Modeling of a Rough-Wall Oscillatory Boundary Layer Using Two-Equation Turbulence Models
Publication: Journal of Hydraulic Engineering
Volume 135, Issue 1
Abstract
The standard turbulence model and two versions of blended models have been used to study the characteristics of a one-dimensional oscillatory boundary layer on a rough surface. The wall boundary condition for the specific dissipation rate of turbulent kinetic energy at the wall is specified in terms of a function based on wall roughness. A detailed comparison has been made for mean velocity, turbulent kinetic energy, Reynolds stress, and wall shear stress with the available experimental data. The three models predict the above properties reasonably well. In particular, the prediction of turbulent kinetic energy for the rough case by the blended models is much better than that for smooth oscillatory boundary layers as reported in previous studies. As a result of the present study, the use of one of the blended models in calculating the sediment transport in coastal environments may be recommended.
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Acknowledgments
A part of this study was completed when the first writer was on leave from Sultan Qaboos University, Oman to work at the University of Engineering and Technology, Taxila, Pakistan as a Visiting Professor in 2004 under the Higher Education Commission of Pakistan’s Expatriate Faculty Hiring Program and then in 2007 as a Visiting Researcher under the Japan Society for the Promotion of Science’s Invitation Fellowship Program at Tohoku University, Japan. The first writer is grateful to all the above organizations for their support.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 135 • Issue 1 • January 2009
Pages: 60 - 65
Copyright
© 2009 ASCE.
History
Received: Jun 22, 2007
Accepted: May 5, 2008
Published online: Jan 1, 2009
Published in print: Jan 2009
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