Flow-induced vibration control of a circular cylinder by using flexible and rigid splitter plates

Passive bionic motion of a flexible film in the wake of a circular cylinder: chaos and periodicity, flow–structure interactions and energy evolution

“…The majority of investigations are predominantly performed by two-dimensional numerical simulations at pretty low Reynolds numbers (even at Reynolds numbers involving laminar vortex shedding), such as Re = 100 in Lee & You (2013), Re = 150 in Wu et al (2014), Re = 100 and 200 in Kundu et al (2017), Re = 150 in Sahu et al (2019), Re = 80 in Pfister & Marquet (2020), Re = 150 in Furquan & Mittal (2021) and Re = 100 in Mao et al (2022), to name but a few, which are significantly smaller than the Reynolds number encountered by real-world flag flapping or fish swimming. Several noteworthy experiments with Re ∼ O(10 3 ) − O(10 5 ), including studies by Shukla et al (2013), Sharma & Dutta (2020, Deng et al (2021) and Cui et al (2022), present intriguing phenomena, but which are divergent from the results of numerical simulations. We venture to point out that most of the related analyses in these experimental studies are only confined to rudimentary descriptions of experimental phenomena lacking profound insights into the mechanism.…”

“…(2021) and Cui et al. (2022), present intriguing phenomena, but which are divergent from the results of numerical simulations. We venture to point out that most of the related analyses in these experimental studies are only confined to rudimentary descriptions of experimental phenomena lacking profound insights into the mechanism.…”

“…A series of investigations, encompassing experiments, numerical simulations and theoretical analyses, have been conducted to dig out the characteristics and mechanisms underlying this flow–structure interaction model. It has been revealed that an appropriately sized flexible film contributes to the reduction of drag (Lee & You 2013; Sharma & Dutta 2021; Mao, Liu & Sung 2022), noise (Duan & Wang 2021) and vibration (Sahu, Furquan & Mittal 2019; Cui, Feng & Hu 2022) associated with flow over a circular cylinder or similar bluff bodies. However, a substantial number of fundamental issues related to this model are seemingly long shunned and thus demand urgent solution.…”

Flapping dynamics of a flexible membrane attached to the leading edge of a forward-facing step

“…FM is also widely attached to the leeward surface of a twodimensional (2D) cylindrical structure to suppress its aero/hydrodynamic forces and vortex-induced vibration (VIV). Cui et al (2022) found flexible splitter plates are more effective than rigid ones in suppressing the VIV of a circular cylinder. They suggested the maximum VIV amplitude can be suppressed by about 91% for the case with l=D ¼ 3, where D is the diameter of circular cylinders.…”

“…The flexible structure as a self-adaptive control device has been successfully utilized in flow control (Niu and Hu, 2011;Tan et al, 2021;Ma et al, 2022;Duan and Wang, 2021;Cui et al, 2022;Wang et al, 2022;. When facing unfavorable conditions, the flexible coverts on birds' wings may pop up and flap to prevent stalls caused by flow separation (Carruthers et al, 2007).…”