Fluids with different properties would exhibit different flow behaviour in any multiphase flow system at a given operating condition. Therefore, an in-depth knowledge of the operational and flow behaviour of any known fluid properties in a multiphase flow system of either liquid-liquid two-phase flow (oil and water) or gas-liquid-liquid three-phase flow (gas, oil and water) would be helpful in designing of pipelines and optimization of the production, separation, transportation and distribution systems, as may be found in oil and gas and allied petro-chemical industries. This paper presents the experimental observation of the flow patterns and water holdup for a two-phase low viscosity oil-water flow in horizontal pipes. The test fluids comprised of tap water and 2D-diesel which has a density of 832 kg/m3, viscosity of 3.24 mPa.s, surface tension of 0.030 N/m and flash point of 79°C. A total of 30 runs has been accomplished and the experimental results showed three different flow patterns identified as stratified flow (ST), stratified flow with mixing interface (ST&MI) and water-in-oil dispersed flow (), with superficial velocities of oil and water in the ranges of 0.32 - 0.87 m/s (Vos) and 0.20 - 0.90 m/s (Vws), respectively. However, analysis of water holdup in the commingled flows of the test fluids showed its dependency on the fluid flow patterns and superficial velocity of water.
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机译：在给定的运行条件下，具有不同特性的流体在任何多相流系统中都会表现出不同的流动特性。因此，您需要深入了解液-液两相流（油和水）或气-液-液三相流（气，石油和水）将有助于管道的设计以及生产，分离，运输和分配系统的优化，如在石油和天然气及相关石化行业中可能会发现的那样。本文介绍了水平管中两相低粘度油水流的流型和持水率的实验观察。测试流体由自来水和2D柴油组成，密度为832 kg / m3，粘度为3.24 mPa.s，表面张力为0.030 N / m，闪点为79°C。总共完成了30次运行，实验结果表明，三种不同的流动模式分别为：分层流（ST），带混合界面的分层流（ST＆MI）和油包水分散流（），且油的表面速度为水分别在0.32-0.87 m / s（Vos）和0.20-0.90 m / s（Vws）的范围内。但是，对测试流体混合流中的持水率的分析表明，其对流体流型和水表观速度的依赖性。
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