| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Outline of Final Research Achievements |
We have developed a two-dimensional LBM model that can simulate interaction of a water droplet with sound by introducing two different kinds of particles for the liquid and gaseous phases. The most striking difference between the liquid and gaseous phases is their density and compressibility, and their differences are modeled by the use of appropriate intermolecular forces. With these modifications being incorporated, a newly developed LBM model is able to simulate a collision of a droplet and quiescent surface appropriately. Specifically, the underwater sound was generated by the collision of the droplet with the water surface and it propagates either in a droplet and liquid phase, as well as into the air. At the same time, small air bubbles are generated and thus make the sound propagation to be a dipole type.
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