| Project/Area Number |
21760143
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
ONISHI Ryo Japan Agency for Marine-Earth Science and Technology, 地球シミュレータセンター, 研究員 (30414361)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 混相流 / 豪雨予測 / 粒子衝突 / 直接数値計算 / 大規模並列計算 / 雲乱流 / 混相乱流 / 流体工学 |
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| Research Abstract |
A high-performance parallel code for particle-immersed turbulence has been developed to investigate turbulent collisions of inertial particles in air turbulence. The code adopts our original forcing method, named reduced communication forcing, to achieve a stationary state. The code has enabled us to obtain the statistics concerning turbulent collision frequency in as high as Re_λ=340, where Re_λ is Taylor microscale based Reynolds number. This data has revealed that a conventional collision frequency model underestimates turbulent collision frequency in high Re_λ flows.
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