| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Direct numerical simulations of the turbulent flow of liquid along a solid wall with phase change between liquid and solid was realized by combining the phase-field model. From the simulation, solidification structures such as dendrite were growing from the wall surface toward the flow field. These solidification structures started growing non-uniformly depending on the local flow patterns and temperature distribution formed by turbulence structures close to the wall surface. Then, owing to the growth of the solidification structures, the turbulence structures such as velocity streaks and quasi-streamwise vortices started to disappear, making the turbulent flow tend to be laminar. In particular, it was found that the local interaction between turbulence structures and solidification structures promoted the laminarization of turbulent flow.
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