Pressure gradient in horizontal liquid–liquid flows

Angeli, Panagiota; Hewitt, Geoffrey F.

doi:10.1016/s0301-9322(98)00006-8

Cited by 155 publications

(109 citation statements)

References 25 publications

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“…In the two-fluid model the flow parameters are estimated from the combined momentum equations for steady-state flow. Thus, eliminating the pressure drop from the momentum equations of each phase (Angeli et al, 1998;Rodriguez et al, 2006):…”

Section: Flow Pattern Dependent Prediction Modelsmentioning

confidence: 99%

“…Equation (6) is a non-linear equation which can be solved for the liquid level or hold-up using a standard numerical method if the shear stresses are expressed in terms of known friction factors. The additional relationships required for estimating geometric parameters and the closure relations for wall and interfacial shear stresses can be found in Angeli et al (1998) and Rodriguez et al (2006). The pressure gradient is subsequently calculated by inserting the calculated hold-up values into the one-dimensional differential equations of momentum for oil or water.…”

Section: Flow Pattern Dependent Prediction Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Pressure drop, flow pattern and local water volume fraction measurements of oil–water flow in pipes

Kumara¹,

Halvorsen²,

Melaaen³

2009

Meas. Sci. Technol.

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Abstract. Oil-water flow in horizontal and slightly inclined pipes was investigated. The experimental activities were performed using the multiphase flow loop at Telemark University College, Porsgrunn, Norway. The experiments were conducted in a 15 m long, 56 mm diameter, inclinable steel pipe using Exxsol D60 oil (density of 790 kg/m 3 and viscosity of 1.64 mPa s) and water (density of 996 kg/m 3 and viscosity of 1.00 mPa s) as test fluids. The test pipe inclination was changed in the range from 5° upward to 5° downward. Mixture velocity and inlet water cut varies up to 1.50 m/s and 0.975, respectively. The time averaged cross sectional distributions of oil and water were measured with a single-beam gamma densitometer. The pressure drop along the test section of the pipe was also measured. The characterization of flow patterns and identification of their boundaries are achieved via visual observations and by analysis of local water volume fraction measurements. The observed flow patterns were presented in terms of flow pattern maps for different pipe inclinations. In inclined flows dispersions appear at lower mixture velocities compared to the horizontal flows. Smoothly stratified flows observed in the horizontal pipe disappeared in upwardly inclined pipes and new flow patterns, plug flow and stratified wavy flow were observed. The water-inoil dispersed flow regime slightly shrinks as the pipe inclination increases. In inclined flows the dispersed oil-in-water flow regime extended to lower mixture velocities and lower inlet water cuts. The present experimental data were compared with results of a flow pattern dependent prediction model, which uses the area averaged steady state two-fluid model for stratified flow and the homogeneous model for dispersed flow. The two-fluid model was able to predict the pressure drop and water hold-up for stratified flow. The homogeneous model was not able to predict the pressure profile of dispersed oil-water flow at higher water cuts. The two-fluid model and homogeneous model over-predicts the pressure drop for dual continuous flow.

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Section: Flow Pattern Dependent Prediction Modelsmentioning

confidence: 99%

Section: Flow Pattern Dependent Prediction Modelsmentioning

confidence: 99%

Pressure drop, flow pattern and local water volume fraction measurements of oil–water flow in pipes

Kumara¹,

Halvorsen²,

Melaaen³

2009

Meas. Sci. Technol.

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“…For this purpose, a series of experiments were conducted by Russell [2] (1959), Charles [3] (1961), Guzhov [4] (1973), Malinowsky [5] (1975), Oglesby [6] (1979), Martinez [7] (1983), and Arirachakaran [8] (1989), to name but a few. From 1990 onward, the following scholars realized more accurate measurement of various parameters of flow patterns, and objective analysis of the flow patterns of oil-water two-phase flow thanks to the advancement of instrument and technology: Trallero [9] (1995), Trallero and Brill [10] (1996), Nadler and Mewes [11] (1997), Angeli and Hewitt [12] (1998), Shi and Jepson [13] (1999), Angeli and Hewitt [14] Trallero (1995), the oil-water two-phase flow patterns could be classified into two categories: the segregated flows (ST; ST&MI) and dispersed flows (Do/w&w; O/w; Dw/o&Do/w; W/o). In the dispersed flows, the oil and water are expected to be fully mixed and the degree of homogenization is so high that the oil-water slippagevelocity reaches zero.…”

Section: Introductionmentioning

confidence: 99%

Water holdup in no-slip oil-water two-phase stratified flow

Fu¹,

Liu²,

Liao³

2017

IJHT

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This paper develops a water holdup calculation model based on flow characteristics for no-slip oil-water twophase flow. The model is constructed in consideration of two flow patterns: the stratified flow (ST) and the stratified flow with some mixing at the interface (ST&MI). The predicted values obtained by the model are compared with the test data on white oil-water flow. The results show that the model can accurately predict the water holdup of no-slip oil-water two-phase flow, which is of great significance for the determination of the working parameters in oilfields.

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“…Nädler and Mewes [5] made a detailed classification for horizontal oil-water two-phase flow in a 59mm-ID pipe and proposed two new flow patterns that were never described by the former researchers. Angeli and Hewitt [6][7] conducted horizontal oil-water two-phase flow experiments in non-corrosive steel pipe and acrylic pipe, and three new stratified flow patterns were observed and defined. Now, it is generally acknowledged as the horizontal oil-water two-phase flow pattern definition proposed by Trallero et al [4].…”

Section: Introductionmentioning

confidence: 99%