Abstract
The above referenced paper, published in International Journal of Multiphase Flow ( Pan and Hanratty, 2002), proposed an entrainment fraction correlation for annular flow in horizontal pipes. The entrainment fraction in annular flow is defined as the ratio of the mass flow rate of the liquid droplets in the gas to the total mass flow of liquid, F E = W LE/W L . The proposed correlation was verified with experimental data for liquids with viscosities close to that of water. The proposed entrainment fraction correlation includes another correlation for the critical film flow rate, W F,cr to estimate a maximum entrainment fraction F E,max . It is shown that the critical film flow rate correlation can result in negative maximum entrainment fraction values, for low liquid flow rates.
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