| Project/Area Number |
11650225
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
MASUOKA Takashi KYUSHU UNIVERSITY, Faculty of Tech, Prof., 大学院・工学研究院, 教授 (30039101)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1999: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Natural Convection / Porous / Chaos / Hele-Shaw Cell / Lyapunov Exponent / Entropy Generation / Hele-Shaw近似 |
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| Research Abstract |
An experimental and numerical study has been made on the effect of inertia force on the chaotic behaviors of thermal convection in porous meida. The existence of the microscopic chaos of the order of the porous structures was experimentally and numerically confirmed. The Lvapunov exponent distributions around the microscopic structures indicate the local inertial effect due to the expansion and contraction of the microscopic flow passages yields the microscopic chaotic behaviors, which are different from the macroscopic chaotic behaviors due to the potential instability of the thermal boundary layeres caused by the buoyancy. Further it is indicated that the local entropy generation becomes large at the locations where the Lvapunov exponent becomes relatively less, which will be of very interest since the chaotic behaviors will be fundamentally suppuressed in the pattern selection or pattern formation mechanism. The confirmtion of the microscopic chaos will also be of interest in connecton with the concept of the inverse cascade process from the small-scale to large-scale motions.
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