Heat transfer enhancement leads to Performance Improvement of heat exchangers and a considerable decrease in their size.The electrohydrodynamics(EHD) augmentation of heat transfer refers to combination of electric field and fluid field in a dielectric fluid domain.In this work, enhancement of heat transfer in partially open finned enclosure has been investigated experimentally.Five faces of the enclosure were thermally and electrically insulted and one face was a finned copper plate.Effect of number of fins,1,3,and 7 was investigated. An aperture was located in a face opposite to the copper plate whose height is 7.5 cm .The dimensions of the enclosure are and it has high. The fins are made of commercial pure copper with thickness of and their lengths are one quarter of the enclosure widths. Apart from the copper plate, other walls of the enclosure are made of the Plexiglas.The wire electrodeswere installed near fins also at three positions at top,bottom and in front of fins. The applied current, applied voltage and different types of corona discharge have been investigated.The heat transfer is enhanced while the applied current and voltage increased. Moreover,higher location of the aperture can lead to more enhancement of heat transfer by EHD.The best location for electrode was in front of the fins.The positive corona is more effective on enhancing heat transfer when the number of electrodes is increased from one to seven. Keywords: Electrohydrodynamics, Heat transfer enhancement, Finned enclosures.
