Effect of Tank Size and Geometry on the Flow Induced by Circular Bubble Plumes and Water Jets
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 6
Abstract
Ambient flow field and circulation patterns induced by circular bubble plumes and water jets in tanks of different sizes were studied in rectangular and square water tanks. A nonstationary nature of the flow was observed in all experiments and its dominant oscillation frequency was found to directly relate to the tank size. The flow circulation patterns were similar for bubble plumes and water jets, but changed significantly with tank size and geometry. Strong three-dimensional effects were observed in a rectangular tank, resulting in flow entraining in the longer plane and flow detraining in the shorter plane, especially for the bubble plume tests. A relationship was developed to relate the tank size to the patterns of circulation cells. Nearly isotropic turbulent flow conditions were obtained in all experiments, but the effect of tank size and geometry on the magnitude of the turbulent stresses was more pronounced in the bubble plume tests.
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Acknowledgments
I.E.L.N. is supported by the Coordination for the Improvement of Higher Education Personnel Foundation (CAPES), Ministry of Education, Brazil. The writers are thankful to Perry Fedun and Chris Krath for building the experimental apparatus.
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Information
Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 6 • June 2008
Pages: 833 - 842
Copyright
© 2008 ASCE.
History
Received: Feb 15, 2007
Accepted: Jun 26, 2007
Published online: Jun 1, 2008
Published in print: Jun 2008
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