Numerical simulation of electro-conjugate fluid flow considering electric double layer

An electro-conjugate fluid (ECF) is a dielectric liquid generating powerful flow when high DC voltage is applied with electrodes inserted. The ECF flow is generally known as a kind of electrohydrodynamics phenomenon. Although the ECF flow is applicable for attractive applications, its prediction by...

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Autores principales:	Yoshiki IIJIMA, Kyohei HOSODA, Kenjiro TAKEMURA, Koji FUKAGATA, Kazuya EDAMURA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2015
Materias:	functional fluid electro-conjugate fluid electrohydrodynamics numerical simulation electric double layer Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/7e3c9be8b2e24d508e6023c23e95681f
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spelling	oai:doaj.org-article:7e3c9be8b2e24d508e6023c23e95681f2021-11-26T06:32:14ZNumerical simulation of electro-conjugate fluid flow considering electric double layer2187-974510.1299/mej.15-00341https://doaj.org/article/7e3c9be8b2e24d508e6023c23e95681f2015-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/2/6/2_15-00341/_pdf/-char/enhttps://doaj.org/toc/2187-9745An electro-conjugate fluid (ECF) is a dielectric liquid generating powerful flow when high DC voltage is applied with electrodes inserted. The ECF flow is generally known as a kind of electrohydrodynamics phenomenon. Although the ECF flow is applicable for attractive applications, its prediction by numerical simulation, which could be a powerful tool for optimum design, has been far from satisfactory. One of the plausible reasons for this failure is insufficient consideration of the electric double layer (EDL), in which positive and negative charges are stratified on the electrode surface. This study first confirms the presence of EDL by measuring the potential distribution between the symmetrical pole electrodes (φ0.3-mm stainless steel wires) inserted in the ECF. Subsequently, the ECF flow simulation is performed by taking into account the EDL. The governing equations of ECF flow consist of a modified Poisson-Boltzmann equation, the charge conservation with charge recombination, the Korteweg-Helmholtz equation, the continuity equation and the incompressible Navier-Stokes equation. These governing equations give the distribution of potential, electric field, charge density and flow velocity as a result of numerical computations. We demonstrate that by properly considering the EDL the numerical simulation can reasonably well reproduce the ECF flow in terms of the velocity distribution and the induced flow rate.Yoshiki IIJIMAKyohei HOSODAKenjiro TAKEMURAKoji FUKAGATAKazuya EDAMURAThe Japan Society of Mechanical Engineersarticlefunctional fluidelectro-conjugate fluidelectrohydrodynamicsnumerical simulationelectric double layerMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 2, Iss 6, Pp 15-00341-15-00341 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	functional fluid electro-conjugate fluid electrohydrodynamics numerical simulation electric double layer Mechanical engineering and machinery TJ1-1570
spellingShingle	functional fluid electro-conjugate fluid electrohydrodynamics numerical simulation electric double layer Mechanical engineering and machinery TJ1-1570 Yoshiki IIJIMA Kyohei HOSODA Kenjiro TAKEMURA Koji FUKAGATA Kazuya EDAMURA Numerical simulation of electro-conjugate fluid flow considering electric double layer
description	An electro-conjugate fluid (ECF) is a dielectric liquid generating powerful flow when high DC voltage is applied with electrodes inserted. The ECF flow is generally known as a kind of electrohydrodynamics phenomenon. Although the ECF flow is applicable for attractive applications, its prediction by numerical simulation, which could be a powerful tool for optimum design, has been far from satisfactory. One of the plausible reasons for this failure is insufficient consideration of the electric double layer (EDL), in which positive and negative charges are stratified on the electrode surface. This study first confirms the presence of EDL by measuring the potential distribution between the symmetrical pole electrodes (φ0.3-mm stainless steel wires) inserted in the ECF. Subsequently, the ECF flow simulation is performed by taking into account the EDL. The governing equations of ECF flow consist of a modified Poisson-Boltzmann equation, the charge conservation with charge recombination, the Korteweg-Helmholtz equation, the continuity equation and the incompressible Navier-Stokes equation. These governing equations give the distribution of potential, electric field, charge density and flow velocity as a result of numerical computations. We demonstrate that by properly considering the EDL the numerical simulation can reasonably well reproduce the ECF flow in terms of the velocity distribution and the induced flow rate.
format	article
author	Yoshiki IIJIMA Kyohei HOSODA Kenjiro TAKEMURA Koji FUKAGATA Kazuya EDAMURA
author_facet	Yoshiki IIJIMA Kyohei HOSODA Kenjiro TAKEMURA Koji FUKAGATA Kazuya EDAMURA
author_sort	Yoshiki IIJIMA
title	Numerical simulation of electro-conjugate fluid flow considering electric double layer
title_short	Numerical simulation of electro-conjugate fluid flow considering electric double layer
title_full	Numerical simulation of electro-conjugate fluid flow considering electric double layer
title_fullStr	Numerical simulation of electro-conjugate fluid flow considering electric double layer
title_full_unstemmed	Numerical simulation of electro-conjugate fluid flow considering electric double layer
title_sort	numerical simulation of electro-conjugate fluid flow considering electric double layer
publisher	The Japan Society of Mechanical Engineers
publishDate	2015
url	https://doaj.org/article/7e3c9be8b2e24d508e6023c23e95681f
work_keys_str_mv	AT yoshikiiijima numericalsimulationofelectroconjugatefluidflowconsideringelectricdoublelayer AT kyoheihosoda numericalsimulationofelectroconjugatefluidflowconsideringelectricdoublelayer AT kenjirotakemura numericalsimulationofelectroconjugatefluidflowconsideringelectricdoublelayer AT kojifukagata numericalsimulationofelectroconjugatefluidflowconsideringelectricdoublelayer AT kazuyaedamura numericalsimulationofelectroconjugatefluidflowconsideringelectricdoublelayer
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Numerical simulation of electro-conjugate fluid flow considering electric double layer

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