2011 Fiscal Year Final Research Report
Dynamics of film drainage between two pulsating bubbles for medical ultrasound
| Project/Area Number |
22760118
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | Hirosaki University |
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Principal Investigator |
SHIROTA Minori 弘前大学, 大学院・理工学研究科, 助教 (40423537)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 混相流 / 超音波医療 / 気泡 / キャビテーション |
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| Research Abstract |
Drainage of film between two pulsating bubbles in an ultrasound standing wave field was quantitatively evaluated by using high-speed imaging and digital image processing. Experimental results on the film drainage were compared with existing theoretical models. As results, we clarified that a quasi-static dynamic model underestimates the drainage time, while a kinetic model overestimates the time. We also experimentally observed the oscillatory translational motions of two bubbles both of which are larger than resonance size
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