Acoustic streaming in a solid-liquid mixture and microbubbles-liquid mixture caused by ultrasonic wave irradiation

2010 Fiscal Year Final Research Report

• Project/Area Number: 20560151
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: University of Fukui
• Principal Investigator: OHTA Junichi University of Fukui, 大学院・工学研究科, 教授 (20168941)
• Project Period (FY): 2008 – 2010
• Keywords: 混相流 / 音響 / 超音波

Research Abstract

The purpose of the present project is to clarify fundamental phenomena of solid particles, microbubbles, and acoustic streaming in the case of irradiating ultrasonic waves onto solid-liquid two-phase mixtures or microbubbles-liquid mixtures with a circular plate-ultrasonic transducer. The information is needed for numerical analyses. The following results were obtained : Acoustic streaming in a mixture of nylon particles and tap water resembles that in liquid streaming, so called Eckart flow (acoustic streaming). On the other hand, the behavior of microbubbles and acoustic streaming in a mixture of microbubbles and water were greatly changed by the ultrasonic frequency. This was explained by the directionality of a circular plate-ultrasonic transducer. Microbubbles were affected by the acoustic radiation force and did not always follow the liquid flow. Hence, one must analyze liquids and microbubbles separately.

Research Products

• [Presentation] Velocity measurements of acoustic streaming in a solid-liquid mixture generated by an ultrasonic wave (effects of irradiation time and particle shape) (2010)
  • Author(s): M.Onaru, M.Iguchi, Y.Sasaki, J.Ohta
  • Organizer: Proc.of 2010 International Symposium on Advanced Mechanics and Power Engineering
  • Place of Presentation: University of Fukui
  • Year and Date: 2010-11-12
• [Presentation] Behavior of solid particles and microbubbles in a liquid under ultrasonic waves (2010)
  • Author(s): N.Doyama, K.Yamada, K.Ishikawa, D.Wakabayashi, S.Iwamoto, J.Ohta
  • Organizer: Proc.of 2010 International Symposium on Advanced Mechanics and Power Engineering
  • Place of Presentation: University of Fukui
  • Year and Date: 2010-11-12
• [Presentation] 超音波によって発生した混相媒体中の音響流の速度測定 (2010)
  • Author(s): 大成将仁, 井口将浩, 太田淳一
  • Organizer: 日本混相流学会年会講演会2010
  • Place of Presentation: 静岡大学工学部(講演論文集)
  • Year and Date: 2010-07-17
• [Presentation] 超音波によって発生した音響流の特性 (2009)
  • Author(s): 井口将浩, 大西慶彦, 太田淳一
  • Organizer: 日本混相流学会年会講演会2009
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-08-09
• [Presentation] 超音波照射下の固液混合液内の粒子挙動(粒子集合条件と集合位置) (2009)
  • Author(s): 堂山直紀, 山田啓太, 太田淳一
  • Organizer: 日本混相流学会年会講演会2009
  • Place of Presentation: 熊本大学(講演論文集)
  • Year and Date: 2009-08-09
• [Presentation] 超音波によって発生した音響流に関する研究 (2009)
  • Author(s): 井口将浩, 大西慶彦, 太田淳一
  • Organizer: 第42回北陸流体工学研究会
  • Place of Presentation: 富山県立大学
  • Year and Date: 2009-02-28
• [Presentation] 超音波照射下の固液混合液内の粒子挙動(粒子集合位置と音圧分布) (2008)
  • Author(s): 山田啓太, 橋本佳洋, 太田淳一
  • Organizer: 日本混相流学会年会講演会2008
  • Place of Presentation: 会津大学(講演論文集)
  • Year and Date: 2008-08-08
• [Remarks] ホームページ等
• [Remarks] 堂山直紀,円形平面音源による超音波照射の液中にある微小気泡と粒子の挙動に及ぼす影響,平成22年度福井大学大学院工学研究科修士論文,(2011.3)
• [Remarks] 井口将浩,超音波によって発生した音響流の速度測定,平成21年度福井大学大学院工学研究科修士論文,(2010.3)
• [Remarks] 山田啓太,固液混合液内の粒子挙動に及ぼす超音波の影響(粒子集合条件と集合位置),平成20年度福井大学大学院工学研究科 修士論文,(2009.3)