Acoustic streaming in a solid-liquid mixture and microbubbles-liquid mixture caused by ultrasonic wave irradiation
| Project/Area Number |
20560151
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | University of Fukui |
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Principal Investigator |
OHTA Junichi University of Fukui, 大学院・工学研究科, 教授 (20168941)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Keywords | 混相流 / 音響 / 超音波 / 気液二相流 / 固液二相流 / マイクロバブル |
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| 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.
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Report
(4 results)
Research Products
(16 results)
