This study numerically investigates the effect of the contact angle on the hydrodynamics of
liquid–liquid slug flow in a capillary with an internal diameter of 2.4 mm. The finite volume
method is used to solve the Navier–Stokes equation, and the volume-of-fluid method is
employed for interface capturing. The contact angle varies from 13 to 169. The aqueous
phase is observed as a continuous medium, the organic phase is in a dispersed phase at
low contact angles, and the aqueous phase is dispersed as a medium at high contact …