Evaluation of Mixture Viscosity Models in the Prediction of Two-phase Flow Pressure Drops

Over the years, studies on two-phase (gasliquid, liquid-liquid) flows have accelerated because understanding the two-phase flow phenomenon becomes more and more important and necessary in scientific and industrial applications. In many works of research, the characteristics of two-phase flow have been investigated by using theoretical and experimental approaches. Numerous theoretical models and empirical correlations have also been developed for predicting twophase pressure drop. However, no general model reliably predicts the two-phase flow pressure drop because of the complexity of phase interaction, motion and deformation of the interface between phases, as well as nonlinearity characteristics. Therefore, by trial and error, many researchers are developing new models and testing these for predicting twophase flow pressure drop in attempts to improve the accuracy of prediction.