Abstract
Large-eddy simulation with a dynamic subgrid-scale model and nondissipative numerics is employed to predict the turbulent flow separation over a wall-mounted hump and its control. Large-eddy simulation results for the baseline (no control), steady suction, and oscillatory-Jet control cases are compared with the results of experimental measurements and previous computational predictions using large-eddy simulation with a constant coefficient Smagorinsky model and dissipative numerics, implicit large-eddy simulation, detached eddy simulation, and unsteady Reynolds-averaged Navier-Stokes simulation. The present large-eddy simulation is shown to be consistently more accurate than the previous numerical approaches in predicting the experimentally measured flow quantities such as the pressure coefficient, reattachment length, mean velocity, and turbulence statistics. It is shown that steady suction and synthetic jet oscillations cause a reduction of the reattachment length by about 12.8 and 7.3 %, respectively, compared with the uncontrolled case.
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