B 16 Baidakov, V. G. First correction to surface tension for the curvature of an interface / V. G. Baidakov, S. P. Protsenko, G. G. Gorbatovskaya // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2009. - Vol.71, №4. - С. 437-445 Рубрики: ФИЗИКА Кл.слова (ненормированные): LIQUID-VAPOR INTERFACE -- MOLECULAR DYNAMICS -- PRESSURE TENSOR Аннотация: Tolman parameter delta(T), which determines the first correction to surface tension for the interface curvature, is calculated in molecular-dynamic experiments performed for Lennard-Jones fluid within the temperature range from the critical to the triple point (and slightly below). It is shown that parameter delta(T) is positive and slightly depends on temperature; its absolute magnitude is no larger than 0.1-0.2 molecular diameters and does not coincide with the distance between the equimolecular dividing surface and the surface of tension in a flat interfacial layer, as calculated through the first moment of the pressure tensor. The results of the moleculardynamic experiments are compared with the delta(T) values calculated in terms of the extended version of the van der Waals theory of capillarity. It is established that taking into account terms of higher orders than the squared density gradient in the expansion of the free energy of an inhomogeneous system does not reverse the negative sign at delta(T) and slightly affects its value |