CFD simulation of vortex-induced vibration of a bluff body structure by ANSYS fluent

Abdul Rahman, Abdul Halim (2015) CFD simulation of vortex-induced vibration of a bluff body structure by ANSYS fluent. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Vortex-induced vibration is a vibration phenomenon which occurred to the bluff body structure either on the ground or sea underneath. The investigations of the effect of flow velocity on the transverse vibration of bluff body were done to determine the vortex shedding frequency for each of the analyses. Besides it was also to investigate the flow velocity and pressure loss in the time response. Despite the investigation made by other researchers, a study on a very high turbulence Reynolds number, were still blurred unknown. In response to this problem, this study is purposely to investigate at a very high Reynolds number and simulated through ANSYS Fluent software’s which started from a minimum of 70 000 Reynolds number and increased to the maximum of 350 000 Reynolds number. A one meter in diameter of cylindrical aluminium was used for the study where the velocity was in cross-flow direction. From the simulated results, it could be seen the fluid flow after the boundary layer was an asymmetric flow. The Strouhal number seems to be decreased by the increase of Reynolds number while the frequencies were increased with the increased of Reynolds number.

Item Type:Thesis (Masters)
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA349-359 Mechanics of engineering. Applied mechanics
ID Code:7694
Deposited By:Normajihan Abd. Rahman
Deposited On:29 Feb 2016 16:29
Last Modified:29 Feb 2016 16:29

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