Formation of thermal flow fields and chemical transport in air and water by atmospheric plasma
Formation of thermal flow fields and chemical transport in air and water by atmospheric plasma
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DOI：
10.1088/1367-2630/13/5/053025
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发表时间：
2011-05-16
影响因子：
3.3
通讯作者：
Sato, Takehiko
中科院分区：
文献类型：
--
作者：
Shimizu, Tetsuji;Iwafuchi, Yutaka;Sato, Takehiko
低温大气等离子体是医疗用途的潜在工具，例如消毒/灭菌。为了使其有效和发挥作用，了解化学反应物质在空气和液体中的传输机制至关重要。在铂引脚电极与水面之间产生大气等离子体放电。测量了低温大气等离子体的热流场及其化学成分。结果表明，放电引起了以15米每秒（-1）左右的速度向水面流动的气体。由于摩擦，这种气流从水面的排放点引起了水中的循环流动。空气中产生的化学成分溶于水，水的性质发生了变化。甲基红溶液显示的pH值变化与诱导的流动模式相似，因此认为活性物质主要通过对流运输在水中分布。
Cold atmospheric plasma is a potential tool for medical purposes, e. g. disinfection/sterilization. In order for it to be effective and functional, it is crucial to understand the transport mechanism of chemically reactive species in air as well as in liquid. An atmospheric plasma discharge was produced between a platinum pin electrode and the surface of water. The thermal flow field of a cold atmospheric plasma as well as its chemical components was measured. A gas flow with a velocity of around 15 m s(-1) to the water's surface was shown to be induced by the discharge. This air flow induced a circulating flow in the water from the discharge point at the water's surface because of friction. It was also demonstrated that the chemical components generated in air dissolved in water and the properties of the water changed. The reactive species were believed to be distributed mainly by convective transport in water, because the variation in the pH profile indicated by a methyl red solution resembled the induced flow pattern.