Study on the turbulent stripe toward an unified concept of sub-critical transition in channel flow
| Project/Area Number |
22760136
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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 | Tokyo University of Science |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 壁乱流・・ / 乱流遷移 / DNS / 流体工学 / 壁乱流 / 乱流 / 遷移 / 再層流化 / 乱流縞 / 並行平板間流 / コリオリ不安定 / PIV / コリオリ力 / 平行平板間流 |
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| Research Abstract |
A series of large-scale DNS (direct numerical simulations) and flow-visualization experiments were conducted in two types of plane channel flows, i.e., plane Poiseuille flow and plane Couette flow , in the subcritical-transition regime. Both flows give rise to coexisting laminar and turbulent equilibrium regions in the form of oblique stripes, so-called the turbulent stripe. We found that the turbulence stripe is an intrinsic phenomenon for the transition and the reverse transition in a channel flow.According to the present results, we proposed a unified physical model for the transitional state and process of the turbulent channel flows
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Report
(4 results)
Research Products
(32 results)
