Summary
A two-layer turbulence model is described which uses the standard k-ε model in the bulk of the flow and resolves the viscosity-affected regions near walls with a one-equation model based on empirical length-scale prescriptions. Applications of the two-layer model to the following separated flows are presented: flow over a backward-facing step, over a T-profile, over a channel bed with periodic dunes and past an airfoil at 14° angle of attack. In all cases with larger separation regions, the two-layer model yielded a significant improvement of the predictions compared with the standard k-ε model using wall functions; in particular the length of the separation region is predicted in better agreement with the experiments.
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© 1993 Springer Fachmedien Wiesbaden
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Cordes, J., Rodi, W., Cho, N.H. (1993). Calculation of Separated Flows with a Two-Layer Turbulence Model. In: Gersten, K. (eds) Physics of Separated Flows — Numerical, Experimental, and Theoretical Aspects. Notes on Numerical Fluid Mechanics (NNFM), vol 40. Vieweg+Teubner Verlag, Wiesbaden. https://doi.org/10.1007/978-3-663-13986-7_4
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DOI: https://doi.org/10.1007/978-3-663-13986-7_4
Publisher Name: Vieweg+Teubner Verlag, Wiesbaden
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