The dependence of wall lubrication force on liquid velocity in turbulent bubbly two-phase flows

Nguyen, Van Thai; Song, Chul-Hwa; Bae, Byoung-Uhn; Euh, Dong-Jin

doi:10.1080/00223131.2013.807999

Cited by 13 publications

(4 citation statements)

References 39 publications

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“…Two different correlations were given for different pipe sizes, which means that the scale-up capability of the coefficients to small or large diameter system was not validated. Nguyen et al (2013b) concluded the effect of the lift coefficient could be negligible at low superficial liquid velocity conditions and a good agreement was obtained at high superficial velocity conditions with the reduced lift coefficient of 0.0066.…”

Section: Investigatorsmentioning

confidence: 62%

“…In the CFD simulation, Nguyen et al adopted a set of interfacial force models but the effects of the interfacial drag models on the two-phase flow parameter profiles were not discussed. Nguyen et al (2013b) developed an empirical correlation of the coefficients in wall lubrication force model for a fixed combination of the interfacial drag force models. The developed empirical constants in the wall lubrication force, which were nondimensionalized by the lift force coefficient, were in proportional to superficial liquid velocity.…”

Section: Investigatorsmentioning

confidence: 99%

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Vertical upward two-phase flow CFD using interfacial area transport equation

Chuang

Hibiki

2015

Progress in Nuclear Energy

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Section: Investigatorsmentioning

confidence: 62%

Section: Investigatorsmentioning

confidence: 99%

Vertical upward two-phase flow CFD using interfacial area transport equation

Chuang

Hibiki

2015

Progress in Nuclear Energy

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“…This force is called wall lubrication force. Nguyen et al [30] verified that liquid velocity relies on wall lubrication force. Therefore, the model of the wall lubrication force used in this part of the simulation was Tomiyama's equation [31]…”

Section: Wall Lubrication Forcementioning

confidence: 99%

Simulation Study on Gas Holdup of Large and Small Bubbles in a High Pressure Gas–Liquid Bubble Column

et al. 2019

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The computational fluid dynamics-population balance model (CFD-PBM) has been presented and used to evaluate the bubble behavior in a large-scale high pressure bubble column with an inner diameter of 300 mm and a height of 6600 mm. In the heterogeneous flow regime, bubbles can be divided into “large bubbles” and “small bubbles” by a critical bubble diameter dc. In this study, large and small bubbles were classified according to different slopes in the experiment only by the method of dynamic gas disengagement, the critical bubble diameter was determined to be 7 mm by the experimental results and the simulation values. In addition, the effects of superficial gas velocity, operating pressure, surface tension and viscosity on gas holdup of large and small bubbles in gas–liquid two-phase flow were investigated using a CFD-PBM coupling model. The results show that the gas holdup of small and large bubbles increases rapidly with the increase of superficial gas velocity. With the increase of pressure, the gas holdup of small bubbles increases significantly, and the gas holdup of large bubbles increase slightly. Under the same superficial gas velocity, the gas holdup of large bubbles increases with the decrease of viscosity and the decrease of surface tension, but the gas holdup of small bubbles increases significantly. The simulated values of the coupled model have a good agreement with the experimental values, which can be applied to the parameter estimation of the high pressure bubble column system.

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“…As the Frank model has not been confirmed in smaller or larger pipe diameters, a few later models are developed to extend the application range of this model. Nguyen et al 278 later investigated the coefficient in a larger diameter pipe and developed new correlations considering the superficial liquid velocity. Gao et al 276 modified the Frank et al model by considering the device dimension on wall lubrication force.…”

mentioning

confidence: 99%

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

Liu,

Wang,

Cai

et al. 2024

Ind. Eng. Chem. Res.

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The effective removal of gas phase species relies on effective gas liquid hydrodynamic contact coupling with fast chemical reaction rates. To promote mass transfer rate and the development of reagents, computational fluid dynamic modeling has long been recognized as an effective methodology for the quantification of physical and chemical parameters. The simulation of the gas liquid process involves the coupling of models including multiphase flow, turbulence, interfacial forces, mass transfer, and chemical reactions. The selection of suitable models according to practical applications has been challenging. In terms of multiphase flow, volume of fraction, Euler−Euler, and Euler−Lagrange approaches are discussed. With regard to turbulence, direct numerical simulation, large eddy simulation, and Reynolds averaged Navier−Stokes approach are compared. With respect to interfacial forces, the dominance of drag, lift, virtual mass, wall lubrication, and turbulent dispersion forces for different situations are obtained. In terms of mass transfer, the development and applications of film model, dimensionless analysis, penetration model, and surface renewal model are discussed. Different methodologies to enhance mass transfer include improvement of equipment structure, addition of nanofluid, and exposure to an energy field are summarized. To accelerate the computational process, four methods including the space−time conservation element and solution element model, compartmental model, reduction in dimension, and multiscale approach are discussed. This paper intends to provide a thorough review on the applications of different models to different situations and, in particular, to reveal the restrictions of different models. Overall, this study lays the foundation for future studies on the optimization of scrubbers for large scale practical applications. It also allows a deeper understanding of the interactions of fluid dynamics, mass transfer, and chemical reactions.

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The dependence of wall lubrication force on liquid velocity in turbulent bubbly two-phase flows

Cited by 13 publications

References 39 publications

Vertical upward two-phase flow CFD using interfacial area transport equation

Vertical upward two-phase flow CFD using interfacial area transport equation

Simulation Study on Gas Holdup of Large and Small Bubbles in a High Pressure Gas–Liquid Bubble Column

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

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