Experimental measurement of forces and energies associated with capillary rise in a vertical tube
Experimental measurement of forces and energies associated with capillary rise in a vertical tube
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DOI：
10.1016/j.jcis.2013.06.017
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发表时间：
2013-10-01
影响因子：
9.9
通讯作者：
Moon, Sung In
中科院分区：
文献类型：
--
作者：
Extrand, C. W.;Moon, Sung In
我们研究了液体在毛细管中上升时所产生的力和能量。使直径范围为0.5至1.4 mm的玻璃和聚四氟乙烯（PTFE）管与乙二醇、甘油或硅油接触以引发上升。我们用张力计测量了上升的液体所产生的力，并将它们与上升高度作了对比。从这些图中，我们估计了势能的变化。对于给定的液体-固体组合，势能的变化等于液体中润湿功和粘性耗散功之间的差值;势能值与管径无关，范围从7 mJ/m（2）（硅油通过PTFE上升）到33 mJ/m（2）（甘油和玻璃）。(C)2013 Elsevier Inc. All rights reserved.
We examined the forces and energies associated with liquid rising in a capillary tube. Glass and polytetrafluorethylene (PTFE) tubes with diameter ranging from 0.5 to 1.4 mm were brought into contact with ethylene glycol, glycerol or silicone oil to initiate rise. We measured the force generated by the rising liquids with a tensiometer and plotted them against rise height. From these plots, we estimated the change in potential energy. For a given liquid-solid combination, the change in potential energy was equal to the difference between the work of wetting and viscous dissipation in the bulk of the liquid; potential energy values were independent of tube diameter and ranged from 7 mJ/m(2) for silicone oil rising through PTFE to 33 mJ/m(2) for glycerol and glass. (C) 2013 Elsevier Inc. All rights reserved.