| Title |
Electrohydrodynamic Pumping Characteristics of the Needle-Centered Nozzle Electrode |
| Authors |
정회원(Jung, Hoi-Won) ; 문재덕(Moon, Jae-Duk) |
| Keywords |
침심노즐 ; 전기유체역학적(EHD) 펌핑 ; 코로나 방전 ; 액적 형성 ; 분사 ; 펌핑 효율 ; |
| Abstract |
A cooling system for microelectronics is becoming more important as its surface heat density is projected to reach that of the sun surface. The existing technologies using natural and forced convection are limited to solve the problems. Recently, an electrohydrodynamic driven flow is studied as one of the means to cope with this problems. A new method, utilizing a needle-centered nozzle electrode, has been proposed and investigated. The I-V characteristics of the nozzle electrode for deionized water and silicone oil were significantly different from that of without liquid, which might be due to the liquid drop covered on the nozzle tip by the EHD force acting near the needle tip. Results showed that the liquid pumping rate and flow efficiency of the nozzle electrode were very high, especially for the silicone oil. Theoretical analysis also showed the effectiveness of the needle electrode centered in the ceramic nozzle, which, however, can be a means as a liquid pump. |