Using Inclined Walls to Control the Bottom Shear Stress Distribution in an Annular Flume
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 11
Abstract
This study proposes a method to alter secondary flow pattern in a rotating annulus flume and obtain a resulting uniform bottom shear stress distribution along the radial direction by changing the shape of the channel cross section. Two or three wall angles, except for the bottom wall angle, are simultaneously changed up to 25° for different cross-sectional shapes. The flow characteristics in the channel are analyzed using the computational fluid dynamics technique to find the most effective configuration of the walls, including the rotating top ring. The results show that the bottom shear stress decreases and becomes uniform as the outer wall and the top ring angles increase. In the case of the inner wall, the wall angle has little effect on the bottom shear stress. The stress distribution is most uniform when the top ring, the outer wall, and the inner wall angles are 25, 25, and 5°, respectively.
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Acknowledgments
This work was partially supported by the Korea Institute of Marine Science & Technology Promotion (KIMST) under the project of Marine and Environmental Prediction System (MEPS).
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 11 • November 2011
Pages: 1470 - 1476
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 18, 2010
Accepted: May 6, 2011
Published online: May 7, 2011
Published in print: Nov 1, 2011
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