Very-viscous-oil/water/air flow through horizontal pipes: Pressure drop measurement and prediction

Review of oil–water through pipes

“…6, to promote a core-annular flow. The device has successfully generated a core-annular flow and managed to obtain flow pattern maps showing core-annular and oil-in-water dispersion regimes under wide range of input flow rates, as reported in Poesio et al [60]. A quite similar concept to generate core-annular flow has been designed by Hasson et al [85].…”

“…The main feature of core-annular flow is that it lowers pressure drop in a two-phase flow system. The study on core-annular flow has been investigated by Oliemans and Ooms [81], Bannwart [82], Grassi et al [61], Poesio et al [60], Ghosh et al [83], and Strazza et al [84]. The choice of the mixing device is an important step in the test planning in studying a core-annular flow of oilwater mixtures in pipes.…”

“…The choice of the mixing device is an important step in the test planning in studying a core-annular flow of oilwater mixtures in pipes. Therefore, Grassi et al [61] and Poesio et al [60] have designed an injection device, shown in Fig. 6, to promote a core-annular flow.…”

“…The case of high viscous oil-water in pipeline systems has appeared to play a paramount role in recent studies. Accordingly, many researchers [36,39,52,[60][61][62][63][64] have turned their attentions towards studying high viscous oil-water flow. Since it is known that liquid-liquid behaviour is characterized by the viscosity ratio, thus utilizing the works of low viscosity to high viscosity is not a straight forward step and hence the required parameters cannot be accurately predicted.…”

“…The pressure drop in oil-water flow has been studied thoroughly across horizontal, vertical and inclined angles [37,[59][60][61]72,100,102,118] with various operating conditions using different oil viscosity ranging from low to high viscosity. Changes of pressure gradient could be greatly related to phase inversion or flow pattern transitions [30].…”