Second Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP2
NUMERICAL INVESTIGATION OF THE STABILITY AND CONTROL OF SEPARATING BOUNDARY-LAYER FLOW
pages 413-417
DOI: 10.1615/TSFP2.1430
RESUMO
A boundary-layer flow along a bump is investigated numerically. At the rear of the bump the flow separates and the separation bubble becomes unstable above a critical Reynolds number. The resulting vortex shedding is reproduced numerically. Performing a local linear stability analysis of velocity profiles inside the separation bubble, it is shown that there is a relationship between a local absolute instability and the numerically observed global flow behaviour. First numerical experiments of flow control, reducing the recirculation length using blowing and suction, are performed as well.