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Turbulent Flow over Periodic Hills

Author(s): P. Prinos; D. Sofialidis

Linked Author(s): Panagiotis Prinos

Keywords: Turbulence models; Periodic hill; Separation; Reattachment

Abstract: Turbulent flow over periodic hills, a streamwise periodic channel geometry with an expansion, a uniform–height and a constriction part, is studied numerically with turbulence models of various types (k-ε, Reynolds stress etc.). This particular flow configuration was among the test cases of the 9t h ERCOFTAC/IAHR Workshop on Refined Turbulence Modelling (2001) and computed results by the various models are compared with available high quality Large Eddy Simulation (LES) data of Temmerman & Leschziner (2001). The Reynolds stress model of Launder et al (1975), in conjunction with the two-layer zonal model for the wall treatment performs better than the other two models (the low–Re model of Launder & Sharma (1974) and the standard k–ε model, combined with the two–layer zonal model). Three different meshes were tested with the standard k–ε model, for assessing the effect of grid type and near–wall resolution on the results.


Year: 2003

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