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Fifth International Symposium on Turbulence and Shear Flow Phenomena
August, 27-29, 2007, Technische Universität München, Munich, Germany

DOI: 10.1615/TSFP5

LARGE EDDY SIMULATION OF TURBULENT BOUNDARY-LAYER SEPARATION

pages 321-326
DOI: 10.1615/TSFP5.490
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摘要

Highly resolved Large Eddy Simulation (LES) of turbulent boundary-layer separation are conducted. The behavior of incompressible fully-turbulent flat-plate boundary-layer flow subjected to a constant adverse pressure gradient (APG) is investigated. Reynolds number and pressure-gradient parameters are adapted to measurements conducted by Indinger et al. in a closed-circuit water tunnel. A special focus of analysis is placed on scaling laws for the mean-velocity profiles under non-equilibrium conditions approaching pressure-induced separation. Our computational results suggest that classical inner scaling remains valid for non-equilibrium even with intermittent detachment. Best predictions for the outer region are obtained with the scaling of Zaragola and Smits.

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