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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 217-229

Electric Field Effect in Boiling Heat Transfer. Part A: Simulation of the Electric Field and Electric Forces

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

A mathematical model predicting the electric field distribution in a poor electrically conductive boiling fluid and the electric forces on bubbles is described in this paper. This novel model can account for the presence of multiple bubbles, the thermal boundary layer and the generated free charges. The finite element method was successfully used to solve this model. The effect of multiple bubbles and the generated free charges was clarified. The electric field distribution, the electric body force and accordingly the resultant force acting on the bubbles were calculated for a shell and tube evaporator.