Measurement of radical and degradation in small scale plasma for plasma medicine

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K17966
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Tohoku University
• Principal Investigator: Uehara Satoshi 東北大学, 流体科学研究所, 助教 (70742394)
• Research Collaborator: Nishiyama Hideya 東北大学, 流体科学研究所, 教授
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: プラズマ / 気泡流動 / 水質浄化 / キャピラリー放電 / 界面

Outline of Final Research Achievements

We conducted a discharge measurement of capillary discharge to clarify the pollutant decomposing effect of plasma in a small scale.We found that by using two pipes which has different diameters makes it possible to transport a discharged bubble in a capillary toward one direction.A high-speed camera was used to investigate the bubble dynamics responsible for the pumping effect, which is achieved by selecting the shape of the capillary such that the bubble ejections within enhance the “self-repetition” action required for the pumping motion. A theoretical model was developed to investigate the pumping mechanism. We solve the problems associated with liquid oscillations in the U-shaped water reservoir by employing a non-uniform cross-sectional area in our model. The chemical reactivity of the device was confirmed by using emission spectroscopy of OH radical and by measuring the decomposition of methylene blue.

Free Research Field

流体工学