New Correlations for Two Phase Flow Pressure Drop in Homogeneous Flows Model

Abstract

The calculation of pressure drop in pipes two-phase flow is essential in different areas. Even though several studies concerning this issue have been conducted, an accurate correlation is still required. The objective of the paper is to develop correlations for two-phase friction pressure drop and mixture viscosity. The new correlation can be used to compute the friction pressure drop for two phase flow in homogenous approach modeling. The original equation is generated from a similitude between the mixture viscosity for two-phase flows and the thermal conductivity of the porous structure. The new correlation is evaluated against 846 experimental data of friction pressure drop collected from literature on circular pipes; the experimental data including different working fluids such as R1234ze (E), R32, R-600a R717, R134a, R410A and carbon dioxide (CO2) at different hydraulic inner diameters and mass flux. Models are assessed based on the relative percentage error and the probability density function (PDF). The predictions by the new correlation and other correlations from the literature are compared based on some experimental data. It is found that new correlation has a mean absolute relative deviation (MARD) of 30%. It is proved that these new correlations of two-phase flow pressure drop can be used to predict the experiment measurements of pressure drop, on circular pipes, minichannels and microchannels.