Effect of flow obstruction on two-phase pressure drops in both horizontal and vertical annular flows.

Two phase pressure drops due to friction and obstruction were studied for various blockages in both horizontal and vertical annular flows. These pressure drops are evaluated from the pressure distribution obtained along the test section with the aid of eight Meriam 33KB35 well type manometers. The frictional pressure drop in the channel upstream of the blockage was found to depend upon either the presence or the size of blockage, but it is not …