Primary instability, sensitivity and active control of flow past two tandem circular cylinders

Z Liu, L Zhou, H Tang, Z Wang, F Zhao, X Ji, H Zhang - Ocean Engineering, 2024 - Elsevier
The tandem two-cylinder configuration is frequently employed in engineering structures. Its
fluid force and vortex shedding are significantly greater than those of widely studied single …

Laminar flow over a rectangular cylinder experiencing torsional flutter: Dynamic response, forces and coherence modes

Q Zhu, L Zhou, J Wen, T Liu, J Zhang, H Tang… - Physics of …, 2023 - pubs.aip.org
This study investigates the flutter response of a rectangular cylinder model with an aspect
ratio of 5 at the Reynolds number Re= 100 via direct numerical simulation. The effects of two …

Vortex-induced vibrations of tandem diamond cylinders: A novel lock-in behavior

D Kumar, K Sourav - International Journal of Mechanical Sciences, 2023 - Elsevier
This paper presents a comprehensive numerical investigation of the undamped,
simultaneous in-line, and transverse flow-induced vibrations of two identical diamond …

Flow pattern-and forces-susceptibility to small attack angles for a rectangular cylinder

L Zhou, Q Zhu, KT Tse, X Ning, Y Ai, H Zhang - Ocean Engineering, 2024 - Elsevier
This study employs numerical simulation to investigate the two-dimensional flow of a
rectangular cylinder with an aspect ratio of 5, under various flow attack angles (α) and …

[HTML][HTML] Flow structure and dynamics behind cylinder arrays at Reynolds number∼ 100

M Sharifi Ghazijahani, C Cierpka - Physics of Fluids, 2023 - pubs.aip.org
The flow behind nine different arrays of cylinders is experimentally investigated via Particle
Image Velocimetry (PIV) at a Reynolds number of Re∼ 100 based on the diameter of the …

Effect of a rotatable water-drop plate on vortex-induced vibration of cylinder

B Li, Y Zhong, B Zhang, R Zhang, Y Liu, J Lu, C Li - Ocean Engineering, 2024 - Elsevier
To suppress the Vortex-induced vibration (VIV) response, a cylinder with a rotatable water-
drop plate is investigated. The influence of the side curves (concave, linear, convex) of the …

Numerical explorations of the vortex-induced vibration of a streamlined box girder with water-filled barriers

X Wang, F Xu, Z Zhang, Y Wang, M Zhang - Journal of Wind Engineering …, 2023 - Elsevier
The present study aims to investigate the charactefristics of vortex-induced vibrations (VIVs)
of a streamlined box girder equipped with water-filled barriers (WFBs) through two …

Mode interpretation and force prediction surrogate model of flow past twin cylinders via machine learning integrated with high-order dynamic mode decomposition

T Liu, L Zhou, H Tang, H Zhang - Physics of Fluids, 2023 - pubs.aip.org
Understanding and modeling the flow field and force development over time for flow past
twin tandem cylinders can promote insight into underlying physical laws and efficient …

Mitigating the lift of a circular cylinder in wake flow using deep reinforcement learning guided self-rotation

F Zhao, Y Zhou, F Ren, H Tang, Z Wang - Ocean Engineering, 2024 - Elsevier
This study applies deep reinforcement learning (DRL) to reduce lift forces on a circular
object in the wake of another. The proximal policy optimization (PPO) method is utilized to …

Effect of aspect ratio on the aerodynamic performance and correlation of square section building exposed to twisted wind profile

L Zhou, KT Tse, G Hu, Z Guo - The Structural Design of Tall and …, 2023 - Wiley Online Library
This study investigates the aerodynamic performance of three square‐section buildings with
different aspect ratio (AR= 1: 1, 1: 4, and 1: 6) exposed to twisted wind profile (TWP) by …