Electrohydrodynamic Phenomena

Bandopadhyay, Aditya; Ghosh, Uddipta

doi:10.1007/s41745-018-0075-3

Cited by 13 publications

(7 citation statements)

References 153 publications

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“…The second observation pertained to the unprecedented high volumetric flow rates that could be sustained without entirely suppressing the fluid agitation. These observations can be attributed to two types of different electrokinetic mechanisms, namely ACEO and electrohydrodynamic, that are at play for the frequency ranges examined in this study.…”

Section: Resultsmentioning

confidence: 77%

Electrohydrodynamic-Driven Micromixing for the Synthesis of Highly Monodisperse Nanoscale Liposomes

Modarres

Tabrizian

2020

ACS Appl. Nano Mater.

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Microfluidic-based chemical synthesis is uniquely suited for the fabrication of reproducible and monodisperse nanoparticle batches due to the highly controlled reaction environments in microscale dimensions. With many passive and active micromixers emerging for the on-chip chemical synthesis needs, electrically driven fluid actuation is yet an unexplored technique with much-unrealized potentials. Accordingly, in this study, we propose a micromixer based on electrohydrodynamic-driven fluid instabilities for the synthesis of liposomes using the nanoprecipitation principle. The mixing channel embeds microelectrodes to impose a transverse electric field upon coflowing reagent-containing solvent and antisolvent streams. The sharp discontinuity in electrical parameters of solvent and antisolvent solutions at their interfaces is the source of fluid motion when low AC voltages are applied to the electrodes. The fluid instabilities at the interfaces lead to efficient mixing and nanoprecipitation of nanoparticles producing highly monodisperse liposomes for the unprecedented flow rates up to 400 μL/min and small voltages up to 10 V pp compared to its counterpart active micromixers. The liposome characteristics were studied by systematically evaluating the flow parameters, initial lipid concentrations, and surface charge. The obtained results and the working mechanism of the proposed micromixer can readily be extended to the production of nanoparticles of different chemistries relying on mixing of biphasic liquids.

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Section: Resultsmentioning

confidence: 77%

Electrohydrodynamic-Driven Micromixing for the Synthesis of Highly Monodisperse Nanoscale Liposomes

Modarres

Tabrizian

2020

ACS Appl. Nano Mater.

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“…Electrohydrodynamics is the study of the rapid flow or atomization behavior of fluids in an electric field. 36,37 This discipline is not only an important sub-discipline of electromagnetism and fluid dynamics, but also an important cost-effective technology in engineering. The target liquid flows out through a small nozzle connected with the electrode and is exposed to a high-voltage electric field, which will be induction charged or contact charged at the nozzle end, and gradually elongated into a thin jet or atomized into tiny droplets under the combined action of electric field force, gravity and surface tension.…”

Section: Reviewmentioning

confidence: 99%

Microgels for bioprinting: recent advancements and challenges

Xie,

Wang,

et al. 2024

Biomater. Sci.

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“…In their research L. Espín, A. Corbett and S. Kumar [30] examined Maxwell fluid film under electrical field in and provide expressions for the stress tensor including electrical terms. A. Bandopadhyay and U. Ghosh reviewed these electrodynamic effects in thin films [31]. Li, F. Tian, X. Tang and colleagues researched the stability of film casting and obtained equations for film equilibrium in their paper [32].…”

Section: Introductionmentioning

confidence: 99%

Rupture of Thin Film Covering the Liquid Metal Stirred by Alternating Magnetic Field. Numerical Simulation

Nikulin,

Demin,

Nukulina

2023

Preprint

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The present work deals with the technological process of induction melting of heat-resistant nickel alloys and, in particular, with the problem of formation and stability of oxide film on the surface of the melt. Our mathematical model describes the heat and mass transfer in the metal melt subjected to the influence of an alternating magnetic field, and the elastic stress states of the film on its surface. The governing equations of the problem are given and non-dimensional parameters are discussed. It is shown how the influence of the magnetic field strength on the flow of the metal melt changes at different frequencies. The states of the surface film are studied theoretically using numerical simulation. It is shown that the variation of the field strength at different frequencies leads to decaying oscillations in the velocity field. The causes of these oscillations are discussed in detail. The stress and destruction of thin films by melt motion are considered. The mechanisms responsible for the primary destruction of the initial film and its fragments are revealed. The rupture of quasi-stable films at different frequencies is studied. It is shown that the result of the influence on the film state with the increase of the magnetic field strength depends on the field frequency. The frequency range was found in which the surface film is strong enough to prevent the intensification of the melt flow with the increase of the magnetic field strength, this effect provides the stability of the film.

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Electrohydrodynamic Phenomena

Cited by 13 publications

References 153 publications

Electrohydrodynamic-Driven Micromixing for the Synthesis of Highly Monodisperse Nanoscale Liposomes

Electrohydrodynamic-Driven Micromixing for the Synthesis of Highly Monodisperse Nanoscale Liposomes

Microgels for bioprinting: recent advancements and challenges

Rupture of Thin Film Covering the Liquid Metal Stirred by Alternating Magnetic Field. Numerical Simulation

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