| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2013: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
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| Outline of Final Research Achievements |
The shock wave-bubble interaction was investigated numerically using an improved ghost fluid method by considering the nonequilibrium phase transition through the bubble interface. The simulation was in good agreement with the corresponding experiment. Also, the cavitation inception by the backscattering of ultrasound from a bubble was investigated experimentally and numerically. The relationship between the cavitation inception location and the pressure field around the bubble was characterized. The growth mechanism of cavitation cloud by the backscattering of ultrasound was clarified. The growth and collapse of a bubble between two parallel rigid walls were also investigated experimentally and numerically. The regimes of bubble collapse between the walls were obtained, and the influence of liquid jets and shock waves by bubble collapse on the material damages was clarified.
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