Terminal velocities of clean and fully-contaminated drops in vertical pipes

Kurimoto, Ryo; Hayashi, Kosuke; Tomiyama, Akio

doi:10.1016/j.ijmultiphaseflow.2012.08.001

Cited by 47 publications

(27 citation statements)

References 32 publications

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“…The average terminal error of the simulations is 3.9% and 7.4%, with a standard deviation of 1.1% and 1.5%, respectively (see figure 3). Based on these results, the correlation of [71] appears to be an accurate tool to predictcalculate the terminal velocity of Taylor bubbles in vertical pipes, although the correlation of [37] predicts more accurately for air-water systems with Eo < 30. Furthermore, the dimensionless film thickness,h = h/d, is compared with the correlation of [44].…”

Section: Resultsmentioning

confidence: 96%

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A broadly-applicable unified closure relation for Taylor bubble rise velocity in pipes with stagnant liquid

Lizarraga-Garcia

Buongiorno²,

Al-Safran

et al. 2017

International Journal of Multiphase Flow

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Taylor bubble velocity in slug flow is a closure relation which significantly affects the prediction of liquid holdup (or void fraction) and pressure gradient in mechanistic models of slug flow for oil and gas pipe applications. In this work, we use a validated Computational Fluid Dynamics (CFD) approach to simulate the motion of Taylor bubbles in pipes; the interface is tracked with a Level-Set method implemented in a commercial code. A large numerical database is generated covering the most ample range of fluid properties and pipe inclination angles explored to date (Eo ∈ [10, 700], M o ∈ [1•10 −6 , 5•10 3 ], and θ ∈ [0 • , 90 • ]). A unified Taylor bubble rise velocity correlation is extracted from that database. The new correlation predicts the numerical database with 8.6% absolute average relative error and a coefficient of determination R 2 = 0.97, and other available experimental data with 13.0% absolute average relative error and R 2 = 0.84 outperforming existing correlations and models.

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Section: Resultsmentioning

confidence: 96%

“…For vertical pipes, the F r obtained numerically is compared with the results obtained using the correlations of [71] and [37]. The average terminal error of the simulations is 3.9% and 7.4%, with a standard deviation of 1.1% and 1.5%, respectively (see figure 3).…”

Section: Resultsmentioning

confidence: 99%

A broadly-applicable unified closure relation for Taylor bubble rise velocity in pipes with stagnant liquid

Lizarraga-Garcia

Buongiorno²,

Al-Safran

et al. 2017

International Journal of Multiphase Flow

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“…In literature, various studies either theoretical and/or experimental are done to account for the terminal bubble velocity. A good review for the main correlations for , to account for bubble terminal velocity, starting from the theoretical investigation of Dumitrescu (1943) and ending with the resent study of Kurimoto et al (2013) and is given by Morgado et al (2016).…”

Section: Taylor Bubble Rise Velocitymentioning

confidence: 99%

“…Values predicted from Viana et al (2003) correlations, and values from the recent correlation of Kurimoto et al (2013) are added to Figure 9 for comparison purposes. It can be seen that the proposed correlation agrees well with a wide range of correlations with a maximum deviation of ±10%.…”

Section: Taylor Bubble Rise Velocitymentioning

confidence: 99%

Numerical study of an individual Taylor bubble rising through stagnant liquids under laminar flow regime

et al. 2018

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Slug flow is one of the main flow regimes encountered in multiphase flow systems especially in oil and gas production systems. In the present study, the rise of single Taylor bubble through vertical stagnant Newtonian liquid is investigated by performing complete dimensionless treatment followed by an order of magnitude analysis of the terms of equations of motion. Based on this analysis, it is concluded that Froude, Eötvös and Reynolds numbers are the sole physical parameters influencing the dimensionless slug flow equations. Using the guidelines of the order of magnitude analysis, computational fluid dynamics simulation is carried out to investigate the dynamics of Taylor bubbles in vertical pipe using the volume-of-fluid (VOF) method. Good agreement with previous experimental data and models available in the literature is established confirming that the density ratio, viscosity ratio and the initial ratio of bubble size to pipe diameter (/) have minimal effect on the main hydrodynamic features of slug flow. Based on the developed results, correlations for the terminal velocity of the Taylor bubble and the dimensionless wall shear stress are proposed showing the significance of these main dimensionless parameters and support other important theoretical and experimental work available in the literature.

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“…Almatroushi & Ghannam [2] has carried out a study on droplet motion, surface active material, salt concentrations and polymer concentrations and concluded that the presence of NaCl in the aqueous phase increases the droplet translation velocity for all droplet sizes. Researchers such as Myint et al [3] and Kurimoto et al [4] claims that the initial shape deformation does not affect the terminal velocity due to strong viscous damping shape oscillations and that the surfactants in the external phase increase the drag co-efficient. Cai et al [5] deems that the drag coefficient of bubbles increases until the Reynolds number is about 1200, while Borhan & Pallinti [6] claims that the walls of the experimental setups affects the kinetics of the crude oil particle.…”

Section: Introductionmentioning

confidence: 99%

Terminal Velocity of Heavy Crude Oil in Aqueous Solution: Effects of pH and Salinity

Zameek¹,

Lim²,

Lau³

2016

IPCBEE

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Abstract.The terminal velocity and the flow behavior of heavy crude oil droplet motion within different aqueous solutions were studied in terms of pH level and aqueous salt concentration. Results showed that the density difference between the oil droplet and the external phase has a significant effect over viscosities and the interfacial tension of each phase. On the other hand, the terminal velocity of oil droplets expresses a negative deviation compared to the theoretical values due to impurities in the aqueous solutions. The present study was conducted for diameters ranging from 5.18 mm to 11.88 mm which resulted in Reynolds number ranging from 590.19 to 1678.18. The transitional phase of deformation for crude oil in pH solutions and salt solutions have been presented as 11-13 mm and 6-8 mm respectively.

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Terminal velocities of clean and fully-contaminated drops in vertical pipes

Cited by 47 publications

References 32 publications

A broadly-applicable unified closure relation for Taylor bubble rise velocity in pipes with stagnant liquid

A broadly-applicable unified closure relation for Taylor bubble rise velocity in pipes with stagnant liquid

Numerical study of an individual Taylor bubble rising through stagnant liquids under laminar flow regime

Terminal Velocity of Heavy Crude Oil in Aqueous Solution: Effects of pH and Salinity

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