| Budget Amount *help |
¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2017: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
In this study, we have developed a method to directly measure the pressure distribution at the contact area of a droplet impacting a solid surface using a MEMS piezoresistive cantilever array. From the measurement results, the effects of the impact velocity and the droplet size on the maximum pressure at the contact area in the impact are clarified. It is also shown that the proposed sensor signal can be used to detect bubble entrapment and estimate the bubble size during droplet impact. We also measured the impact of droplets with a superhydrophobic blade and droplet merging. From the measurement results of droplet merging, it is shown that the viscosity and surface tension of the droplet can be estimated from the sensor output.
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