Mixing of viscous immiscible liquids. Part 1: Computational models for strong–weak and continuous flow systems

DeRoussel, P.; Khakhar, D. V.; Ottino, Julio M.

doi:10.1016/s0009-2509(01)00163-4

Cited by 37 publications

(18 citation statements)

References 50 publications

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“…They travel linearly on the 12 electrode path by applying a voltage on electrodes and can be approached as shown on Figure 3. After approaching droplets in a close position as in Figure 3(d), droplets relax deformations due to displacement by draining the hexadecan film between interfaces during tens of seconds 18 and after, a steady state is reached. A membrane is formed within the contact area between droplets (Figure 3(e)).…”

Section: A Droplet Motion Membrane Formation and Displacement Leafmentioning

confidence: 98%

Handling of artificial membranes using electrowetting-actuated droplets on a microfluidic device combined with integrated pA-measurements

Martel

Cross

2012

Biomicrofluidics

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Artificial membranes, as a controllable environment, are an essential tool to study membrane proteins. Electrophysiology provides information about the ion transport mechanism across a membrane at the single-protein level. Unfortunately, highthroughput studies and screening are not accessible to electrophysiology because it is a set of not automated and technically delicate methods. Therefore, it is necessary to automate and parallelize electrophysiology measurement in artificial membranes.Here, we present a first step toward this goal: the fabrication and characterization of a microfluidic device integrating electrophysiology measurements and the handling of an artificial membrane which includes its formation, its displacement and the separation of its leaflets using electrowetting actuation of sub-lL droplets. To validate this device, we recorded the insertion of a model porin, a-hemolysin.

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Section: A Droplet Motion Membrane Formation and Displacement Leafmentioning

confidence: 98%

Handling of artificial membranes using electrowetting-actuated droplets on a microfluidic device combined with integrated pA-measurements

Martel

Cross

2012

Biomicrofluidics

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“…30 Some studies also reported the effects of mixing on coalescence. [31][32][33][34] Droplet coalescence in chaotic mixing flows has not been studied previously, although Muzzio and Ottino 35 predicted increased rate of coagulation of massless tracer particles in a model chaotic flow, that of blinking vortex system. 36 In this work, we first investigated, using simplified models, coalescence of equal size droplets suspended in a continuous fluidic medium subjected to simple shear flow.…”

Section: Steps In Coalescencementioning

confidence: 99%

“…44 Equations 7 -11 can also be used to obtain an expression relating the contact angle at collision ␣ 0 , and the contact angle at coalescence ␣ 1 . In view of this, a critical angle of collision (␣ 0 ϭ ␣ cr ) 32 can be found by taking ␣ 1 ϭ /2. It is assumed that coalescence is complete when the droplets fuse together to form a dumbbell.…”

Section: Steps In Coalescencementioning

confidence: 99%

Coalescence of immiscible polymer blends in chaotic mixers

Perilla

Jana

2005

AIChE Journal

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“…[17] It could be seen that the higher the mechanical shear involved and the lower the interfacial tension, the greater is the ease of drop break up [18] and the smaller is the size of resulting drops. [19] However it is believed that increasing the stirring energy to infinity would result in the formation of some kind of molecular soup with extremely small drops of both phases in which case the continuous phase is the one whose drops coalesce more quickly. [20] In our previous study, we investigated the effect of the emulsifier concentration on the inversion behaviour of the epoxy resin and formation of spherical particles.…”

Section: Introductionmentioning

confidence: 99%

Particle Formation by Emulsion Inversion Method: Effect of the Stirring Speed on Inversion and Formation of Spherical Particles

Aravand

Semsarzadeh

2008

Macromolecular Symposia

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Summery: Phase inversion emulsification technique was employed in this work as a practical method to form epoxy particles. The effect of stirring speed on the inversion behaviour and the morphological aspects of the resulting solid epoxy particles are investigated. Emulsion inversion was induced by increasing the amount of initially dispersed deionized water in the presence of a non-ionic block copolymer surfactant at a fixed concentration. The process of inversion was followed by monitoring the variations in the rotational speed of the stirrer caused by the viscosity variations of the emulsifying system throughout the process. It was shown that the mixing speed plays an important role in controlling the size and size distribution of the resulting emulsion particles. Below a critical stirring speed, spherical particles could not be formed and the inversion process resulted in macroscopically non-homogeneous multi shape structures. Fully spherical particles were formed above this critical speed. Further increase in the rotational speed of the mixer, significantly reduced the size of these spherical particles with a wide and random size distributions controlled and considerably narrowed by the stirring speed. Dynamic light scattering analysis and scanning electron microscopy were used to study the particle size and size distributions. In addition, study of the rotational speed variations of the stirrer, which is directly related to the viscosity changes of the emulsifying system, revealed that a correlation between the physical aspects of the inversion behaviour and the viscosity changes during the emulsion inversion process could be established.

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Mixing of viscous immiscible liquids. Part 1: Computational models for strong–weak and continuous flow systems

Cited by 37 publications

References 50 publications

Handling of artificial membranes using electrowetting-actuated droplets on a microfluidic device combined with integrated pA-measurements

Handling of artificial membranes using electrowetting-actuated droplets on a microfluidic device combined with integrated pA-measurements

Coalescence of immiscible polymer blends in chaotic mixers

Particle Formation by Emulsion Inversion Method: Effect of the Stirring Speed on Inversion and Formation of Spherical Particles

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