In this study, computational fluid
dynamics (CFD) simulation of
air–water two-phase flow in vertical pipe has been carried
out. Wide ranges of superficial liquid and gas velocities, 0.376–3.53
and 0.0036–1.275 m/s, and dispersed phase holdup range from
0.3 to 38.74% is used in the simulation. In this study, for drag,
lift, wall lubrication, and turbulent dispersion force the models
of Grace, Tomiyama, Hosokawa, and Burns are used, respectively. The
Eulerian–Eulerian multiphase approach with the k–ω shear stress transport (SST) turbulence model was
used. Bubble diameter is an essential parameter to perform the Eulerian
simulation. In the present study, we developed new correlation for
bubble diameter and with this predicted bubble diameter simulations
were performed. The developed CFD model is well capable of predicting
gas void fraction, interfacial area concentration, pressure drop,
gas/liquid velocity, and turbulent kinetic energy.