Traditional liquid entrainment correlations for two-phase flow systems only provide information about the net mass transfer between the phases and not much data are available regarding the drop size distribution of entrained, low surface tension liquids (i.e. hydrocarbons) when the working pressure is higher than the atmospheric pressure. In this paper we study the additional drop size distribution information and we provide with a probability function that can be taken into consideration in suitable mathematical frameworks in order to increase the level of detail in describing multiphase systems. The presented probability function is case dependent and developed for the current data. The actual dataset provides new results for liquid entrainment of a mixture of Exxsol D60 (TM) as the liquid phase and pure nitrogen as the gas phase. The calculated corresponding surface tension was 24.4mN/m. (C) 2009 Elsevier Ltd. All rights reserved.