Numerical Simulation of Droplet Dynamics in Membrane Emulsification Systems

Pathak, Manabendra

doi:10.5772/50180

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…This is consistent with the formation of satellite droplets during droplet detachment from the membrane and suggests a more complex process than is often described for the droplet formation/detachment [30,31]. Various computational fluid dynamics and lattice Boltzmann (LB) simulations have shown how droplets growing at a membrane pore become distorted in the direction of the cross-flow [28,32]. In this case, the slower growth of the interface should result in a lower dynamic interfacial tension with an associated smaller mean drop size, as is seen.…”

Section: (B) Emulsion Formationsupporting

confidence: 76%

Manufacture of poly(methyl methacrylate) microspheres using membrane emulsification

Bux

Manga

Hunter

et al. 2016

Phil. Trans. R. Soc. A.

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Accurate control of particle size at relatively narrow polydispersity remains a key challenge in the production of synthetic polymer particles at scale. A cross-flow membrane emulsification (XME) technique was used here in the preparation of poly(methyl methacrylate) microspheres at a 1-10 l h(-1) scale, to demonstrate its application for such a manufacturing challenge. XME technology has previously been shown to provide good control over emulsion droplet sizes with careful choice of the operating conditions. We demonstrate here that, for an appropriate formulation, equivalent control can be gained for a precursor emulsion in a batch suspension polymerization process. We report here the influence of key parameters on the emulsification process; we also demonstrate the close correlation in size between the precursor emulsion and the final polymer particles. Two types of polymer particle were produced in this work: a solid microsphere and an oil-filled matrix microcapsule.This article is part of the themed issue 'Soft interfacial materials: from fundamentals to formulation'.

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Section: (B) Emulsion Formationsupporting

confidence: 76%

Manufacture of poly(methyl methacrylate) microspheres using membrane emulsification

Bux

Manga

Hunter

et al. 2016

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

show abstract

“…In particular the cross-flow T-shape microchannel junction can be considered as a model of membrane emulsification [22,29,30]. However, contrary to the single pore system (or real membrane emulsification units) in microfluidic droplet formation, the Reynolds number for the continuous phase flow is usually below unity and the capillary numbers typically range from Ca ∼ 10 −3 to 10 1 for flow rates accessible using syringe pumps [27]. Therefore, low throughput of monodispersed emulsion droplets can be achieved.…”

Section: Introductionmentioning

confidence: 98%

“…ceramic, stainless steel and polymeric). Recently the advanced numerical methods based on the computational fluid dynamics (CFD) were applied [26,27].…”

Section: Introductionmentioning

confidence: 99%