Experimental analysis of flow regimes and pressure drop reduction in oil–water mixtures

On the levitation force in horizontal core-annular flow with a large viscosity ratio and small density ratio

“…This does not seem to be consistent with what has been observed in horizontal core-annular flow experiments (see, for example, Sotgia et al, 20 where oil properties are similar to those used in the simulations). Contrary to the simulation results, in eccentric core-annular flow experiments the observed wave amplitude (and wavelength) is larger at the bottom.…”

Oil–water flows through sudden contraction and expansion in a horizontal pipe – Phase distribution and pressure drop

“…Owing to its industrial importance, both experimental and theoretical studies have been reported on different aspects of core annular flow. These include estimation of the stable range of flow (Hickox, 1971;Ooms et al, 1984;Preziosi et al, 1989;Bai et al, 1996;Joseph et al, 1997), pressure drop (Bai et al, 1992;Arney et al, 1993;Bannwart, 1998;Sotgia et al, 2008;Grassi et al, 2008), wettability characteristics of the pipe material (Arney et al, 1996;Santos et al, 2006;Silva et al, 2006), nozzle design (Parda and Bannwart, 2001) and restart procedure (Arney et al, 1996). Simultaneous efforts have also been made to understand the mechanism of core levitation from a fundamental point of view.…”

Experimental study on oil–water flow in horizontal and slightly inclined pipes

“…As another example, the modeling of corrosion-inhibitor transport in multiphase pipelines also involves determining the structure of the two-phase flow (Fairuzov, 2001;Fairuzov et al, 2000). In recent papers, Sotgia and Tartarini (2001) and Lovick and Angeli (2004) presented studies about the state of the art in horizontal oil-water flow (including viscous oils) and showed that there are still many discrepancies in two-phase pressure drop prediction. Even for the relatively simpler case when the oil viscosity is only a few times higher than water, there is no definitive model or correlation for predicting the two-phase pressure drop (Angeli and Hewitt, 1998;Valle and Utvik, 1997;Lovick and Angeli, 2001).…”