Onset of Three-Dimensional Thermal Convection in a Rectangular Parallelepiped Cavity
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概要
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The critical Rayleigh number for the onset of thermal convection in a horizontal rectangularparallelepiped cavity heated from below is evaluated numerically, and the three-dimensional flow pattern of the convection and the temperature distribution at the critical state are investigated. The top and bottom boundaries of the cavity are assumed to be perfectly heat-conductive, while the four sidewalls areassumed to be thermally insulating. The critical Rayleigh number is obtained to be 3389 for the case of cubic cavity and the velocity field at the critical state is revealed to have one global circulation. The critical condition and the flow field are obtained also for the cases other than the cubic cavity. It is found that the preferred mode is not always two-dimensional finite rolls with axes parallel to the shorter side, which differs from the conclusion derived for the case of perfectly conducting sidewalls by Davis.
- 社団法人日本物理学会の論文
- 2003-02-15
著者
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MIZUSHIMA Jiro
Department of Information Science,Sagami Institute of Technology
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NAKAMURA Takanori
Department of Pharmaceutical Health Care, Faculty of Pharmaceutical Sciences, Himeji Dokkyo Universi
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Mizushima Jiro
Department Of Information Science Sagami Institute Of Technology
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Mizushima Jiro
Department Of Mechanical Engineering Faculty Of Engineering Doshisha Unversity
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Nakamura Takanori
Department Of Mechanical Engineering Faculty Of Engineering Doshisha Unversity
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Nakamura Takanori
Department Of Chemistry Yokohama City University
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NAKAMURA Takanori
Department of Mechanical Engineering, Faculty of Engineering, Doshisha Unversity
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