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    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/49940


    題名: Equilibrium Phase Diagram of Drop-on-Fiber: Coexistent States and Gravity Effect
    作者: Chou,TH;Hong,SJ;Liang,YE;Tsao,HK;Sheng,YJ
    貢獻者: 化學工程與材料工程學系
    關鍵詞: LIQUID-DROPS;THIN CYLINDERS
    日期: 2011
    上傳時間: 2012-03-27 16:27:03 (UTC+8)
    出版者: 國立中央大學
    摘要: Drop-on-fiber is commonly observed in daily life and is closely related to digital microfluidics. The wetting behavior of droplet-on-fiber is different from that of droplet-on-plane due to the global cylindrical shape. It is generally believed that the equilibrium geometric shape of a droplet on a fiber takes either asymmetric clam-shell or axisymmetric barrel conformation in the absence of gravity. The barrel-to-clam-shell transition is determined by the stability condition. Nonetheless, experimental observations showed that both barrel and clam-shell conformations can coexist in some situations and thus indicated the existence of the multiple stable states. In this Article, the phase diagrams of droplet-on-fiber, that is, the plots of droplet volume against contact angle, are established on the basis of the finite-element simulation (Surface Evolver). When the gravity effect is absent, there are three regimes including barrel, clam-shell, and coexistence of barrel and clam-shell. As the gravity effect is considered, there exist three regimes, including (I) downward clam-shell, (II) coexistence of barrel and dam-shell, and (III) falling-off.
    關聯: LANGMUIR
    顯示於類別:[化學工程與材料工程學系 ] 期刊論文

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