Fluid flow in a rotating curved rectangular duct |
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Authors: | Jinsuo Zhang Benzhao Zhang and Jianwei Jü |
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Institution: | Department of Mechanics, Zhejiang University, Hangzhou 310027, People's Republic of China |
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Abstract: | The fluid flowing in a rotating curved duct is subjected to both the Coriolis force due to a rotation and the centrifugal force due to a curvature. In this paper, the combined effects of the two forces on the flows in rotating curved rectangular ducts are examined numerically. According to the aspect ratio of the cross-section, the rectangular ducts are divided into three types: η>1, η=1, η<1, where η is the aspect ratio. The variations of the flow structures with the force ratio F (the ratio of the Corislis force to the centrifugal force) are studied in detail and many hitherto unknown flow patterns are found. The effects of the force ratio and the aspect ratio of the cross-section on the friction factor are also examined. Present results show both the characteristics of the secondary flow, axial flow and the natures of the friction factor. |
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Keywords: | Secondary flow Rotating ducts Curved ducts |
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