EHD Enhancement of Nucleate Boiling

摘要: This paper describes: (a) an experimental investigation into the effect of electric field applied to pool boiling Freon (R114) on a finned tube and (b) theoretical model electrically enhanced nucleate applicable simple surfaces only. Experimental results have shown electrohydrodynamic (EHD) enhancement heat transfer be manifest in two ways: (1) elimination hysteresis, (2) augmentation nulceate coefficients by up order magnitude. These effects were also observed Freon/oil mixtures. A new analytical is described whereby EHD data from previous studies (employing apparatus comprising heated wires with concentric cylinder electrodes) been correlated for first time using concept electrical influence number. dimensionless parameter based upon relationship between intensity changes bubble departure diameter at surface.