Experimental Study of Linear and Radial Two-Phase Heat Transport Devices Driven by Electrohydrodynamic Conduction Pumping

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Matthew R. Pearson ◽  
Jamal Seyed-Yagoobi
Keyword(s):  
Heat Source ◽  
Capillary Pressure ◽  
Heat Transport ◽  
Radial Direction ◽  
Heat Pipes ◽  
Working Fluid ◽  
Phase Flow ◽  
Transport Capacity ◽  
Two Phase ◽  
Capillary Phenomenon

Heat pipes are well known as simple and effective heat transport devices, utilizing two-phase flow and the capillary phenomenon to remove heat. However, the generation of capillary pressure requires a wicking structure and the overall heat transport capacity of the heat pipe is generally limited by the amount of capillary pressure generation that the wicking structure can achieve. Therefore, to increase the heat transport capacity, the capillary phenomenon must be either augmented or replaced by some other pumping technique. Electrohydrodynamic (EHD) conduction pumping can be readily used to pump a thin film of a dielectric liquid along a surface, using electrodes that are embedded into the surface. In this study, two two-phase heat transport devices are created. The first device transports the heat in a linear direction. The second device transports the heat in a radial direction from a central heat source. The radial pumping configuration provides several advantages. Most notably, the heat source is wetted with fresh liquid from all directions, thereby reducing the amount of distance that must be travelled by the working fluid. The power required to operate the EHD conduction pumps is a trivial amount relative to the heat that is transported.

scholarly journals Trial on the Application of Capillary Phenomenon of Solid CaO to Desulfurization of Liquid Fe

2010 ◽  
Vol 50 (8) ◽  
pp. 1071-1077 ◽  
Author(s):  
Toshihiro Tanaka ◽  
Yumi Ogiso ◽  
Mitsuru Ueda ◽  
Joonho Lee
Keyword(s):  
Capillary Phenomenon

Development of self-oil circulating sliding surface by utilizing capillary phenomenon

2017 ◽  
Vol 2017.23 (0) ◽  
pp. 1903
Author(s):  
Hiroaki MAEDA ◽  
Kazuyuki ITAGAKI ◽  
Kan SUGIYAMA ◽  
Yuki HIRATA ◽  
Shinya SASAKI
Keyword(s):  
Sliding Surface ◽  
Capillary Phenomenon

A new physical model on the capillary phenomenon of granular particles

2018 ◽  
Vol 40 (1) ◽  
pp. 127-138
Author(s):  
Nan Zhang ◽  
Bin Cheng ◽  
Hexi Baoyin
Keyword(s):  
Physical Model ◽  
Granular Particles ◽  
Capillary Phenomenon

scholarly journals BECHHOLD'S "CAPILLARY PHENOMENON" IN AGRICULTURE

Science ◽  
1921 ◽  
Vol 54 (1386) ◽  
pp. 74-74 ◽  
Author(s):  
J. Alexander
Keyword(s):  
Capillary Phenomenon

Capillary phenomenon during melt removal under gas-assisted laser cutting

1999 ◽  
Author(s):  
Vladimir I. Ledenev ◽  
Vladimir A. Karasev ◽  
Vladimir P. Yakunin
Keyword(s):  
Laser Cutting ◽  
Capillary Phenomenon

Capillary Condensation Adhesion Phenomena and Analysis of the Micromechanical Gyroscope

2013 ◽  
Vol 562-565 ◽  
pp. 251-254
Author(s):  
Yun Li He ◽  
Hai Peng Liu ◽  
Shi Qiao Gao ◽  
Cai Feng Wang
Keyword(s):  
Liquid Bridge ◽  
Capillary Condensation ◽  
Micro Structure ◽  
Macroscopic System ◽  
Kelvin Equation ◽  
Capillary Adhesion ◽  
Micromechanical Gyroscope ◽  
Capillary Phenomenon

In MEMS, the size of micro-structure is usually in the micron and even nanoscale. It's easier to form capillary phenomenon than the macroscopic system. In view of this phenomenon, this article is based on the micro-mechanical gyroscope as the research object, to analyze the occurrence of capillary condensation of adhesion phenomenon. Firstly, we derive the Kelvin equation for capillary condensation, and then combination of the Kelvin equation introduce the capillary condensation of the adhesion phenomenon; Secondly, it analyzes the dynamics characteristics of its structure existing the liquid bridge, and analyzes the causes of the liquid bridge; Finally, it analyzes the capillary adhesion phenomena on the performance of the micro-mechanical gyroscope,as well as how to avoid the generation of capillary condensation adhesion.

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