Abo Bibliothek: Guest
Fourth International Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2005, Marriot Hotel, Williamsburg, Virginia, USA

DOI: 10.1615/TSFP4

STUDY ON THE FLOW PAST CIRCULAR CYLINDER WITH OSCILLATING ROTATION BY LES

pages 555-558
DOI: 10.1615/TSFP4.930
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ABSTRAKT

Flow past circular cylinder with oscillating rotation is investigated by Large Eddy Simulation (LES) at Reynolds number 3900 based on the free stream velocity U and radius of the cylinder D. The dynamic Smagorinsky model is used for the closure of the subgrid stress and the immersed boundary method is applied to the non-slip condition at cylinder surface. The results of stationary cylinder are compared with previous numerical and experimental data with satisfaction. The drug is increased when the oscillation rate is equal to the vortex shedding frequency of the flow past stationary cylinder while the drug is reduced at the oscillating rate equaling five times of vortex shedding frequency of the flow past stationary cylinder. The vortex patterns show that the big vortices after the cylinder are suppressed at the high oscillation frequency and thus the drug is reduced.

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