Theoretical background for simulation of physical processes in the interfacial layer “solid-liquid”

The paper considers the model of “solid-liquid” interfacial layer represented as a tensor of interfacial stresses by a tensor of molecular pressure. It assumes that the constant density of the medium within the interfacial layer taking into account the low compressibility of fluids. This made it possible to determine the distribution of pressure along the layer thickness. The research shows that if the wetting is adequate, the pressure on the solid wall is considerably higher than the pressure in the liquid volume phase. It has been established that to provide meniscus equilibrium conditions, it is necessary to change the thickness of the interfacial layer along the meniscus height. The research shows that the “solid-liquid” interfacial layer is considerably less thick than the “liquid-gas” layer. As a result, we have obtained theoretical equations to determine state parameters of the interfacial layer in question.