LES of a passive control for vortex shedding from bluff bodies: comparisons with experiments and near wake topology

A passive control is numerically investigated in this paper to effectively suppress the vortex shedding from bluff bodies. To implement the control, thr ee sinusoidal leading edge configurations are considered and compared to a straight square cylinder case. Large Eddy Simulati on (LES) is used to model the wall effects, as well as the near wake. Numerical velocity fluctuations in the near wake compare well with experimental data. The LES observations provide an accurate prediction of wake instability and near wake topology, otherwise not provided experimentally. This advantage can be used for further investigation of a thorough understanding and enhancement of control. Numerical case studies are presented using the software package FLUENT and the observations are pres ented in the form of design charts, as well as velocity spectra and near wake flow details.