Experimental investigation and visualization on capillary and boiling limits of micro-grooves made by different processes
- 作者：Shao-Wen Chen ; Jui-Ching Hsieh ; Cheng-Tai Chou ; Hung-Hui Lin ; Sheng-Chih Shen ; Ming-Jye Tsai
- 关键词：Micro-grooves ; Boiling limit ; Capillary limit ; Heat pipes ; Vapor chambers
- 刊名：Sensors and Actuators A ; Physical
- 出版年：2007
- 期刊代码：160_09244247
- 类别：et
- 出版时间：12 September 2007
- 卷：139
- 期：1-2
- 页码：78-87
- 文件大小：1519 K
摘要
Micro-grooves with various feature sizes ranged form 200 to 500 μm were fabricated as micro-wick structures by two different processes, including chemical etching and precision milling, for the experimental investigation and visualization on capillary and boiling limits. Pure water was employed as the working fluid, and the surfaces of the micro-wick structures were cleaned to ensure the hydrophile and the same surface conditions of these samples before testing. Various heat fluxes were then applied to these micro-wick structures to measure their thermal performances and capillary and boiling limits by both temperature measurement and experimental visualization. In addition, the experimental results were compared with the simplified analytical models. This study proposes a simple method to determine working limits and thermal performance of micro-structures for designing wick and selecting process.