An Attempt to Produce Electrical Discharges in Acoustic Cavitation Bubbles

• TAKADA Noriharu

  Technical Center, Nagoya University

• HAYASHI Yui

  Department of Chemical Engineering, Nagoya University

• GOTO Motonobu

  Department of Chemical Engineering, Nagoya University

• SASAKI Koichi

  Division of Quantum Science and Engineering, Hokkaido University

Abstract

It is widely known that cavitation bubbles are not static bubbles but have the dynamics of the expansion, the shrinkage, and the collapse. In this work, we produced electrical discharges in acoustic cavitation bubbles for the first time with the intension of enhancing the reactivity of sonochemical processes. Glow-like discharges were observed in cavitation bubbles on the bottom surface of the cylindrical electrode which was connected to a pulsed high-voltage power supply. Bright optical emission was observed from the region corresponding to the cloud of expanded cavitation bubbles, while we also observed electrical discharges even in the shrinking phase of cavitation bubbles. If discharge-produced reactive species have lifetimes that are longer than the interval between the discharge and the collapse of the cavitation bubble, the species composition in the collapsed cavitation bubble becomes different from that in conventional cavitation bubble, which may result in the enhancement of reactivity in sonochemical processes.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 11 (0), 1406113-1406113, 2016

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• acoustic cavitation
• glow-like discharge
• temporal evolution
• nonequilibrium sonochemistry

Details

• CRID: 1390282680231760256
• NII Article ID: 130005330519
• DOI: 10.1585/pfr.11.1406113
• ISSN: 18806821
• Web Site: https://www.jstage.jst.go.jp/article/pfr/11/0/11_1406113/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed