Flow patterns and volume fractions of phases during liquid–liquid two-phase flow in pipe bends

Abstract This paper presents the results of research into hydrodynamics of horizontal two-phase liquid–liquid flow in pipe bends. The conducted research involved the observation of flow pattern formation and determination of volume fraction of the specific phases which were identified in the flow. On the basis of the results of experimental flow map was created for such flow and a method of calculating volume fractions of the phases was established. The testing was conducted in 180° pipe bends with the internal diameters of 0.016, 0.022, 0.030 m and the respective radius of curvature equal to 0.110, 0.154 and 0.210 m. The media applied in the measurements were machine oils Iterm 12 and LAN 15 as well as water.