Simulation of a turbulent annulus with interfacial waves in core-annular pipe flow

Interfacial waves in core-annular pipe flow are studied through two-phase numerical simulations. Here the water annulus is turbulent, whereas oil core stays laminar. The low-Reynolds number Launder & Sharma k−ε model applied. By extracting moving wave shape from results and imposing this as a solid boundary single-phase simulation for gives (for pressure drop holdup ratio) that close agreement with values obtained approach. influence of amplitude length on hold up ratio then by using model. This insight appearance flow, where water-based Fanning wall-friction factor hold-up selected most important quantities. effect watercut eccentricity these quantities also investigated.