Title :
Electrohydrodynamic induction pumping of a stratified liquid/vapor medium in the presence of volumetric and interface electric charges
Author :
Wawzyniak, M. ; Seyed-Yagoobi, J.
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 a pumping mechanism is attractive for terrestrial and outer space systems. Augmentation of mass flux 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 :
condensation; electric charge; electric fields; electrohydrodynamics; heat transfer; pumps; two-phase flow; EHD; boiling; bulk charges; condensation; electric shear stresses; electrohydrodynamic induction pumping; electrostatic pumping; enhanced heat transfer coefficients; heat transfer enhancement; interface electric charges; interfacial charges; mass flux augmentation; outer space systems; pumping mechanism; stratified liquid/vapor medium; temperature gradient; terrestrial systems; two-phase heat transfer; two-phase media; volumetric electric charges; Electric potential; Electrohydrodynamics; Heat pumps; Heat transfer; Resistance heating; Space heating; Stress; Temperature; Thermal conductivity; Thermal force;
Conference_Titel :
Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5589-X
DOI :
10.1109/IAS.1999.805984
