Enhancement of external condensation heat transfer by pumping of liquid condensate circumferentially with electric conduction phenomenon

Electrohydrodynamic (EHD) conduction pumping is associated with the heterocharge layers of finite thickness in the vicinity of the electrodes, generated by the process of dissociation of the neutral electrolytic species and recombination of the generated ions. This paper numerically investigates the effect of EHD conduction pumping of liquid condensate circumferentially on the heat transfer performance of a condensation tube. The local interface profile is determined by the balance of fluid velocity and inter-phase momentum exchange. The conduction mechanism is designated to pump the liquid film from the top portion of the tube where the gravity body force plays minimal role. The interface profile, liquid condensate flow structure, and heat transfer rate under operating of one electrode pair and two electrodes pairs are investigated. The heat transfer performance for various operating conditions is also studied in this paper.