| A Simple Eddy Viscosity Model of Rough Turbulent Wave Boundary Layer |
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| 作者单位： | Hsu Tai-Wen and Lin Hwung-Yui
Associate Professor，Department of Hydraulics and Ocean Engineering，National Cheng Kung University，Tainan
Graduate student，Department of Hydraulics and Ocean Engineering，National Cheng Kung University，Tainan |
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| 摘 要： | - A one-layer time-invariant eddy viscosity model is specified to develop a mathematical model for describing the essential features of the turbulent wave boundary layer over a rough bed. The functional form of the eddy viscosity is evaluated based on computational results from a two-equation turbulence model in which the eddy viscosity varies with time and space. The present eddy viscosity model simplifies much of the mathematical complexity in many existing models. Predictions from the present model have been compared with a wide range of experimental data. It is found that the eddy viscosity model adopted in the present study is physically reasonable.
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A Simple Eddy Viscosity Model of Rough Turbulent Wave Boundary Layer |
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| Authors: | Hsu Tai-Wen and Lin Hwung-Yui Associate Professor |
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| Institution: | Hsu Tai-Wen and Lin Hwung-Yui
Associate Professor,Department of Hydraulics and Ocean Engineering,National Cheng Kung University,Tainan
Graduate student,Department of Hydraulics and Ocean Engineering,National Cheng Kung University,Tainan |
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| Abstract: | - A one-layer time-invariant eddy viscosity model is specified to develop a mathematical model for describing the essential features of the turbulent wave boundary layer over a rough bed. The functional form of the eddy viscosity is evaluated based on computational results from a two-equation turbulence model in which the eddy viscosity varies with time and space. The present eddy viscosity model simplifies much of the mathematical complexity in many existing models. Predictions from the present model have been compared with a wide range of experimental data. It is found that the eddy viscosity model adopted in the present study is physically reasonable. |
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| Keywords: | turbulent wave boundary layer eddy viscosity wave fiction factor |
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