| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Fluid behavior in microgravity is different from in ground gravity since surface tension and wetting are dominant. In propellant tank for spacecraft, sloshing due to disturbance and settling behavior by change of acceleration have to be understood for design of propellant supply system. These fluid behaviors are affected by a dynamic wetting significantly, therefore it is important to understand this. We observed fluid behaviors in cylindrical containers in microgravity conditions created by drop tower facility, and effect of viscosity and diameter of container on fluid behaviors were investigated. CFD analyses considering interrelationship between microscopic dynamic wetting and macroscopic fluid behavior were conducted and these results were compared with experimental results. It was confirmed that numerical model considering dependence of contact line velocity in dynamic contact angle by theoretical methods including microscopic phenomena provided more reasonable results.
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