DOI: 10.1615/TSFP5
LARGE EDDY SIMULATION OF TURBULENT BOUNDARY-LAYER SEPARATION
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.