| Project/Area Number |
07640571
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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 |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Kyoto University |
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Principal Investigator |
SAKAI Satoshi Kyoto University, Integrated Human Studies, Associate Professor, 総合人間学部, 助教授 (30144299)
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| Project Period (FY) |
1995 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | rotating convection / laboratory experiment / deep water / 回転流体力学 / 対流 / 海洋 |
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| Research Abstract |
Horizontal scale of rotating convection with rigid boundary conditions is studied. The range of Rayleigh number concerned is moderate, i.e., large enough to induce a finite amplitude convection but small enough so that the geostrophic processes are significant.
Considering experimental law of Nusselt number and some constraints of elemental geostrophic processes, the horizontal scale of the convection can be estimated. This estimation strongly depends on the ratio between thicknesses of the Ekman layr and the thermal boundary layr, and does not depend monotonically on the Rayleigh number. This dependency is compatible with the experimental results of Rossby (1969).
The estimated horizontal scale was checked by laboratory experiments. The horizontal temperature distribution was visualized by thermal 1iquid crystal capsules dispersed in the working fluid. The horizontal scale was measured by counting vortices. The experimental results agrees fairly well with the estimated scale.
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