Can a Siphon Work In Vacuo?
Can a Siphon Work In Vacuo?
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DOI：
10.1021/ed2001818
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发表时间：
2011-11-01
影响因子：
3
通讯作者：
Licence, Peter
中科院分区：
文献类型：
--
作者：
Boatwright, Adrian L.;Puttick, Simon;Licence, Peter
从古埃及时代起，虹吸管就被用作将液体从一个容器转移到另一个容器的方法，是一种可靠的工具。虽然，从发酵桶中虹吸啤酒或从酒窖中虹吸葡萄酒的行为是一种代代相传的技能，但我们真的知道虹吸管是如何工作的吗？人们普遍认为，虹吸管主要是由大气压力驱动的。描述了一个实验，该实验表明虹吸管甚至可以在高真空条件下工作。分子凝聚力和重力被证明是在操作中的虹吸管的贡献因素;一个积极的大气压的存在是不需要的。
Used since the time of the ancient Egyptians as a method for transferring liquids from one vessel to another, the siphon is a dependable tool. Although, the act of siphoning beer from a fermentation barrel or wine from a demijohn is a skill that has been passed down from generation to generation, do we really know how the siphon works? It is widely believed that the siphon is principally driven by the force of atmospheric pressure. An experiment is described that shows that a siphon can function even under high-vacuum conditions. Molecular cohesion and gravity are shown to be contributing factors in the operation of a siphon; the presence of a positive atmospheric pressure is not required.