Development of a method for the efficient production of sonoplasmas

2014 Fiscal Year Final Research Report

• Project/Area Number: 24654185
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Plasma science
• Research Institution: Hokkaido University
• Principal Investigator: SASAKI Koichi 北海道大学, 工学(系)研究科(研究院), 教授 (50235248)
• Co-Investigator(Kenkyū-buntansha): TOMIOKA Satoshi 北海道大学, 大学院工学研究院, 准教授 (40237110) ; NISHIYAMA Shusuke 北海道大学, 大学院工学研究院, 助教 (30333628) ; TAKADA Noriharu 名古屋大学, 大学院工学研究科, 技術専門員 (50422788)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ソノプラズマ / 液中プラズマ / 超音波 / キャビテーションバブル

Outline of Final Research Achievements

In this work, we have proposed the mechanism by which the efficient production of sonoplasmas is achieved in a sonoplasma production system with the help of a punching metal plate. Small bubbles are produced at the sharp edges of holes on the punching metal plate. They are transported by the primary Bjerknes force toward the bottom side of the vessel, and are trapped at the dip in the distribution of the ultrasonic pressure. These processes result in standing cavitation bubbles with a high density. The present method is unique as a method for producing liquid-phase plasmas without using high voltages. It can be utilized for enhancing the rates of various sonochemistry processes.

Free Research Field

プラズマ応用工学