A mechanistic model for two‐phase annular‐mist flow in vertical pipes

Yao, Shiwei; Sylvester, N. D.

doi:10.1002/aic.690330613

Cited by 14 publications

(7 citation statements)

References 9 publications

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“…The acting force on the droplet of surrounding fluid is bigger for more viscous gas from Eq. (10). Hence more viscous gas has enhanced the capacity in transporting the droplets back to the liquid film.…”

Section: The Effect Of Gas Viscositymentioning

confidence: 98%

“…The model was developed from small diameter and mostly air-water data and applied to the steady state upward gas-liquid flow. Both Yao and Sylvester [10] and Alves et al [11] also formulated mechanistic annular-mist models based on the two-fluid equations. Chen et al [12] presented a hybrid Eulerian-Lagrangian method for modeling annular flow and improved a stochastic-probabilistic model to track the droplets in the gas core.…”

Section: Introductionmentioning

confidence: 98%

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A probability model for fully developed annular flow in vertical pipes: Prediction of the droplet entrainment

Zhang

Liu

2015

International Journal of Heat and Mass Transfer

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Section: The Effect Of Gas Viscositymentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

A probability model for fully developed annular flow in vertical pipes: Prediction of the droplet entrainment

Zhang

Liu

2015

International Journal of Heat and Mass Transfer

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“…These include those of Lockhart and Martinelli (1949), Fauske (1961), Smith (1969), Zivi (1964), Tandon (1985, Chen (1986), Yao andSylvester (1987), Kabir and Hasan (1990), Beggs (1972) and Gomez et al (2000). The performance of Lockhart and Martinelli (1949), Zivi (1964), Tandon (1985, Chen (1986), Kabir and Hasan (1990) as well as Yao and Sylvester (1987) performed appreciably well but could not meet the criteria. The correlations by Fauske (1961), Smith (1969), Beggs (1972) and Gomez et al (2000) presented similar performances within the 20% error index.…”

Section: Comparison Of Correlation Predictions With Annular Flow Datamentioning

confidence: 98%

An assessment of gas void fraction prediction models in highly viscous liquid and gas two-phase vertical flows

Ribeiro

Liao

Aliyu

et al. 2020

Journal of Natural Gas Science and Engineering

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Gas void fraction plays a significant role in determination of several multiphase flow parameters. Good insight of its behaviour coupled with accurate prediction is imperative for design of efficient equipment which has the potential to translate to higher production rates in the petroleum industry. Against the background of the prevalence of higher viscous and imminent application of highly viscous liquids in the petroleum industry, air-water and air-low viscous liquid mixtures dominate gas void fraction research in vertical pipes. In this work, gas-liquid ( = 100 − 7000 ) mixtures are used to investigate the behaviour of gas void fraction in vertical pipes. The influence of superficial phase velocities and liquid viscosity are observed. Further, a combined database consisting of experimental and the reported data of Schmidt et al. (2008) is employed to evaluate the predictions of 100 existing correlations. The results indicate that the Hibiki and Ishii (2003) and Bestion (1990) correlations are the overall best and secondbest performing correlations. In the absence good performing correlations for churn and annular flows, two correlations each, based on drift flux and slip ratio, are developed respectively. Predictions from these correlations show good agreement with the database and comparable performance with the overall best correlations.

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“…Earlier models for annular flow were developed by Dukler 3 and Hewitt. 4 More recently, other models have been published by Hasan and Kabir, 5 Yao and Sylvester, 6 Oliemans et al, 7 Caetano, 8 and Alves et al 9 The physical mechanisms associated with annular flow have also been studied extensively. Turner et al 10 and Ilobi and Ikoku 11 studied the minimum gas velocity required for liquid removal from vertical gas wells.…”

Section: Introductionmentioning

confidence: 99%

Film-Thickness Distribution for Annular Flow in Directional Wells: Horizontal to Vertical

Paz

Shoham

1999

SPE Journal

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An experimental and theoretical investigation has been carried out on two-phase annular flow in inclined pipes. The study focused on the effect of the inclination angle on the liquid film thickness distribution. A conductance multiprobe instrument was utilized to measure the local liquid film thickness around half of the pipe periphery for inclination angles of 90°, 75°, 60°, and 45°from the horizontal. A simple analytical model has been developed for the prediction of the liquid film thickness at the top and bottom of the pipe. The model is applicable for the entire range of inclination angles, from horizontal to vertical. Good agreement is observed between the prediction of the model and the experimental data collected in this study and from the literature. Experimental ProgramDetails of the experimental facility used in this study are given by Paz. 27 The following is a brief description of the test facility and the instrumentation. Fig. 1. The left side shows the metering section of the liquid ͑water͒ phase, while the right side shows the metering line for the gas ͑air͒ phase. The test section is shown in the middle. It consists of a 9-ft ͑2.74-m͒ long, 2-in. ͑51-mm͒ inner diameter ͑ID͒ R-4000 polyvinyl chloride ͑PVC͒ transparent pipe. The gas and liquid phases from the respective metering sections are introduced into a mixing tee at the bottom of the test section. The mixture flows upward in the form of annular flow, passes through the conductance multiprobe instrument ͑CMPI͒ where film thickness distribution measurements are taken, and finally exits from the top into an atmospheric pressure tank for separation. The test section is capable of rotating through the entire range of inclination angles. Experimental Facility. A schematic description of the experimental test facility is shown inConductance MultiProbe Instrument. The local film thickness distribution was measured utilizing a CMPI. This instrument has been used extensively by other researchers. 12,[20][21][22][23]25 The CMPI consists of a 3.5-ft. ͑1.07-m͒ long section of 2-in. ͑51-mm͒ diam-*Now with Petró leos de Venezuela S.A.

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A mechanistic model for two‐phase annular‐mist flow in vertical pipes

Cited by 14 publications

References 9 publications

A probability model for fully developed annular flow in vertical pipes: Prediction of the droplet entrainment

A probability model for fully developed annular flow in vertical pipes: Prediction of the droplet entrainment

An assessment of gas void fraction prediction models in highly viscous liquid and gas two-phase vertical flows

Film-Thickness Distribution for Annular Flow in Directional Wells: Horizontal to Vertical

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