Continuous measurement of surface and interfacial tension by stationary slug method

Abstract The surface tensions of various liquids have been measured continuously by controlling their flow so that a slug of air is held stationary in a vertical tube. The dependence between the velocity (expressed as Froude number) and surface tension (expressed as Eotvos number) has been correlated for many low viscosity liquids. An extension of the correlation to viscous liquids has also been proposed and the effect of temperature has been …