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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

DIELECTROPHORETIC HEAT TRANSFER IN LIQUIDS

Get access (open in a dialog) DOI: 10.1615/IHTC6.2890
pages 177-183

Résumé

The possibility of adopting the principles involved in the electric field induced nucleation and prenucleation phenomena in liquids has been investigated with a view to induce forced convection to control the temperature and to develope efficient heat transfer methods. Dielectrophoretic forces have been found to induce forced convection in subheated and superheated liquids. The effectiveness of these forces has enhanced by (i) introducing non-uniformity in the applied electric field, and (ii) introducing known gradient in the dielectric permittivity of the liquid (Benzene) used. The increased heat flux Q/A due to forced convection could be controlled by controlling the strength and duration of the applied electric field (both + ve and − ve). The d.c. field was found to have, significant and equal in magnitude, effect on heat transfer both on switching on and off. The heater surface thermodynamics has been determined at known temperature gradient inside the liquid and the condition of the electric field at the heater surface. The rates of increased heat transfer have been correlated with applied electric field both on charging and discharging the heater surface under the known thermodynamic parameters of the liquid.