CFD simulations of gas-liquid-liquid three-phase co-current flow in horizontal pipe by tracking volume fractions using VOF model

Yaqub, Muhammad Waqas; Pendyala, Rajashekhar

doi:10.1088/1757-899x/458/1/012078

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…The general trend shows that the pressure drop increases with the gas and liquid superficial velocities. As per the previous studies, the pressure drop is significantly affected by the flow patterns. , The pressure drop trend at low superficial velocities of fluids is observed to be fluctuating. The reason for such a sudden increase and decrease in pressure drop at low superficial velocities is because of the occurrence of slug flow.…”

Section: Resultsmentioning

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: Resultsmentioning

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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“…In the VOF model, different fluid components share a set of momentum equations, and the phase interface of each computational unit can be tracked by introducing variable phase volume fractions. To study the corrosion of acid gas and amine liquid with different volume fractions in the pipeline, the VOF model is used for numerical simulation in this study [33][34][35]. The continuity equation, momentum equation and volume fraction equation used in the calculation are shown in Appendix A (Appendix A.1) [36].…”

Section: Methodsmentioning

confidence: 99%

Numerical Simulation of Acid Gas Distribution and Corrosion Characteristics in Connecting Pipe of Lean/Rich Amine Heat Exchanger

Shi

Lv²,

Zhipeng³

et al. 2022

Coatings

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In the high sulfur natural gas purification unit, the connecting pipe of a lean/rich amine heat exchanger is extremely susceptible to corrosion due to the acid gas and amine liquid condition. This work numerically investigated the gas–liquid flow and corrosion of the real-scale connecting pipeline with two horizontal sections, one vertical section and four elbow sections. The effect of acid gas holdup on the gas–liquid flow pattern, distribution of velocity and pressure, and corrosion rate was investigated using an experimental validated model. With an increase in the acid gas fraction from 0.03 to 0.12, the flow pattern of the horizontal section changes from bubbly flow to a stratified flow in the horizontal section, while the flow pattern of the vertical section and elbow section keeps bubbling, and the proportion of gas bubbles increases in the vertical section and all elbow sections. The maximum pressure gradient was observed on the top of the horizontal section. The most serious corrosion section was found out on the outlet of the first elbow section where the gas liquid flow starts to stratify, which is consistent with the measured minimum wall thickness. A solution measure for anti-corrosion acid gas in the pipeline was proposed by adding a bifurcated pipe to separate the acid gas in the first horizontal section. The accumulated acid gas was effectively thrown out from the outlet of the bifurcated pipe. This method provides a promising way to eliminate the acid gas in the pipe and avoid forming stratified flow, which is helpful for prolonging the service life of the pipe.

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“…In this study, 𝜌 𝑤𝑎𝑡𝑒𝑟 = 1000 kg/m 3 , 𝜇 𝑤𝑎𝑡𝑒𝑟 = 1 × 10 -3 N-s/m 2 , 𝜌 𝑎𝑖𝑟 = 1 kg/m 3 , and 𝜇 𝑎𝑖𝑟 = 1.48 × 10 -5 N-s/m 2 . The VOF method can also be used for more than two phases, for example, three phases; an example can be seen in Yaqub and Pendyala (2018), where the authors studied three phases of air, oil, and water.…”

Section: Appendix B: Csm Equationsmentioning

confidence: 99%

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Huang

2021

Computer aided Civil Eng

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This work provides a novel approach that combines computational fluid dynamics (CFD) with computational solid mechanics (CSM) to dynamically simulate the fully coupled hydroelastic interaction between nonlinear ocean waves and a submerged horizontal plate breakwater (SHPB). Based on a systematic series of simulations, it is shown that the wave damping performance of an SHPB can be evidently improved by an appropriate extent of deformation, which can be achieved through the design of its bending stiffness by varying elasticity and/or aspect ratio. The wave attenuation effect is found to be maximized when an SHPB has a deformation amplitude close to the incident wave amplitude. By accounting for the hydroelastic effect through the fully coupled CFD+CSM approach, this work presents a new computational technique that supports the design of deformable offshore and coastal structures.

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CFD simulations of gas-liquid-liquid three-phase co-current flow in horizontal pipe by tracking volume fractions using VOF model

Cited by 7 publications

References 9 publications

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

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

Numerical Simulation of Acid Gas Distribution and Corrosion Characteristics in Connecting Pipe of Lean/Rich Amine Heat Exchanger

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

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