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AbstractThe flow field around a vortex induced vibrating cylinder is analyzed by the numerical simulation using the discrete vortex model. When the vortex shedding locks in the vibration, the separated shear layers sway in a body like a pendulum.The locked-in is not the necessary condition of the vortex induced vibration, but the vibration develops when the vortex does not shed synchronously with the vibration. At the unsynchronous state, the rolling up of the separated shear layers are prevented and promoted alternatively by the cylinder movement at every few cycles of the vibration. The energy which encourages the movement of the cylinder is supplied when the rolling up of the shear layer is promoted by the movement. The effect of the splitter plate in the wake was also investigated and the result of the simulation compared with the flow patterns experimentally obtained from the smoke wire method. The simulated flow patterns agree well with the one which were experimentally obtained.
AbstractThe flow field around a vortex induced vibrating cylinder is analyzed by the numerical simulation using the discrete vortex model. When the vortex shedding locks in the vibration, the separated shear layers sway in a body like a pendulum.The locked-in is not the necessary condition of the vortex induced vibration, but the vibration develops when the vortex does not shed synchronously with the vibration. At the unsynchronous state, the rolling up of the separated shear layers are prevented and promoted alternatively by the cylinder movement at every few cycles of the vibration. The energy which encourages the movement of the cylinder is supplied when the rolling up of the shear layer is promoted by the movement. The effect of the splitter plate in the wake was also investigated and the result of the simulation compared with the flow patterns experimentally obtained from the smoke wire method. The simulated flow patterns agree well with the one which were experimentally obtained.
Vortex induced vibration of circular cylinder
Kawai, H (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 46-47 ; 605-610
1993-01-01
6 pages
Article (Journal)
Electronic Resource
English
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