Radiation influence on the temperature-dependent parameters of fluids

TL;DR

This paper introduces a theoretical model based on the Bogolyubov chain of equations to describe how irradiation affects the thermophysical properties of liquids, emphasizing the role of an effective temperature and structural changes.

Contribution

It presents a novel theoretical framework linking irradiation-induced structural changes to thermophysical properties via the effective temperature concept.

Findings

The model predicts thermophysical property changes under irradiation.

Structural changes are linked to modifications in Maxwell distribution coefficients.

Qualitative agreement with experimental data on surface tension under irradiation.

Abstract

Based on the fundamental Bogolyubov chain of equations, a model relating the structural and thermophysical properties of the nonequilibrium liquid systems under irradiation in stationary state is introduced. The obtained results suggest that the thermophysical properties of the liquid systems under irradiation are defined by the {\textquotedblleft}effective temperature{\textquotedblright} that can be calculated from the perturbed momentum distribution functions of the systems. It is shown that the structural changes in the liquid systems under irradiation are caused by the changes in the coefficients of the Maxwell distribution function due to the momentum exchange between the active particles and the particles forming the liquid. To confirm the theoretical predictions, a qualitative comparison of the model with the existing experimental data on irradiation influence on the surface tension coefficients of liquids is performed.