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Electrothermal liquid motion in microsystems subjected to alternating and rotating electric fields

Electrothermal liquid motion in microsystems subjected to alternating and rotating electric fields
Electrothermal liquid motion in microsystems subjected to alternating and rotating electric fields
Electrothermal motion in an aqueous solution appears when an electric field is coupled with thermally-induced gradients of conductivity and permittivity in the fluid. The temperature field can be produced by external sources, such as strong illumination, or caused by the applied electric field through Joule heating. Electrothermal flow in microsystems is usually important at frequencies around 1 MHz and voltages around. 10 V. In this work, we consider first the two-dimensional problem of an aqueous solution placed on top of two co-planar electrodes that are subjected to an ac potenfial difference when there is either a vertical or horizontal temperature gradient. Secondly, we study the three-dimensional problem of an aqueous solution lying on four co-planar electrodes which produce a rotating field. This electric field when combined with a vertical temperature gradient rotates the liquid. The resulting electric field an liquid motion in these problems are characterised using self-similar solutions. Finally, these analytical solutions are compared with numerical and experimental results.
0-7918-3719-X
257-262
Gonzalez, Antonio
41d6e3cb-9a9a-499a-89b3-a2872864e9d3
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Castellanos, Antonio
aa989a75-63b0-4f3e-a36b-370545034d7b
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Green, Nicolas G
d9b47269-c426-41fd-a41d-5f4579faa581
Gonzalez, Antonio
41d6e3cb-9a9a-499a-89b3-a2872864e9d3
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Castellanos, Antonio
aa989a75-63b0-4f3e-a36b-370545034d7b
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Green, Nicolas G
d9b47269-c426-41fd-a41d-5f4579faa581

Gonzalez, Antonio, Ramos, Antonio, Castellanos, Antonio, Morgan, Hywel and Green, Nicolas G (2003) Electrothermal liquid motion in microsystems subjected to alternating and rotating electric fields. ASME 2003 International Mechanical Engineering Congress and Exposition. pp. 257-262 . (doi:10.1115/IMECE2003-43272).

Record type: Conference or Workshop Item (Paper)

Abstract

Electrothermal motion in an aqueous solution appears when an electric field is coupled with thermally-induced gradients of conductivity and permittivity in the fluid. The temperature field can be produced by external sources, such as strong illumination, or caused by the applied electric field through Joule heating. Electrothermal flow in microsystems is usually important at frequencies around 1 MHz and voltages around. 10 V. In this work, we consider first the two-dimensional problem of an aqueous solution placed on top of two co-planar electrodes that are subjected to an ac potenfial difference when there is either a vertical or horizontal temperature gradient. Secondly, we study the three-dimensional problem of an aqueous solution lying on four co-planar electrodes which produce a rotating field. This electric field when combined with a vertical temperature gradient rotates the liquid. The resulting electric field an liquid motion in these problems are characterised using self-similar solutions. Finally, these analytical solutions are compared with numerical and experimental results.

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More information

Published date: November 2003
Venue - Dates: ASME 2003 International Mechanical Engineering Congress and Exposition, 2003-11-01
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 264529
URI: https://eprints.soton.ac.uk/id/eprint/264529
ISBN: 0-7918-3719-X
PURE UUID: b069b2c8-c15e-4128-a270-faea9fc64991
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676
ORCID for Nicolas G Green: ORCID iD orcid.org/0000-0001-9230-4455

Catalogue record

Date deposited: 19 Sep 2007
Last modified: 20 Jul 2019 00:59

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Contributors

Author: Antonio Gonzalez
Author: Antonio Ramos
Author: Antonio Castellanos
Author: Hywel Morgan ORCID iD
Author: Nicolas G Green ORCID iD

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