vibrational model of heat transfer in dense fluids.