A Near-Wall Model for Separated Turbulent FlowsSource: Journal of Fluids Engineering:;1992:;volume( 114 ):;issue: 004::page 694Author:U. C. Goldberg
DOI: 10.1115/1.2910089Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A near-wall model for separated turbulent flows is presented and evaluated. The model is based on experimental observations, in particular, the wake-like behavior of turbulence away from walls, the influence of walls on this behavior, the diffusion/dissipation energy balance observed in the backflow portion of detached flow regions, and the near-wall behavior of eddy-viscosity. These lead to two analytically solvable ODE’s for the normal-to-wall behavior of turbulence kinetic energy and eddy-viscosity. The model is applied in conjunction with an outer eddy-viscosity model (such as a k–ε model) to predict eddy-viscosity distribution in separated flow regions. Predictions of two flow cases, using this approach, are shown.
keyword(s): Turbulence , Eddies (Fluid dynamics) , Viscosity , Flow (Dynamics) , Diffusion (Physics) , Kinetic energy , Energy budget (Physics) , Energy dissipation AND Wakes ,
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| contributor author | U. C. Goldberg | |
| date accessioned | 2017-05-08T23:38:43Z | |
| date available | 2017-05-08T23:38:43Z | |
| date copyright | December, 1992 | |
| date issued | 1992 | |
| identifier issn | 0098-2202 | |
| identifier other | JFEGA4-27071#694_1.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/110404 | |
| description abstract | A near-wall model for separated turbulent flows is presented and evaluated. The model is based on experimental observations, in particular, the wake-like behavior of turbulence away from walls, the influence of walls on this behavior, the diffusion/dissipation energy balance observed in the backflow portion of detached flow regions, and the near-wall behavior of eddy-viscosity. These lead to two analytically solvable ODE’s for the normal-to-wall behavior of turbulence kinetic energy and eddy-viscosity. The model is applied in conjunction with an outer eddy-viscosity model (such as a k–ε model) to predict eddy-viscosity distribution in separated flow regions. Predictions of two flow cases, using this approach, are shown. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | A Near-Wall Model for Separated Turbulent Flows | |
| type | Journal Paper | |
| journal volume | 114 | |
| journal issue | 4 | |
| journal title | Journal of Fluids Engineering | |
| identifier doi | 10.1115/1.2910089 | |
| journal fristpage | 694 | |
| journal lastpage | 697 | |
| identifier eissn | 1528-901X | |
| keywords | Turbulence | |
| keywords | Eddies (Fluid dynamics) | |
| keywords | Viscosity | |
| keywords | Flow (Dynamics) | |
| keywords | Diffusion (Physics) | |
| keywords | Kinetic energy | |
| keywords | Energy budget (Physics) | |
| keywords | Energy dissipation AND Wakes | |
| tree | Journal of Fluids Engineering:;1992:;volume( 114 ):;issue: 004 | |
| contenttype | Fulltext |