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Journal of Enhanced Heat Transfer

Impact factor: 0.400

ISSN Print: 1065-5131
ISSN Online: 1563-5074

Journal of Enhanced Heat Transfer


pages 231-247

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

Tassos G. Karayiannis
Bank Polytechnic, London SE1 OA A, UK, School of Engineering and Design, Brunel University, Uxbridge, West London, United Kingdom
Y. Xu
National Refrigeration and Air Conditioning Products, Inc. Brantford, Ont., N3T 5Y6, Canada

ABSTRACT

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.