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Коробейников, С. М.; Мелехов, А. В.; Posukh, V. G.; Antonov, V. A.; Royak, M.E.

doi:10.1023/a:1017530728092

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…They are usually elongated along the electric field lines, compressed or disintegrated. The electric field can be enhanced or depleted inside such bubbles of ten or more [25,[53][54][55]. The electric field enhancement inside the deformed bubble reduces the applied external field required for the breakdown.…”

Section: Numerical Simulation Of Discharges In Bubbles Immersed In Li...mentioning

confidence: 99%

“…For example, recent experiments [24] conducted in transformer oil with bubbles have shown that bubbling the transformer oil (ε=2 ) with air or sulfur hexafluoride leads to the decrease of the breakdown voltage by 34% and 19%, respectively. The breakdown initiation in water (ε=80) using artificially produced bubbles 40-100 μm in size was investigated in [25,26]. In all cases, the discharge was initiated inside the bubbles.…”

Section: Introductionmentioning

confidence: 99%

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Pre-breakdown phenomena and discharges in a gas-liquid system

Терешонок¹,

Babaeva²,

Naidis³

et al. 2018

Plasma Sources Sci. Technol.

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In this paper, we investigate pre-breakdown and breakdown phenomena in gas-liquid systems. Cavitation void formation and breakdown in bubbles immersed in liquids are studied numerically, while complete breakdown of bubbled water is studied in experiments. It is shown that taking into account the dependence of water dielectric constant on electric field strength plays the same important role for cavitation void appearance under the action of electrostriction forces as the voltage rise time. It is also shown that the initial stage of breakdown in deformed bubbles immersed in liquid strongly depends on spatial orientation of the bubbles relative to the external electric field. The effect of immersed microbubbles, distributed in bulk water, on breakdown time and voltage is studied experimentally. At the breakdown voltage, the slow 'thermal' mechanism is changed by the fast 'streamer-leader' showing a decrease in breakdown time by two orders of magnitude by introducing microbubbles (0.1% of volumetric gas content) into the water. In addition, the plasma channel is found to pass between nearby microbubbles, exhibiting some 'guidance' effect.

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Section: Numerical Simulation Of Discharges In Bubbles Immersed In Li...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pre-breakdown phenomena and discharges in a gas-liquid system

Терешонок¹,

Babaeva²,

Naidis³

et al. 2018

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The use of DC and AC external electric fields has been investigated for many years in nanotechnology. External electric-field-directed nanoparticle synthesis processes, − motion and precipitation of suspensions and bubbles in water, − suspension filtration characteristics, spray-coating characteristics, , drying rates of wet-coated layers, , nanoparticle deposition processes, − and sintering of ceramic nanoparticles , have been previously studied. These findings provide comprehensive tools for tailoring specific processing routes of functional and structural nanoceramic materials in applications ranging from lightweight and high-temperature-resistant engineering ceramics, bioceramics, electroceramics, and optoceramics to ceramic microstructures for electronics and sensor applications.…”

Section: Introductionmentioning

confidence: 99%

Directed Self-Assembly of Colloidal Model Systems on Charge-Selective Surfaces in External Electric Fields: Theory and Numerical Analysis

Falk

2012

J. Phys. Chem. B

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Membrane electrophoretic deposition has a long-established reputation in delivering high quality nanoparticle compact and coating solutions in the field of high performance nanoparticle architectures made from aqueous nanoparticle suspensions. Although for a long time, it has been common practice in nanoparticle science and particle-based nanotechnology to use membrane electrophoretic shaping of nanoparticles, little is known about long-range electrohydrodynamic manipulation of the engineered assembly of colloidal particles at the nanoscale. Here, we analyze the interfacial field-induced flow of a strong electrolyte and its implications for the directed self-assembly of colloidal nanoparticles on nonuniform charge-selective ion-exchange membrane surfaces as well as on conducting microelectrodes imposed to electrophoretic deposition boundary conditions. Numerical calculations of the vortex streamlines are derived for the case of extreme diffusion limitation, concentration polarization near the limiting current, and induced electric forces acting upon the residual space charge. The system is modeled by coupled mass balances, Ohmic law, Navier-Stokes, and Nernst-Planck equations. Particularly, numerical calculations under bulk electroconvection conditions show that the latter provides an efficient intrinsic interfacial mechanism capable of accounting for the experimentally observed local electrophoretic deposition behavior of nanoparticles at ideal permselective membranes with nonplanar periodic charge discontinuity and metal microelectrodes.

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