Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/238226
Type: Artigo
Title: Floating liquid bridge charge dynamics
Author: Teschke, Omar
Soares, David Mendez
Gomes, Whyllerson Evaristo
Valente Filho, Juracyr Ferraz
Abstract: The interaction of liquid with electric fields is investigated in a configuration where up to 13 kV are applied between electrodes resulting in a 106 V/m electric field in the capillaries and where there is the formation of a free-standing fluid bridge in the interelectrode gap. The Mott-Gurney equation was fitted to the measured ionization current vs applied voltage curve which indicates that the ionization rate at the high-voltage anode electrode dimethylsulfoxide (DMSO) interface and space charging in the interelectrode gap determine the floating liquid bridge current for a given cathode-to-anode voltage. Space charge effects were measured in the cathode becker and also at the liquid bridge since the ionized charges at the anode migrate to the bridge outer surface and decrease the interfacial tension from 43 mJ/m2 to 29 mJ/m2. Two distinct structural regions then form the bridge, a charged plastic (bulk modulus ~100 MPa) conducting outer layer with a surface conductivity of ~10-9 Ω-1, which shapes and supports the floating fluid structure, and an inner liquid cylinder, where DMSO molecules flow. © 2016 AIP Publishing LLC.
The interaction of liquid with electric fields is investigated in a configuration where up to 13 kV are applied between electrodes resulting in a 106 V/m electric field in the capillaries and where there is the formation of a free-standing fluid bridge in the interelectrode gap. The Mott-Gurney equation was fitted to the measured ionization current vs applied voltage curve which indicates that the ionization rate at the high-voltage anode electrode dimethylsulfoxide (DMSO) interface and space charging in the interelectrode gap determine the floating liquid bridge current for a given cathode-to-anode voltage. Space charge effects were measured in the cathode becker and also at the liquid bridge since the ionized charges at the anode migrate to the bridge outer surface and decrease the interfacial tension from 43 mJ/m2 to 29 mJ/m2. Two distinct structural regions then form the bridge, a charged plastic (bulk modulus ~100 MPa) conducting outer layer with a surface conductivity of ~10-9 Ω-1, which shapes and supports the floating fluid structure, and an inner liquid cylinder, where DMSO molecules flow.
Subject: Filmes líquidos, Ionização, Campos elétricos
Country: Estados Unidos
Editor: AIP Publishing
Citation: Physics Of Fluids. American Institute Of Physics Inc., v. 28, n. 1, p. , 2016.
Rights: fechado
Identifier DOI: 10.1063/1.4938402
Address: https://aip.scitation.org/doi/10.1063/1.4938402
Date Issue: 2016
Appears in Collections:IFGW - Artigos e Outros Documentos

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