Fluid Mechanical Aspects of the Gas-Lift Technique

Guet, S.; Ooms, G.

doi:10.1146/annurev.fluid.38.061505.093942

Cited by 71 publications

(37 citation statements)

References 94 publications

(116 reference statements)

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“…Bubbles, or other deformable particles, moving in clear liquids or liquid-solid mixtures are important in numerous fields such as oil and gas production [1,2], food processing [3], biotechnology [4], algae production [5] and the flow of blood inside the human body [6]. The shape, oscillation, path, and velocity of gas bubbles rising in clear liquids have been studied extensively [7][8][9][10].…”

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confidence: 99%

Dynamics of Single Rising Bubbles in Neutrally Buoyant Liquid-Solid Suspensions

et al. 2013

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We experimentally investigate the effect of particles on the dynamics of a gas bubble rising in a liquidsolid suspension while the particles are equally sized and neutrally buoyant. Using the Stokes number as a universal scale, we show that when a bubble rises through a suspension characterized by a low Stokes number (in our case, small particles), it will hardly collide with the particles and will experience the suspension as a pseudoclear liquid. On the other hand, when the Stokes number is high (large particles), the high particle inertia leads to direct collisions with the bubble. In that case, Newton's collision rule applies, and direct exchange of momentum and energy between the bubble and the particles occurs. We present a simple theory that describes the underlying mechanism determining the terminal bubble velocity.

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Dynamics of Single Rising Bubbles in Neutrally Buoyant Liquid-Solid Suspensions

et al. 2013

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“…The subscript e, d and c refer to the effective mixture viscosity, dispersion phase and continuous phase, respectively. In the past decades, many methods have been developed to predict the shear stress (s w ) based on the experimental data and the physical mechanism (see a review by Guet and Ooms, 2006). Descamps et al (2008) investigated the influence of air bubbles in liquid on the wall shear stress for the case of a vertical bubbly flow.…”

Section: Prediction Of the Pressure Gradient For Vertical Bubbly Flowsmentioning

confidence: 99%

Oil–gas–water three-phase upward flow through a vertical pipe: Influence of gas injection on the pressure gradient

Zhang

Liu

et al. 2012

International Journal of Multiphase Flow

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a b s t r a c tAn experimental study of three-phase flow in a vertical pipe with 50 mm diameter has been carried out. The experiments were conducted under the input superficial phase velocity: water from 0 to 0.885 m/s, oil from 0 to 0.90 m/s and gas from 0 to 0.85 m/s. In order to investigate the influence of gas injection on an oil-water two-phase flow, the average in situ phase fraction and pressure gradient were measured. The results showed that gas injection had little impact on the phase invasion and the phase inversion was still taking place at the same oil volume fraction. The average in situ gas fraction reached to its lowest value around the phase inversion point. In comparison to oil-water flow, the presence of gas decreased considerably the gravity pressure gradient and the total pressure gradient was reduced. However, when the input oil fraction was close to the phase inversion point, the contribution of frictional and gravity terms to the total pressure gradient became more equal, hence the total pressure gradient in three-phase flow could be higher than that in oil-water flow around the phase inversion region. In addition, several methods based on an oil-water flow as a single phase flow were evaluated to predict the pressure gradient of three-phase vertical bubbly flow. A good agreement was obtained between theory and data in this work and those in the literature.

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“…Bubbly flows are frequently observed in a wide range of industrial processes such as metal smelting, two-phase heat transfer, aeration and stirring reaction, fermentation reaction, mineral floatation, bubble column reaction, air conditioning engineering, wastewater treatment, and transportation lines [1][2][3]. In order to improve and enhance efficiency of the above engineering processes, it is very necessary and important to deeply understand hydrodynamics of bubbly flows.…”

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confidence: 99%

Study on Liquid Turbulence Modulation by Microbubbles in Different Turbulence Layers

Pang

Wei

2014

Advances in Mechanical Engineering

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Bubbly flows exist extensively in industrial processes. To enhance efficiencies of industrial processes, it is very necessary and important to understand detailedly mechanisms of liquid turbulence modulation by bubbles. To understand mechanisms of the liquid turbulence modulation by microbubbles, an Euler-Lagrange two-way model was used to investigate and analyze deeply the liquid turbulence modulation by microbubbles in the subviscous, buffer, and outer layers, respectively. The present results show that the liquid turbulence modulation by microbubbles is related to microbubble locations; the liquid turbulence is intensified when microbubbles are in the outer layers, whereas the liquid turbulence is suppressed when microbubbles are in the subviscous and buffer layer; and the drag reduction occurs only when microbubbles are in the buffer layer.

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Fluid Mechanical Aspects of the Gas-Lift Technique

Cited by 71 publications

References 94 publications

Dynamics of Single Rising Bubbles in Neutrally Buoyant Liquid-Solid Suspensions

Dynamics of Single Rising Bubbles in Neutrally Buoyant Liquid-Solid Suspensions

Oil–gas–water three-phase upward flow through a vertical pipe: Influence of gas injection on the pressure gradient

Study on Liquid Turbulence Modulation by Microbubbles in Different Turbulence Layers

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