Wake induced vibration is a distinctive phenomena of fluid-elastic instability arising from interactions of a body in the wakes of another bluff body and characteristically different from the well-understood vortex induced vibrations. This work presents a fluid-structure interactions numerical model as an alternative tool for investigation of wake induced vibrations. In an attempt to better understand mechanisms of wake induced motions, a simplified model of two cylinders in tandem arrangement with different diameters under cross flow was considered in this work. Cross flow velocity conditions vary from moderate to high Reynolds number (Re = 2 × 103–5 × 104) in the same range as many experiment reported recently in literature. A hybrid detached eddy simulation approach is used for turbulence modelling at those high Reynolds number conditions in order to resolve complex near body flow features as well as in the wake regions. The proposed model is first validated through extensive benchmarking with experimental studies for responses of tandem cylinders at the same flow conditions as in physical experiment. With good agreement to experimental data, the model was extended for simulations of cylinders of different diameters in tandem arrangement. For different diameters between upstream and downstream cylinders, the fundamental frequencies of shedded vortices from the cylinders are essentially different. It is observed from the present study that responses of the downstream cylinder are characterized not only the geometrical parameters such as distances and diameter differences between the cylinders but also the Reynolds number. As contrast to many experimental studies, at constant Reynolds number, downstream cylinders are found to have multiple lock-in regions in a wide range of reduced velocities. This distinctive behaviour of the cylinders at constant Reynolds numbers and diameter ratios suggests strong evidence of complicated mechanism of wake-induced vibrations phenomena. Further analysis of results from high fidelity numerical simulations were carried out for detailed investigations of force amplitudes and frequencies. The current analysis revealed multiple frequency content of the force; thus explaining high response amplitudes of the downstream cylinder at high reduced velocity.
Skip Nav Destination
ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
June 19–24, 2016
Busan, South Korea
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4993-4
PROCEEDINGS PAPER
Numerical Study of Wake-Induced Vibrations for Cylinders in Tandem With Different Diameters at High Reynolds Numbers
Vinh-Tan Nguyen,
Vinh-Tan Nguyen
A*STAR, Singapore, Singapore
Search for other works by this author on:
Wai Hong Ronald Chan,
Wai Hong Ronald Chan
A*STAR, Singapore, Singapore
Search for other works by this author on:
Hoang-Huy Nguyen
Hoang-Huy Nguyen
A*STAR, Singapore, Singapore
Search for other works by this author on:
Vinh-Tan Nguyen
A*STAR, Singapore, Singapore
Wai Hong Ronald Chan
A*STAR, Singapore, Singapore
Hoang-Huy Nguyen
A*STAR, Singapore, Singapore
Paper No:
OMAE2016-54564, V002T08A070; 9 pages
Published Online:
October 18, 2016
Citation
Nguyen, V, Chan, WHR, & Nguyen, H. "Numerical Study of Wake-Induced Vibrations for Cylinders in Tandem With Different Diameters at High Reynolds Numbers." Proceedings of the ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. Volume 2: CFD and VIV. Busan, South Korea. June 19–24, 2016. V002T08A070. ASME. https://doi.org/10.1115/OMAE2016-54564
Download citation file:
18
Views
Related Proceedings Papers
Related Articles
Three-Dimensional Large Eddy Simulations and Proper Orthogonal Decomposition Analysis of Flow Around a Flexibly Supported Circular Cylinder
J. Offshore Mech. Arct. Eng (December,2022)
Flow Structure in the Wake of a Rotationally Oscillating Cylinder
J. Fluids Eng (June,2000)
Velocity Correlation and Vortex Spacing in the Wake of a Vibrating Cable
J. Fluids Eng (March,1976)
Related Chapters
Vortex-Induced Vibration
Flow Induced Vibration of Power and Process Plant Components: A Practical Workbook
Random Turbulence Excitation in Single-Phase Flow
Flow-Induced Vibration Handbook for Nuclear and Process Equipment
Computational Modeling of Dynamic Planing Forces
Proceedings of the 10th International Symposium on Cavitation (CAV2018)