抄録
Nature of friction factor in vertical two-phase flow, proposed by Poettmann and Carpenter, was examined. The friction factor was correlated with density of mixture. Each of the curves, as shown in Fig. 2 and 3, shows maximum values. The maximum values may be plotted on friction factor-Dρυ curve, drawn by Poettmann and Carpenter. The curve corresponds with bubble flow at Dρυ below 1.0 and with slug flow above 3.0.
