Numerical investigation of vortex-induced vibration of a circular cylinder close to a plane boundary subject to oscillatory flow

• Published in: Volume 2: CFD and VIV
• Main Authors: Munir, Adnan (S32797), Zhao, Ming (R16667), Wu, Helen (R17002)
• Other Authors: School of Computing, Engineering and Mathematics (Host institution), International Conference on Ocean, Offshore and Arctic Engineering (Event place)
• Format: Conference Object
• Language: English
• Published: U.S., ASME 2016
• Subjects: 090599 - Civil Engineering not elsewhere classified; vortex-induced vibration; cylinders; reynolds number; Navier–Stokes equations; Arctic
• Online Access: http://handle.uws.edu.au:8081/1959.7/uws:36334; https://www.asme.org/events/omae; https://doi.org/10.1115/OMAE2016-54338

This paper presents a numerical study of flow around an elastically mounted circular cylinder in close proximity to a plane boundary vibrating in the transverse and inline directions in an oscillatory flow. The Reynolds-Averaged Navier-Stokes (RANS) equations and the SST k-w turbulent equations are solved using the Arbitrary Langrangian-Eulerian (ALE) scheme and Petrov-Galerkin Finite Element Method for simulating the flow. The equation of motion is solved using the fourth-order Runge-Kutta method to find the displacements of the cylinder in the transverse and incline directions. The numerical model is validated against the previous results of vortex-induced vibration of an isolated circular cylinder in both cross-flow and inline directions. The flow model is further extended to study the vortex-induced vibration of a cylinder near a plane boundary with a very small gap ratio (e/D) of 0.01, with D and e being the diameter and the gap between the cylinder and the plane boundary, respectively. Simulations are carried out for two Keulegan-Carpenter (KC) numbers of 5 and 10 and a wide range of reduced velocities. It is observed that both the KC number and the reduced velocity affect the vibration of the cylinder significantly.