Single-beam gamma densitometry measurements of oil–water flow in horizontal and slightly inclined pipes

Kumara, W.A.S.; Halvorsen, Britt; Melaaen, Morten C.

doi:10.1016/j.ijmultiphaseflow.2010.02.003

Cited by 67 publications

(80 citation statements)

References 25 publications

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“…In the following study, to unify the definition of flow patterns in the literature, the flow patterns can be grouped into the following types: [12] Segregated flow, where two fluids flow in separate layers owing to different densities, including dual continuous flow (DC), stratified flow (ST), and stratified flow [6] 0.056…”

Section: Data Matrixmentioning

confidence: 99%

“…The percent standard deviation, E 3 : [19] 22.6 22.6 17.6 16 Charles et al [20] À5.2 8.9 11.6 24 Kumara et al [6] 7.4 8.9 6.9 23 Lovick and Angeli [22] 17.4 17.9 21.2 72 Oddie et al [23] À0.3 0.3 10.4 8 Rodriguez et al [25] À1.5 1.5 1.4 34 Rodriguez and Oliemans [9] 15.5 15.6 11.5 10 Rodriguez and Baldani [24] 47.5 47.5 6.1 6 Russell et al [26] À8.2 10.3 9.9 16 Sunder Raj et al [27] 1.8 6.4 7.7 87 Trallero et al [28] 17.4 17.9 18.5 36 Xu et al [10] À0.8 13.8 18.1 198 Figure 7. Input water fraction against the slip velocity ratio and water holdup in vertically dispersed flows.…”

Section: Model Developmentmentioning

confidence: 99%

“…Effects of the mixture flow velocity on the slip velocity ratio and water holdup at a constant input water fraction (b W ¼ 0.5) in the small inclined flows from À58 to 58 (data from Kumar et al [6] ). Abduvayt et al [4] 8.1 14.0 20.5 116 Atmaca et al [5] 3.8 11.6 15.8 83 Flores et al [1] À8.0 8.3 10.0 89 Kumara et al [6] 1.6 15.5 31.5 22 Lum et al [7,8] À0.3 10.3 22.0 121 Mukherjee et al [2] À2.6 8.0 15.1 228 Oddie et al [23] À1.6 6.3 7.1 8 Rodriguez and Oliemans [9] 14.1 19.6 24.1 19 Rodriguez and Baldani [24] 36.2 38.7 25.1 17 Vigneaux et al [3] À11.0 11.1 6. 5 25 can give a reasonable performance with 98 % of the data having an average absolute error less than 20 %.…”

Section: Inclined Flowmentioning

confidence: 99%

See 2 more Smart Citations

Characteristics of water holdup for oil and water mixture flows in horizontal, vertical, and inclined pipes

Liu

Zhang

et al. 2016

Can J Chem Eng

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In this work, the water holdup and slippage for oil and water mixture flows in horizontal, vertical, and inclined pipes have been investigated. A large group of experimental data was collected from 21 different sources covering the whole range of inclination angles from À908 to 908 to reveal the holdup characteristics and develop the drift velocity model. The results show that in horizontal flows the water holdup is dependent to the flow pattern, and yet in vertical flows the water holdup is similar to the input one and the flow direction shows a few influences on the holdup. In inclined flows, the Froude numbers are relatively independent of inclination angles when the angles are greater than 308. Therefore, the changes of water holdup in the pipe with small inclination angles are more severe than those with large inclination angles. In addition, a satisfactory agreement between predicted and experimental holdups substantiates the general validity of the proposed drift velocity correlation for oil and water flows, especially for those with large inclination angles.

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Section: Data Matrixmentioning

confidence: 99%

Section: Model Developmentmentioning

confidence: 99%

Section: Inclined Flowmentioning

confidence: 99%

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Characteristics of water holdup for oil and water mixture flows in horizontal, vertical, and inclined pipes

Liu

Zhang

et al. 2016

Can J Chem Eng

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“…The basic principle of gamma-ray absorption measurement is based on fact that the intensity of a collimated gamma beam decreases as it passes through matter [8].…”

Section: Application Of Gamma-ray Absorption To Liquid-solids Flow Inmentioning

confidence: 99%

Application of the phase method in radioisotope measurements of the liquid - solid particles flow in the vertical pipeline

Hanus

Zych

Petryka

et al. 2015

EPJ Web of Conferences

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Abstract. The paper presents idea and an application of the gamma-absorption method to a two-phase flow investigation in a vertical pipeline, where the flow of solid particles transported by water was examined by a set of two 241 Am radioactive sources and probes with NaI(Tl) scintillation crystals. In the described experiments as solid phase the ceramic models representing natural polymetallic ocean nodules were used. For advanced analysis of electrical signals obtained from detectors the phase of cross-spectral density function has been applied. Results of the average solid-phase velocity measurements were compared with one obtained by application of the classical cross-correlation. It was found that the combined uncertainties of the velocity of solid particles evaluation in the presented experiment did not exceed 0.6% in phase method and 3.2% in crosscorrelation method.

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“…where J 0 is the inlet to absorbent radiation intensity, J is the outlet intensity detected after the beam has traveled a distance x through the absorbing materials, Ș and μ represents consequently the density and mass absorption coefficient of these materials [7]. If the basic equation is applied to an air-water mixture flow then the corresponding expression is:…”

Section: Gamma-absorption In Two-phase Flow Evaluation and Laboratorymentioning

confidence: 99%

Velocity measurements of the liquid - gas flow using gamma absorption and modified conditional averaging

Hanus

Zych

Kowalczyk

et al. 2015

EPJ Web of Conferences

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Abstract. The paper presents idea and an exemplary application of gamma-absorption in the measurement of gas bubbles transportation in a gas-liquid mixture flow through a horizontal pipeline. In the tests on laboratory installation two 241 Am radioactive sources and probes with NaI(Tl) scintillation crystals have been used. For analysis of electrical signals obtained from detectors the modified conditional averaging of the absolute value of delayed signal (CAAV) is proposed. The proposed method is based on the quotient of classical crosscorrelation (CCF) and CAAV. Results of the time delay estimation and gas-phase velocity measurements are compared with one obtained using CCF. The combined uncertainties of the mean velocity of air bubbles evaluation in the presented experiment did not exceed 2.1% (CCF) and 1.7% (CCF/CAAV), which is a satisfactory result in industrial applications.

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Single-beam gamma densitometry measurements of oil–water flow in horizontal and slightly inclined pipes

Cited by 67 publications

References 25 publications

Characteristics of water holdup for oil and water mixture flows in horizontal, vertical, and inclined pipes

Characteristics of water holdup for oil and water mixture flows in horizontal, vertical, and inclined pipes

Application of the phase method in radioisotope measurements of the liquid - solid particles flow in the vertical pipeline

Velocity measurements of the liquid - gas flow using gamma absorption and modified conditional averaging

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