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Journal of Enhanced Heat Transfer
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ISSN Druckformat: 1065-5131
ISSN Online: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v5.i4.20
pages 231-247

Electric Field Effect in Boiling Heat Transfer. Part B: Electrode Geometry

Tassos G. Karayiannis
Department of Mechanical and Aerospace Engineering Brunel University London, Uxbridge, UP8 3PH, UK
Y. Xu
National Refrigeration and Air Conditioning Products, Inc. Brantford, Ont., N3T 5Y6, Canada

ABSTRAKT

The effect of different electrode geometries on boiling heat transfer is presented in this paper. The resultant of the buoyancy, surface tension and electric forces on bubbles adjacent to the heating tubes in a tube bundle was numerically simulated. A novel electrode geometry was suggested as it produces a force tangential to the tube surface on most of the bubbles on the boiling tube. The numerical findings were verified using a shell-and-tube electrohydrodynamic (EHD) heat exchanger (with five smooth tubes) boiling HCFC-123.


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