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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : A numerical study on vortex-induced vibration of an array of circular cylinders
A numerical study on vortex-induced vibration of an array of circular cylinders
Author : LIN CHENG, PENGZHI LIN
ABSTRACT
An array of circular cylinders is a basic unit in many engineering applications, such as buoyancy columns of a semisubmersible
platform, risers and cables etc. The vortex-induced vibration (VIV) of the cylinder array is an important
phenomenon in engineering applications, which is also of great general interest to fluid dynamics researchers. The
complexity of flow separation and the unsteady wakes generated by the cylinder array could induce severe structure
vibration. Most of the earlier studies on VIV have been focused on the vibration of a single circular cylinder. However, the
VIV of a group of cylinders is still not fully understood. In this paper, a virtual boundary force (VBF) method, which is
adopted in an in-house numerical model NEWTANK, is used to study the vortex-induced vibration of cylinder array. In
this paper, we discussed three kinds of the initial configurations of the cylinder array, including two side-by-side
cylinders, two tandem cylinders and three equilateral arranged cylinders. The trajectory, wake interference and the
related hydrodynamic characteristic are discussed in this paper. As a result, we obtained different forms of the
interaction between the VIV cylinders according to different configurations.
File Size : 1,950,023 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 18/08/2015
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