Title :
Electrohydrodynamic induction pumping of a stratified liquid/vapor medium in the presence of volumetric and interface electric charges
Author :
Wawzyniak, Markus ; Seyed-Yagoobi, Jamal
Author_Institution :
Dept. of Mech. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
Electrohydrodynamic (EHD) pumping of two-phase media has potential applications related to both pure pumping as well as heat transfer enhancement. Utilization as pumping mechanism is attractive for terrestrial and outer space systems. Augmentation of mass flow rate in two-phase heat transfer applications, such as boiling and condensation, leads to enhanced heat transfer coefficients, thus making EHD pumping an attractive candidate for these situations. A theoretical model is presented for EHD induction pumping of a stratified liquid/vapor medium accounting for electric shear stresses due to interfacial and bulk charges. Bulk charges are a result of temperature gradient in the liquid phase of the fluid. Conditions are established under which the bulk effect plays a significant role in the pumping process
Keywords :
boiling; condensation; electric charge; electrohydrodynamics; electrostatics; heat transfer; mass transfer; pumps; stratified flow; temperature distribution; two-phase flow; boiling; bulk charges; condensation; electric shear stresses; electrohydrodynamic induction pumping; heat transfer enhancement; interface electric charges; mass flow rate; pumping mechanism; stratified liquid/vapor medium; temperature gradient; two-phase heat transfer; two-phase media; volumetric electric charges; Electric potential; Electrohydrodynamics; Heat pumps; Heat transfer; Industry Applications Society; Mechanical engineering; Permittivity; Stress; Temperature; Thermal conductivity;
Journal_Title :
Industry Applications, IEEE Transactions on
