Dissolution of carbon dioxide bubbles and microfluidic multiphase flows

Sun, Ruopeng; Cubaud, Thomas

doi:10.1039/c1lc20348g

Cited by 80 publications

(71 citation statements)

References 47 publications

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“…16, which shows the absolute amount of CO 2 absorbed in a single unit cell along the channel length. As can be seen, the curves collapse on a single one (Sun and Cubaud, 2011) when the mass transfer distance is less than about 40 mm in the fast mass transfer zone, indicating very little difference in the amount of CO 2 absorption into liquid between different operating conditions. This clearly confirms the findings of Zaloha et al (2012), namely that the amount of heat or mass transferred between gas and liquid phases in a unit cell is independent of the superficial two-phase velocity.…”

Section: Dissolution Ratementioning

confidence: 81%

An online method to measure mass transfer of slug flow in a microchannel

Yao

Dong

Zhao

et al. 2014

Chemical Engineering Science

113

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Section: Dissolution Ratementioning

confidence: 81%

An online method to measure mass transfer of slug flow in a microchannel

Yao

Dong

Zhao

et al. 2014

Chemical Engineering Science

113

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“…Here, experimental data fit very well with the expression L 0 /d 0 = 0.45u -1 . This property is shared between liquid/ liquid and liquid/gas microfluidic multiphase flows in the absence of significant compressibility effects (Sun and Cubaud 2011). The initial distance between two consecutive droplets L 0 is used as a control parameter to describe droplet arrangements in the microfluidic chamber.…”

Section: Droplet Formationmentioning

confidence: 99%

Droplet arrangement and coalescence in diverging/converging microchannels

Jose

Cubaud

2011

Microfluid Nanofluid

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We experimentally examine the dynamics of droplet assembly and recombination processes in a twodimensional pore-model system. Monodisperse trains of droplets are formed by focusing streams of immiscible fluids into a square microchannel that is connected to a diverging/ converging slit microfluidic chamber. We focus on the limit of dilute emulsions and investigate the formation and stability of crystal-like structures when droplets are hydrodynamically coupled in the chamber. The minimal distance between droplets and the spread of droplet lattices are measured as a function of initial control parameters and the relationship between droplet velocity and trajectory is discussed. We demonstrate that the onset of coalescence depends on both the capillary number based on the viscosity of the external phase and the droplet concentration. The draining time of the thin film between droplets in apparent contact is found to depend on fluid characteristics. Such property allows us to examine the crossover between noncoalescing and coalescing droplet microflows by varying the residence time of the dispersion in the microfluidic chamber. This work characterizes droplet interaction and coalescence phenomena during multiphase transport in a simple extensional microgeometry.

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“…Multiphase transport in microchannels or porous media is of significant importance in many areas, such as microchemical engineering, 1,2 on-chip microfluidic analysis, 3,4 oil recovery, 5,6 CO 2 sequestration, 7,8 and fuel cells. 9 At the small scale, interactions between immiscible phases are mainly dominated by surface forces.…”

Section: Introductionmentioning

confidence: 99%

On the leakage flow around gas bubbles in slug flow in a microchannel

et al. 2015

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The leakage flow is that liquid does not push gas bubbles and leaks through the channel corners. This leakage flow was confirmed by tracking particles moving in the liquid film with a double light path method and was quantified by tracking the gas-liquid interface movement. The results show that leakage flow varies during bubble formation process. The average net leakage flow Q net-leak in a bubble formation cycle at T-junction can be as large as 62.4% of the feeding liquid flow rate, depending on the liquid properties. Q net-leak for regular flow at main channel is much smaller, ranging from about 0 to 30% of the feeding liquid flow rate. The difference between the two leakage flows would lead to an increase in liquid slug length after generation. Finally, the effects of parameters such as phase flow rates, surface tension, and viscosity were investigated.

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Dissolution of carbon dioxide bubbles and microfluidic multiphase flows

Cited by 80 publications

References 47 publications

An online method to measure mass transfer of slug flow in a microchannel

An online method to measure mass transfer of slug flow in a microchannel

Droplet arrangement and coalescence in diverging/converging microchannels

On the leakage flow around gas bubbles in slug flow in a microchannel

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