Dissimilar heat transfer enhancement in porous channel turbulence
| Project/Area Number |
23656138
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Osaka University |
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Principal Investigator |
KAWAHARA Genta 大阪大学, 基礎工学研究科, 教授 (50214672)
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| Co-Investigator(Renkei-kenkyūsha) |
KATOH Kenji 大阪市立大学, 大学院・工学研究科, 教授 (10177438)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 乱流 / 多孔質伝熱面 / 伝熱促進 / 非相似性 / 多孔質壁面 |
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| Research Abstract |
In case of small porosity on the wall, no significant difference has been observed in a skin friction coefficient or the Stanton number in comparison to an impermeable wall. For large wall porosity, however, turbulent heat and momentum transfer is found to be remarkably enhanced by the introduction of the porous wall. Weak but non-negligible dissimilarity, i.e., the higher Stanton number and the lower skin friction coefficient, is observed between heat and momentum transfer. The physical mechanism of this dissimilarity is interpreted in terms of the relevance of the large-scale spanwise rolls with their induced turbulent heat flux and Reynolds stress.
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Report
(4 results)
Research Products
(89 results)
