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|Title:||Vortex street wakes of a rotating circular cylinder|
|Authors:||Cheng, M. |
|Source:||Cheng, M.,Chen, Y.T.,Luo, S.C. (1994). Vortex street wakes of a rotating circular cylinder. Proceedings of the International Offshore and Polar Engineering Conference 3 : 434-440. ScholarBank@NUS Repository.|
|Abstract:||The evolution of the vortex street behind a rotating circular cylinder in uniform free stream is investigated numerically at high Reynolds number. The ratio of the cylinder surface velocity to the free stream velocity, α is in the range 0 ≤ α ≤ 3. The method used to calculate the flow can be considered as a combination between the diffusion-vortex method and the vortex-in-cell method. The lift and drag forces exerted by the fluid on the cylinder surface as well as the Strouhal number of vortex shedding, are determined together with the flow patterns in the wake. It was found that the vortex shedding and wake development behind the cylinder vary significantly depending on the magnitude of the rotation parameter α. When α ≤2. the vortex street behind the cylinder in the near-wake inclines as a whole towards the direction of rotation as α increases. The Karman vortex street structure begins to deteriorate as soon as α exceeds 2 and finally disappears for α =3.|
|Source Title:||Proceedings of the International Offshore and Polar Engineering Conference|
|Appears in Collections:||Staff Publications|
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