CFD simulation and experimental study of water-oil displacement flow in an inclined pipe

Jieheng, Zheng; Zhang, Weiming; Jiang, Junze; Guo, Rui

doi:10.18280/ijht.350326

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Since the oil layer is always positioned on the upper wall of the pipeline, the model is processed by mesh refinement near the wall. Through the analysis of the calculation results, the model established in this pape has improved the calculation speed by 15% compared to the previous oil-water flow model [2,4]. The divided cross-sectional mesh is shown in Figure 4.…”

Section: The Setting Of Numerical Simulation Parametersmentioning

confidence: 91%

“…It is therefore widely used. For example, when the temperature and water source conditions permit, the water displacement method is preferred [2].…”

Section: Introductionmentioning

confidence: 99%

“…At present, the research on the flow characteristic of water displacing oil in mobile pipelines mainly focuses on the oil-water mixed model [4][5][6][7] and mixed oil cutting technology [8,9]. Zhang et al [6] established an oil-water mixing model during the emptying process in a mobile pipeline based on the theory of the sequential transmission of refined oil products and two-dimensional convection diffusion, and taking into account the interaction between convection and turbulence.…”

Section: Introductionmentioning

confidence: 99%

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Oil–Water Hydrodynamics Model during Oil Displacement by Water in Down-Hill Mobile Pipeline

Li,

Fang,

Kou

et al. 2024

Processes

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In the process of water displacing oil within mobile pipelines, it is common that the oil tends to accumulate at the elevated sections of inclined pipelines, leading to an issue of residual oil accumulation. In this paper, the mechanism of carrying accumulated oil out of the pipeline with water flow is discussed. Taking the residual oil layer in down-hill pipelines as a research object, a hydrodynamic model of the water-oil displacement process is established based on the theory of liquid–liquid two-phase flow and the application of the momentum transfer equation. It has been found that the use of this model can enhance the computational speed by 15% without affecting the accuracy of the calculations. Subsequently, the model is used to analyze the impact of different initial water-phase velocities, inclination angles, initial oil-phase heights, and pipeline diameters on the oil-carrying process of water flow. The results indicate that increasing the initial water-phase velocity, the angle of inclination, and the initial oil-phase height all enhance the fluctuation in the oil–water interface, making it easier for the oil phase to be carried away from the pipeline. Conversely, when all other parameters are held constant, an increase in the pipeline diameter tends to stabilize the oil–water interface, thereby making it more difficult for the residual oil to be carried away by the water flow.

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Section: The Setting Of Numerical Simulation Parametersmentioning

confidence: 91%

“…It is therefore widely used. For example, when the temperature and water source conditions permit, the water displacement method is preferred [2].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oil–Water Hydrodynamics Model during Oil Displacement by Water in Down-Hill Mobile Pipeline

Li,

Fang,

Kou

et al. 2024

Processes

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Strategic optimization of phase-selective thermochemically amended terra-firma originating from excavation-squander for geogenic fluoride adsorption: a combined experimental and in silico approach

Nag

Mondal

Hirani

et al. 2022

Environ Sci Pollut Res

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Injection of a heavy fluid into a light fluid in a closed-end pipe

Akbari

Taghavi

2020

Physics of Fluids

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We report experimental results on the injection of a heavy fluid into a light one in a closed-end pipe, inclined at intermediate angles. The injection of the heavy fluid is made using an inner duct with a smaller diameter than that of the pipe in which the light fluid is placed. The fluids used are miscible and Newtonian, and they have the same viscosity. Our observation shows that, during the removal/replacement of the light fluid by the heavy fluid, at least four distinct flow stages can be identified: (i) initial buoyant jet of the heavy fluid, (ii) development of a mixing region, (iii) slumping flow of the heavy fluid, and (iv) heavy fluid front reaching the pipe end and returning toward the mixing region. Using high-speed camera images along with the ultrasound Doppler velocimetry and laser induced fluorescence data, the flow characteristics in these flow stages are quantified, and they are described in detail vs the dimensionless groups that govern the flow dynamics, namely, the Froude number (Fr), the Reynolds number (Re), the Archimedes number (Ar), and the pipe inclination angle (β). While our findings are of fundamental importance, they can also be used to provide a fluid mechanics understanding of the dump bailing method in the plug and abandonment (P&A) of oil and gas wells.

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CFD simulation and experimental study of water-oil displacement flow in an inclined pipe

Cited by 5 publications

References 19 publications

Oil–Water Hydrodynamics Model during Oil Displacement by Water in Down-Hill Mobile Pipeline

Oil–Water Hydrodynamics Model during Oil Displacement by Water in Down-Hill Mobile Pipeline

Strategic optimization of phase-selective thermochemically amended terra-firma originating from excavation-squander for geogenic fluoride adsorption: a combined experimental and in silico approach

Injection of a heavy fluid into a light fluid in a closed-end pipe

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