ABSTRACT
Abstract-Determination of vapor-liquid interfacial tension for crude oils is crucial in improved oil recovery processes such as gas and chemical injection, and in multiphase flow dynamics in porous media. In this paper, we have proposed a new mechanistic parachor model to predict dynamic vapor-liquid interfacial tension of crude oils by incorporating mass transfer effects into the traditional parachor model, using the ratio of vapor-liquid diffusivities raised to an exponent. The sign and magnitude of the exponent in the proposed model have been used to characterize the type and extent of the governing mass transfer mechanism (vaporization or condensation) responsible for attaining vapor-liquid phase equilibria.
