Flow Behavior and Pressure Drop of Two-Phase Flow through C-Shaped Bend in Vertical Plane, (II)

Abstract

Following Part (I) of the present paper, which presented the experimental results obtained on the flow behavior, average void fraction and pressure drop shown by air-water two-phase upward flow through C-shaped bend in vertical plane, this Part (II) covers the case of downward flow through bent channels of similar configurations. Hydrodynamic behavior differed appreciably from that of upward flow in certain aspects such as the average void fraction. Flow maps are presented indicating the relation between the pattern of flow and flow velocities. Average void fraction and pressure drop were measured and were empirically correlated with each other through the modified Froude number and other non-dimensional values proposed in Part (I).