Droplet movement on a vertical gradient surface

Tzong-Shyng Leu, Tseng Hsin Wu

研究成果: Conference contribution

2 引文 斯高帕斯(Scopus)

摘要

This research studies the improvement of droplet movement on a vertical surface. Silicon substrates fabricated with different surface tension gradients are used to enhance heat transfer efficiency in a vapor condensing system. Experimental results find that the heat transfer efficiency of gradient surface with strip width C=1mm can be 10% higher than a hydrophilic surface. The mechanism for the gradient surface is also studied by both theoretical and experimental methods. A characteristic length scale Lc, defined as Lc = √γ/ρg where γ, ρ and g represent the liquid surface tension coefficient, liquid density and gravity, is found in the system. When the gradient surface length scale C is much higher than the length scale Lc the system can be considered as an only gravity driven system. When length scale C of the gradient surface is smaller than or equals to the length scale Lc, the surface tension gradient driven force becomes dominant force in the system. It is found that C=1mm gradient surface can cause smaller droplets to move and it is believed this is the major mechanism responsible for the better heat transfer efficiency.

原文English
主出版物標題3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2008
頁面641-646
頁數6
DOIs
出版狀態Published - 2008 九月 1
事件3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2008 - Sanya, China
持續時間: 2008 一月 62008 一月 9

出版系列

名字3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS

Other

Other3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2008
國家China
城市Sanya
期間08-01-0608-01-09

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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  • 引用此

    Leu, T-S., & Wu, T. H. (2008). Droplet movement on a vertical gradient surface. 於 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2008 (頁 641-646). [4484413] (3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS). https://doi.org/10.1109/NEMS.2008.4484413