Review on gas–liquid–liquid three–phase flow patterns, pressure drop, and liquid holdup in pipelines

Yaqub, Muhammad Waqas; Ramasamy, M.; Rusli, Risza; Prasad, D. M. Reddy; Pendyala, Rajashekhar

doi:10.1016/j.cherd.2020.04.029

Cited by 15 publications

(2 citation statements)

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“…If the flow is moving from upward vertical to the horizontal direction, the liquid tends to reside with the inner wall, and gas goes to the outer wall due to the lower density; the same is the case for the horizontal to the vertically downward direction. , The upstream petroleum pipeline flow usually consists of gas, oil, and water. The simultaneous flow of phases adopts various flow patterns depending on the flow rate of fluids, physical properties, and the inner diameter of the pipe. ,− The three-phase flow through the 90° bends is much more complicated because of the addition of another liquid phase. The flow pattern in a straight pipe would be completely transformed during its flow through the bend.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Three-Phase Flow Regime Transition in a Large Diameter 90° Bend and the Resultant Pressure Drop Prediction

Yaqub

Pendyala

2022

Ind. Eng. Chem. Res.

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The use of 90° bend is common in pipeline networks to connect the horizontal and vertical pipes in different orientations. The gas–oil–water flow pattern experiences a significant change while flowing through the bend. The centrifugal and gravitational forces influence the upstream flow pattern and transform it into a different type in the downstream pipe. An experimental study is conducted to identify flow pattern transformation in horizontal to vertical upward bend having an (R/d) ratio of 1. Each phase velocity affects the flow patterns; hence, the superficial velocities have been varied in the range of 0.5–5, 0.08–0.36, and 0.08–0.36 m/s for gas, oil, and water, respectively. The three-phase flow patterns in the bend’s horizontal and vertical legs have been identified and discussed in detail. Flow regime transition maps are plotted, and the variation in flow patterns with the change in superficial velocities of fluids has been analyzed. The pressure drop has been analyzed, and the prediction model for total pressure drop across the bend has been developed. The comparison of the experimental and predicted results showed close agreement.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Three-Phase Flow Regime Transition in a Large Diameter 90° Bend and the Resultant Pressure Drop Prediction

Yaqub

Pendyala

2022

Ind. Eng. Chem. Res.

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“…For a relatively recent review of gas flotation see [1], and discussions of the capture of an oil drop by a gas bubble can be found in [2][3][4], for example. Oil-water-gas flows are also found in many other circumstances, such as in oil wells and pipelines [5].…”

Section: Introductionmentioning

confidence: 99%

Numerical Studies of Disperse Three-Phase Fluid Flows

Zeng

Velez

et al. 2021

Fluids

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The dynamics of a three-phase gas–liquid–liquid multiphase system is examined by direct numerical simulations. The system consists of a continuous liquid phase, buoyant gas bubbles, and smaller heavy drops that fall relative to the continuous liquid. The computational domain is fully periodic, and a force equal to the weight of the mixture is added to keep it in place. The governing parameters are selected so that the terminal Reynolds numbers of the bubbles and the drops are moderate; while the effect of bubble deformability is examined by changing its surface tension, the surface tension for the drops is sufficiently high so they do not deform. One bubble in a “unit cell” and eight freely interacting bubbles are examined. The dependency of the slip velocities, the velocity fluctuations, and the distribution of the dispersed phases on the volume fraction of each phase are examined. It is found that while the distribution of drops around a single bubble in a “unit cell” is uneven and depends on its deformability, the distribution of drops around freely interacting bubbles is relatively uniform for the parameters examined in this study.

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