Unified drift velocity closure relationship for large bubbles rising in stagnant viscous fluids in pipes

Moreiras, Jose; Pereyra, Eduardo; Sarica, Cem; Torres, Carlos F.

doi:10.1016/j.petrol.2014.09.006

Cited by 40 publications

(37 citation statements)

References 18 publications

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“…These observations are in agreement with the findings of other researchers (e.g. Gokcal et al (2008), Jeyachandra (2012), Moreiras et al (2014)). Reynolds numbers.…”

Section: Formulaton Of a New Simplified Drift Velocity Correlationsupporting

confidence: 94%

“…Following the pioneer works of Dumitrescu (1943) and Davies & Taylor (1950), many prediction formulae of drift velocity of elongated bubbles in stagnant liquid have been developed (Benjamin 1961;White & Beardmore 1962;Brown 1965;Wallis 1969;Tung and Parlange 1976;Weber 1981;Bendiksen 1984;Weber et al 1986;Hasan and Kabir 1988;Viana et al 2003;Gokcal et al 2008;Jeyachandra et al 2012;and Moreiras et al 2014). Unfortunately most of the available drift velocity models have applicability limitations and low predictive capabilities, either because they were established using a limited number of experimental data that scarcely account for the combined effects of viscosity, surface tension, and pipe inclination or, because of their formulation.…”

mentioning

confidence: 99%

“…Performance ofWeber et al (1986) drift velocity correlation on gathered experimental data More recently, several experimental campaigns have been performed byGokcal et al (2008),Jeyachandra (2012),Moreiras et al (2014). They all show that the viscosity has a large impact on the value of the drift velocity.…”

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confidence: 99%

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Simplified generalised drift velocity correlation for elongated bubbles in liquid in pipes

Livinus

Verdin

Lao

et al. 2018

Journal of Petroleum Science and Engineering

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Most of the existing drift velocity models have limitations, and sometimes low predictive capabilities, primarily because they are derived from experimental data which scarcely account for the combined effect of viscosity, surface tension and pipe inclination. Published data of drift velocity of elongated bubbles in pipes have been extracted from the open literature, and new data have been generated from Taylor bubble experiments conducted in a low pressure flow loop using nominal oil viscosities of 160cP and 1140cP in 0.099m and 0.057m internal diameter inclined pipes (1.0 to 7.5 degrees from horizontal). These data have been processed and a simplified generalised drift velocity correlation established. The evaluation of some existing elongated bubble rise velocity has also been carried out. The prediction of the drift velocity of a single elongated gas bubble in liquid in pipes can sometimes be overestimated by 20% or more, and sometimes be underestimated by 20% or more. It is shown that the new proposed simplified generalised correlation has an improved predictive capability when used to estimate the drift velocity of a bubble in stagnant liquid in a pipe.

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“…These observations are in agreement with the findings of other researchers (e.g. Gokcal et al (2008), Jeyachandra (2012), Moreiras et al (2014)). Reynolds numbers.…”

Section: Formulaton Of a New Simplified Drift Velocity Correlationsupporting

confidence: 94%

mentioning

confidence: 99%

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Simplified generalised drift velocity correlation for elongated bubbles in liquid in pipes

Livinus

Verdin

Lao

et al. 2018

Journal of Petroleum Science and Engineering

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“…The term translational velocity for multiphase flow studies is defined as the velocity at which a slug unit travels [1]. The slug unit refers to the combination of gas bubbles travelling along with alternating liquid slugs, generating the commonly known slug flow pattern.…”

Section: Translational Velocitymentioning

confidence: 99%

“…In the past few decades, all efforts of the oil and gas industry have shifted towards the extraction, transportation and refinement of heavier oils, as they represent nearly 70% of the actual available reserves of crude oil [1]. In the past, all crude oil extraction was focused almost exclusively on light oil reserves, as the exploration and drilling technologies were only available for low-viscosity fluids, which meant lesser costs associated with its production.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Drift Flux in Two-Phase Gas-Liquid Slug-Flow along Horizontal and Inclined Pipelines through Experimental (Non)-Newtonian and CFD Newtonian Approaches

Pico¹,

Valdés²,

Ratkovich³

et al. 2018

JFFHMT

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The objective of this study is to analyze the influence of the physical properties of Newtonian and Non-Newtonian fluids, such as density, effective viscosity and surface tension, as well as operational parameters of the piping, such as diameter, length and angle of inclination, on the drift velocity for twophase gas-liquid flow. This study comprises a Computational Fluid Dynamics (CFD) approach for Newtonian fluids and an experimental approach for both, Newtonian and Non-Newtonian fluids. The simulation model consisted of half a section of a circular pipe with a symmetry plane. This model was calibrated through a mesh independence test, which considered experimental and literature data as benchmarking values for both low and high viscosity Newtonian fluids. The results obtained through the CFD model showed good agreement with the experimental data gathered for the present study, keeping the experimental deviations under 10% for most (roughly 95%) of the cases considered. The relationship between the Froude number (Fr) and the Viscosity number (Nvis) was studied and an inverse exponential tendency was found for all the parameters and fluids tested, which agrees with the models proposed in literature. The data gathered for all fluids on the drift velocity's behavior against operational parameters such as length, diameter and inclination, showed the influence of the governing forces for each case based on dimensionless analysis using Eötvös (Eö) and Reynolds (Re) numbers. For dominant capillary or viscous forces on the system, the drift velocity changed with the variation of these parameters. However, it was found that for dominant inertial and gravitational forces, the drift velocity maintained a constant value regardless of the operational settings. Finally, it was observed that the rheological nature found for the Non-Newtonian fluids has a significant influence on the drift velocity's behavior, deviating its patterns from the Newtonian fluids as the effective viscosity changed.

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Evaluation of drift-velocity closure relationships for highly viscous liquid-air slug flow in horizontal pipes through 3D CFD modelling

Valdés

Pico

Pereyra

et al. 2020

Chemical Engineering Science

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Unified drift velocity closure relationship for large bubbles rising in stagnant viscous fluids in pipes

Cited by 40 publications

References 18 publications

Simplified generalised drift velocity correlation for elongated bubbles in liquid in pipes

Simplified generalised drift velocity correlation for elongated bubbles in liquid in pipes

Analysis of the Drift Flux in Two-Phase Gas-Liquid Slug-Flow along Horizontal and Inclined Pipelines through Experimental (Non)-Newtonian and CFD Newtonian Approaches

Evaluation of drift-velocity closure relationships for highly viscous liquid-air slug flow in horizontal pipes through 3D CFD modelling

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