S. Sato et al., FLOODING IN GAS-LIQUID COUNTERCURRENT 2-PHASE FLOW IN PARALLEL VERTICAL PIPES, JSME international journal. Series B, fluids and thermal engineering, 40(3), 1997, pp. 409-414
Flow regime transition and pressure drop in gas-liquid countercurrent
two-phase flow was studied in three vertical parallel channels. The co
nditions for flooding initiation in parallel-channel systems could be
predicted well using Imura's correlation for a single channel. After f
looding, the flow patterns were different in each channel. A how patte
rn classification diagram for the three-channel system was developed b
ased on the flow patterns observed under various conditions of gas and
liquid flow rates. It was seen from the results of pressure measureme
nt in the three-channel system that the maximum pressure developed in
each channel had a serious effect on the average pressure in the lower
plenum, and that the frictional loss coefficient, estimated from the
time-averaged pressure in the lower plenum, could be correlated to the
relative gas Reynolds number.