Modeling of Flow Around a Cylinder Over a Scoured Bed
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 131, Issue 1
Abstract
The hydrodynamics around a static horizontal cylinder and five static scoured bed profiles subjected to steady flow were simulated using a CFD model, FLOW-3D. Both a two-equation model and a Smagorinsky LES turbulence closure scheme were evaluated. The mean horizontal and vertical velocity estimates of both turbulence models show reasonable agreement with the data. Wake characteristics such as the reattachment point and vortex shedding were examined. The reattachment point for the closure scheme was consistent with the observations. However, the vortex shedding induced by the LES closure scheme resulted in a considerably larger and unsteady reattachment point. In all profiles, the size and strength of the eddies formed by the LES closure scheme were found to be grid dependent. The model was found to be grid dependent for the vortex shedding process.
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Acknowledgments
This study is funded partially by the Ohio State University College of Engineering and The Office of Naval Research—Mine Burial Project (Project number: N00014-00-1-0570). The writers would like to thank James Brethour of Flow Science, Inc., for all of his insight into the model, and Keith Bedford for his insight into turbulence modeling.
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Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 131 • Issue 1 • January 2005
Pages: 14 - 24
Copyright
© 2005 ASCE.
History
Received: Jul 31, 2002
Accepted: Aug 11, 2004
Published online: Jan 1, 2005
Published in print: Jan 2005
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