The Anti-Gravity Phenomena in EHD Heat Pipe Model

Abstract

A heat pipe model of electrohydrodynamical (EHD) enhancement heat transfer has been designed and made. The insulating liquid was selected as working fluid and the copper wire whose diameter was 1mm was used as the high voltage electrode. The temperature in the inlet and outlet of both the vaporization section and the condensation section, the saturation vapor pressure inside this model were measured respectively under different applied dc voltage and different tilt angle, that is, the vaporization section was placed higher than the condensation section. The experiment results indicate that the circumfluence between the condensation section and the vaporization section was improved with the increase of the applied dc voltage. Such EHD enhancement heat transfer technology can be practically employed in the heat transfer engineering, and has some reference values for the investigation of heat pipes used in the case of anti-gravity.

Effects of Contact Charging on Spray Impingement Heat Transfer Performance and Spray Behavior

“…DiMarco and Grassi (2002) have demonstrated significant increases in the CHF in pool boiling of FC-72 via the use of the electric Kelvin force at electric potentials of 10 kV, both in Earth gravity and microgravity. Yang et al (2002) used EHD forces to enhance heat pipe performance, and Darabi (2004) describes the EHD enhancement of microscale thin film evaporation. Chow et al (1997) and Kim (2006) have summarized spray cooling research.…”