Experimental Investigation of Two-Phase Flow Patterns in a Vertical to Horizontal Bend Pipe Using Wire-Mesh Sensor

Abdulkareem, Lokman A.; Musa, Veyan A.; Mahmood, Raid Ahmed; Hasso, Ezideen A.

doi:10.37358/rc.20.12.8383

Cited by 10 publications

(9 citation statements)

References 19 publications

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“…Some recorded void fractions are deleted due to some problem-related electricity issue and sensor themselves. The judgment of the classification of the two-phase patterns in the current tests isbased on the results of investigators in [1], [11], [15], [20]…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the study clearly explains the flow regimes for gas-liquid flow using PDF the holding up of liquid in the time-series domain and PSD is used for flow identification in transparent inclined pipes,Abdulkareem [15]. A common technique was developed for the non-intrusive imaging technology and it was used to visualize the distribution of cross-sectional permittivity, for contents in a dielectric pipe regarding the capacitance of the measured data.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Comparison Between Wire Mesh and Electrical Capacitance Tomography Sensors to Predict a Two-Phase Flow Behaviour and Patterns in Inclined Pipe

Hameed¹,

Abdulkareem²,

Mahmood³

2021

Technium

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Two-phase flow behaviour and its flow patterns have a significant effect in many applications in industry. Oil-gas is one of the two-phase flow types that have many applications in petroleum and power stations. An oil-gas two-phase flow behaviour and flow patterns have been investigated in an inclined pipe using two different tomography sensors: Wire Mesh sensor (WMS) and Electrical Capacitance Tomography (ECT). A special experimental facility was designed and built to operate the tow-phase flow application in the inclined pipe with the various angle of inclination. A set of experimental data were collected using operating conditions which covered a two-phase flow range of superficial velocity of gas (Usl) from 0.05 to 0.52 m/s and superficial velocity of liquid (Usg) from 0.05 to 4.7 m/s at atmospheric pressure and room temperature. Three inclined angles to change the pipe’s inclination 45, 60, and 80-degree were applied in the experiments. The Comparison between the Wire Mesh Sensor (WMS) and Electrical Capacitance Tomography (ECT) was completed experimentally. The results revealed that there is a good agreement between the two sensors, however; the WMS had a higher frequency which was calculated 1000 frames per second compared with the ECT which worked at 200 frames per second.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Comparison Between Wire Mesh and Electrical Capacitance Tomography Sensors to Predict a Two-Phase Flow Behaviour and Patterns in Inclined Pipe

Hameed¹,

Abdulkareem²,

Mahmood³

2021

Technium

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“…In comparison, the volume of fluid (VOF) method, which flexibly and effectively handles complex interface configurations, is one of the most commonly and used application methods in numerical simulations of two-phase flow. , With the assistance of the VOF method, Gao et al numerically investigated the two-phase flow structures in a straight pipe, and their results agreed well with the flow regimes from experimental data presented by Mandhan et al Akhlaghi et al utilized the VOF model to simulate air–water intermittent slug and plug flow in a horizontal pipe and concluded that the ratio of the gas slug length to the liquid slug length increased with an increase in the gas superficial velocity. Qiao et al and Abdulkareem et al discussed the two-phase flow characteristics in a 90° vertical elbow pipe. Their results revealed that stratified–wavy flow was the dominant flow pattern in a horizontal pipe and that bubbly flow, plug flow, slug flow, and wavy–annular flow were also observed with an increase in the gas volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Gas–Liquid Metal Two-Phase Flow in a Multiple-Entrance Magnetohydrodynamic Generator

Wang

Huang

et al. 2022

Ind. Eng. Chem. Res.

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To achieve high efficiency for a magnetohydrodynamic (MHD) generator, this study proposed a multiple-entrance channel and numerically investigated its dynamic spatial−temporal characteristics, evolution processes, and transport mechanisms for gas−liquid metal two-phase flow with and without an external magnetic field using the volume of fluid (VOF) model for interface tracking. When considering gravity, slug flow, annular flow, columnar flow, bubblelike flow, and stratified flow were observed in sequence with different inlet gas volume fractions, inlet gas velocity ratios, and magnetic field intensities. In the absence of a magnetic field, the flow instability was enhanced with an increase in the inlet gas volume fraction. When the volume fraction ratio of gas to liquid metal was 7:3 and the inlet gas velocity ratios was 0.46, the efficient gas carrying of liquid metal was beneficial for obtaining a more stable output power. The liquid metal velocity was uniform in the generator channel with an average velocity of 0.651 m•s −1 , and the volume-average volume fraction of liquid metal in the generator channel reached 0.3641 within one period. When the generator channel was subjected to a magnetic field, the capacity of gas to carry the liquid metal was reduced, and the liquid metal velocity decreased, but the deformation of the phase interface was smooth owing to the MHD suppression effect. As the magnetic field intensity increased, the length of the stratified flow region and the volume fraction of liquid metal in the generator channel increased, however, a decrease of the liquid metal velocity also occurred. When the magnetic field intensity was 1 T, the average liquid metal velocity decreased by 13.8%, and the volume-average volume fraction of liquid metal increased by 9.59% in the generator channel compared with that without MHD effect. In addition, the 3D spatial−temporal evolution period of the flow pattern was shortened with an increase of the magnetic field intensity, and the result was obtained by estimating the power spectral densities (PSDs) of the periodic signals of the flow velocity and the liquid metal volume fraction.

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“…Lately, many techniques were used in researches to identify the distribution of two-phase inside pipes at different orientations, like Wire-Mesh Sensor (WMS) [23,24], X-ray Tomography [25]. However, the pressure drops in different orientations using oil-gas two-phase flow were not presented sufficiently.…”

Section: Introductionmentioning

confidence: 99%

Flow Patterns of Oil-Gas and Pressure Gradients in Near-Horizontal Flow Pipeline: Experimental Investigation Using Differential Pressure Transducers

Musa¹,

Mahmood²,

Khalifa³

et al. 2021

IJHT

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The current investigation aimed to identify pressure gradients and to study the fully developed flow patterns of oil-gas as a blend in a pipe of internal diameter 50 mm and 6 m length with different orientations of 0, 30, and 45-degree. The study was performed at constant values of liquid superficial velocities 0.052, 0.157, 0.262, 0.314, 0.419, and 0.524 m/s, and inlet superficial velocities of gas were ranged from 0.05 to 4.7 m/s at atmospheric pressure. Two pressure transducers located up and downstream were used to measure pressure drops inside the tested pipe. Flow patterns were derived by using the correlation between pressure gradients and time series, the Probability Density Function of differential pressures, pressure gradients with gas superficial velocities, and total pressure losses with mean void fractions. The flow patterns of oil-gas were observed as a uniform stratified flow in the pipe on a 0-degree orientation at various superficial velocities. Stratified, wavy, and slug flow patterns were observed at 30-degree orientation, whereas, bubbly, slug, and churn flow patterns were observed in the pipe of 45-degree orientation. The experiment also showed that pressure drop gradients decreased with increased void fractions, gas superficial velocities, and degree rotations of the flow lines. Finally, the validation of using pressure transducers as a technique for estimating the flow patterns of two-phase flow showed acceptable results with some kind of patterns.

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Experimental Investigation of Two-Phase Flow Patterns in a Vertical to Horizontal Bend Pipe Using Wire-Mesh Sensor

Cited by 10 publications

References 19 publications

Experimental Comparison Between Wire Mesh and Electrical Capacitance Tomography Sensors to Predict a Two-Phase Flow Behaviour and Patterns in Inclined Pipe

Experimental Comparison Between Wire Mesh and Electrical Capacitance Tomography Sensors to Predict a Two-Phase Flow Behaviour and Patterns in Inclined Pipe

Numerical Investigation of Gas–Liquid Metal Two-Phase Flow in a Multiple-Entrance Magnetohydrodynamic Generator

Flow Patterns of Oil-Gas and Pressure Gradients in Near-Horizontal Flow Pipeline: Experimental Investigation Using Differential Pressure Transducers

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