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Erschienen in:
2016 | OriginalPaper | Buchkapitel
Fluid Forces on a Flexible Circular Cylinder in Vortex-Induced Vibrations
verfasst von : C. Monreal-Jiménez, F. Oviedo-Tolentino, G. L. Gutiérrez-Urueta, R. Romero-Méndez, G. Mejía-Rodríguez
Erschienen in: Recent Advances in Fluid Dynamics with Environmental Applications
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Abstract
In this work fluid forces acting on a flexible circular cylinder in Vortex-Induced Vibrations (VIV) were studied. An experimental campaing was conducted at low mass-damping ratio (\(\mathrm {m_{cil}^{*}\zeta }\) = 0.126) covering the entire lock-in region. The dynamic response of the cylinder was computed using the Particle Tracking Velocimetry technique on the cylinder free end tip. Drag and lift coefficients (\(C_{D}\) and \(C_{L}\)) were determined using the experimental data from the cylinder response in a spring-mass-damping model. Results show that \(C_{L}\) is one order of magnitude greater than \(C_{D}\). Strong cylinder oscillations are associated with a flow pattern showing two vortex center lines corresponding mainly at the upper end of the initial region.