Gavryushenko D. Influence of confined geometry and irradiation on properties of liquids and liquid systems

The influence of a spatial confinement and irradiation on a thermodynamic behaviour of equilibrium and non-equilibrium properties of fluid systems has been investigated in the thesis. The correlation effects generalization of a confined non-uniform fluid theory has been built in the case of a binary solution. The obtained results let us to calculate a concentration spatial distribution of a binary fluid system within wide range of thermodynamic parameters variations. The general approach for a calculation of a adsorbed adsorbent molecules inter-molecular potential as well as a critical temperature of a two-dimension phase transition at a spacer-modified adsorbent surface by the determination of the adsorption coefficient concentration dependence discontinuity has been worked out on the basis of the fundamental principles of statistical physics and equilibrium thermodynamic. The proposed approach enables to determine parameters of intermolecular interaction in the case of one-layer adsorption on a cylindrical surface. The influence of irradiation on structural and thermodynamic properties of fluids and fluid systems has been investigated. A shift of first-order phase transition parameters has been determined for a fluid system under irradiation as well as a variation of solubility in the system has been described. The diffusion equations with concentration-dependant diffusion coefficients has been proposed on the base of the fundamental principles of linear non-equilibrium thermodynamics. The entropy production has been found for different-kinds solutions under facilitated stationary diffusion. The thermodynamic theory of facilitated stationary diffusion within confined geometry fluid systems has been built with the inclusion of reversible chemical reactions by consideration of corresponding solution activity coefficients. The dependence of entropy production upon concentration gradients has been found for solutions of several kinds in such processes. The approach for calculation the dependence of entropy production upon concentration gradients of evaporating substance ahs been developed for diffusion droplet evaporation. The entropy production has been determined for ideal background gas. The temperature dependence of Tolmen’s delta-correction has been shown to be described by the scaling law along coexisting curve in the vicinity of the critical point liquid-vapour. The corresponding critical index has been calculated.