TY - JOUR
T1 - Fluid-structure interaction among three tandem circular cylinders oscillating transversely at a low Reynolds number of 150
AU - Zhu, Hongjun
AU - Zhong, Jiawen
AU - Shao, Ze
AU - Zhou, Tongming
AU - Alam, Md Mahbub
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/11
Y1 - 2024/11
N2 - The flow-induced vibration (FIV) of three tandem circular cylinders is numerically investigated using OpenFOAM based on the finite-volume method. The one-degree-of-freedom dynamic response of three tandem circular cylinders with a spacing ratio ranging from 2 to 6 is analysed at a low Reynolds number of 150 over a reduced velocity range of 2–16. The results of hydrodynamic coefficients, response amplitude, vibration frequency, wake structure, and decomposition of vorticity are discussed in this study. Although the streamwise spacing ratio is constant, the dynamic evolution of the crossing angles among three cylinders leads to the switching of wake interference mode. The two-layered vortices are merged into secondary vortices in the far wake, and the energy of secondary vortices is higher than the two-layered vortices. The upstream cylinder exhibits a similar trend as an isolated cylinder in terms of the variations of hydrodynamic coefficients and response amplitude with the reduced velocity. In contrast, the middle and downstream cylinders experience a significantly lower drag due to the shielding effect. Particularly at small spacing ratios, the drag on the middle cylinder becomes negative. At the same time, the lift coefficient and response amplitude are higher than those of an isolated cylinder at high reduced velocities. The three tandem cylinders intermittently form a triangular configuration during the oscillation.
AB - The flow-induced vibration (FIV) of three tandem circular cylinders is numerically investigated using OpenFOAM based on the finite-volume method. The one-degree-of-freedom dynamic response of three tandem circular cylinders with a spacing ratio ranging from 2 to 6 is analysed at a low Reynolds number of 150 over a reduced velocity range of 2–16. The results of hydrodynamic coefficients, response amplitude, vibration frequency, wake structure, and decomposition of vorticity are discussed in this study. Although the streamwise spacing ratio is constant, the dynamic evolution of the crossing angles among three cylinders leads to the switching of wake interference mode. The two-layered vortices are merged into secondary vortices in the far wake, and the energy of secondary vortices is higher than the two-layered vortices. The upstream cylinder exhibits a similar trend as an isolated cylinder in terms of the variations of hydrodynamic coefficients and response amplitude with the reduced velocity. In contrast, the middle and downstream cylinders experience a significantly lower drag due to the shielding effect. Particularly at small spacing ratios, the drag on the middle cylinder becomes negative. At the same time, the lift coefficient and response amplitude are higher than those of an isolated cylinder at high reduced velocities. The three tandem cylinders intermittently form a triangular configuration during the oscillation.
KW - Flow-induced vibration
KW - One degree-of-freedom
KW - Tandem cylinders
KW - Wake interference
UR - http://www.scopus.com/inward/record.url?scp=85206196841&partnerID=8YFLogxK
U2 - 10.1016/j.jfluidstructs.2024.104204
DO - 10.1016/j.jfluidstructs.2024.104204
M3 - Article
AN - SCOPUS:85206196841
SN - 0889-9746
VL - 130
JO - Journal of Fluids and Structures
JF - Journal of Fluids and Structures
M1 - 104204
ER -