Please use this identifier to cite or link to this item:
https://hdl.handle.net/11681/13198
Title: | A turbulence model for recirculating flow |
Authors: | United States. Bureau of Reclamation United States. Department of the Army Bernard, Robert S. |
Keywords: | Incompressible flow Recirculating flow Numerical models Numerical modeling Turbulence Turbulence models Turbulence modeling Reynolds number Fluid dynamics |
Publisher: | Hydraulics Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
Series/Report no.: | Technical report (U.S. Army Engineer Waterways Experiment Station) ; HL-91-14. |
Description: | Technical Report Abstract: A simple adjustment is proposed that improves the predictions of the standard k-ϵ turbulence model in the presence of two-dimensional recirculating flow. An eddy Reynolds number calculated from velocity, vorticity, and eddy viscosity is introduced as a scaling parameter for reducing the decay term in the governing equation for the turbulence-energy dissipation rate. Using the adjusted k-ϵ model to compute the flow past a backstep (channel expansion), the STEMR finite-difference code gives better predictions for streamlines, velocities, and turbulence energies than it does with the standard k-ϵ model. Computed reattachment lengths compare well with experimental data for channel expansion ratios between 1 and 2. |
Rights: | Approved for public release; distribution is unlimited. |
URI: | http://hdl.handle.net/11681/13198 |
Appears in Collections: | Technical Report |
Files in This Item:
File | Description | Size | Format | |
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TR-HL-91-14.pdf | 1.6 MB | Adobe PDF | View/Open |