Determining Liquid Nanolayer Thickness at the Solid–Liquid Interface

Liquid layers on solid surfaces play an important role in natural processes, influencing the physical properties of systems in which contact between the liquid and solid occurs. The interaction between the liquid and solid at the interface determines the structure and thickness of the structured liquid layer on the solid surface. Despite existing research on this problem, the contact between the liquid and solid has not been sufficiently studied. This paper proposes a model for determining the thickness of a structured liquid nanolayer by calculating the van der Waals attraction energy between the liquid and a solid plate. The case of high nanoparticle concentration in nanofluids is considered separately, where in addition to the van der Waals attraction energy between the fluid and nanoparticles, the attraction and repulsion energies of nanoparticles are also taken into account. The results of the proposed model are in good agreement with available experimental data.