The two-phase pressure drop is sensitive to the flow regimes.
Hence, the understanding and delineation of flow regime transitions
is important. The dimensionless parameters K, F, and T
for the present two-phase data are shown as a function of X in
Figures 5-7. Flow visualization could not be made in the opaque
test section used here. According to the two-phase generalized
flow regime map for air-Newtonian liquids (Taitel and Dukler
1976), most of the present experimental two-phase data are in
the plugflow region.