“…The between ɛ(L) values higher than 0.2 (for air/heavy oil for horizontal , air/water, and air/oil for horizontal and upward inclinations), 0) proposed a correlation to predict high liquid holdup values for r correlations to predict high liquid holdup also were proposed by han 0.8 and Al-Safran et al, (2015) with ɛ(L) higher than 0.6 using air ontal pipe [40][41][42]. Some of the cited correlations depend on the and the inertial forces [33,35,36,[40][41][42], while other correlations (1984), Hamersma and Hart (1987), Bestion (1990) and Ishii (1977) heir proposed correlations are influenced by the gas-liquid velocity 34,[37][38][39]. similarity between different experimental setups, dimensionless ber (Re) is usually used; also it is used to scale between multiphase es operating on a gas-liquid multiphase flow system are the inertial on between these two forces are inherent in a Reynold number (Re) odel is proposed which is based on the relation between the liquid the two phases (i.e., the liquid and the gas).…”