Two degrees of freedom flow-induced vibration and heat transfer of an isothermal cylinder

Yang, Zuomei; Ding, Lin; Zhang, Li; Yang, Lin; He, Haoyu

doi:10.1016/j.ijheatmasstransfer.2020.119766

Cited by 43 publications

(16 citation statements)

References 49 publications

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“…Here, we discuss contributions and limitations of some papers published in literature and try to explain what is new in the ongoing exploration. Yang et al [44] used CFD based Fluent software and user-defined function to expose flow vibration and timedependent flow configuration through a circular cylinder. Khanafer et al [45] conducted Nk5000 code to explore the effect in streamlines and isotherms with changing parameters and showed that the rotational speed expressively enhances overall heat throughout the fluid than other parameters such as Ri and Re number.…”

Section: Validation Of the Studymentioning

confidence: 99%

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

et al. 2022

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In recent years, the analysis of flow disposition in a curved duct (CD) has greatly attracted researchers because it is broadly used in engineering devices. In the present paper, unsteady flow characteristics of energy transfer (HT) in a rotating curved square duct (CSD) have been presented with the aid of spectral method. The key purpose of this study is to explore rotational effects and heat transfer (HT) of the duct. For this purpose, time-evolution calculation is performed over the Taylor number (-1500 ≤ Tr ≤ 1500) and other parameters are fixed; e.g., Dean number (Dn = 1000), Curvature (δ = 0.015) and Prandtl number (Pr = 7.0, for water). Firstly, time-dependent behavior is accomplished for both clockwise and anticlockwise rotations. It is found that the flow instabilities are certainly governed by the change of Tr that has been justified by sketching phase spaces (PS). To observe the flow features, velocities including axial flow (AF), secondary flow (SF) and temperature profiles are disclosed for both rotations; and it is elucidated that 2- to 6-vortex solutions are generated for physically realizable solutions. Axial flow (AF) shows that two maximum-velocity regimes are produced which induces secondary flow (SF), and, consequently, a strong bonding between the AF and SF has been built up. It is observed that as the rotation is increased, the fluid is mixed considerably which boosts HT in the fluid. Finally, an assessment between the numerical and experimental data has been given, and a good agreement is observed.

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Section: Validation Of the Studymentioning

confidence: 99%

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

et al. 2022

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“…These cylindrical parts may experience flow-induced vibration (FIV) due to the exertion of oscillating aero-hydrodynamic forces (Khan et al , 2018). These structural movements have been shown to affect convective heat transfer, especially in the synchronization (lock-in) zone where the magnitude of the oscillations increases due to the correlation between the natural frequency of the oscillator and the vortex shedding frequency (Izadpanah et al , 2018; Khan et al , 2020; Yang et al , 2020; Rabiee and Farahani, 2020; Sun et al , 2021; Su et al , 2019; Mosaferi et al , 2022; Ding et al , 2022; Ebrahimi et al , 2021; Barati et al , 2022; Zou et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

Heat transfer characteristics in turbulent FIV of three circular cylinders with different isosceles-triangle arrangements

Esmaeili

Rabiee

2023

HFF

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Purpose This study aims to numerically explore the heat transfer characteristics in turbulent two-degree-of-freedom vortex-induced vibrations (VIVs) of three elastically mounted circular cylinders. Design/methodology/approach The cylinders are at the vertices of an isosceles triangle with a base and height that are the same. The finite volume technique is used to calculate the Reynolds-averaged governing equations, whereas the structural dynamics equations are solved using the explicit integration method. Simulations are performed for three different configurations, constant mass ratio and natural frequency, as well as distinct reduced velocity values. Findings As a numerical challenge, the super upper branch observed in the experiment is well-captured by the current numerical simulations. According to the computation findings, the vortex-shedding around the cylinders increases flow mixing and turbulence, hence enhancing heat transfer. At most reduced velocities, the Nusselt number of downstream cylinders is greater than that of upstream cylinders due to the impact of wake-induced vibration, and the maximum heat transfer improvement of these cylinders is 21% (at Ur = 16), 23% (at Ur = 5) and 20% (at Ur = 15) in the first, second and third configurations, respectively. Originality/value The main novelty of this study is inspecting the thermal behavior and turbulent flow–induced vibration of three circular cylinders in the triangular arrangement.

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“…Baleanu et al [53] analyzed the magnetic field and heat transfer effect among the SWC and MWC nanotubes. Yang et al [54] employed defined-function and FLUENT software to enumerate the forced convective heat transfer through a vibrated cylinder. They further traced out the particle trajectories when the fluid particle is thermally insulated.…”

Section: Introductionmentioning

confidence: 99%

A computational modeling on transient heat and fluid flow through a curved duct of large aspect ratio with centrifugal instability

et al. 2021

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Due to remarkable applications of the curved ducts in engineering fields, scientists have paid much attention to invent new characteristics of curved-duct flow in mechanical systems. In the ongoing study, a computational modeling of fluid flow and energy distribution through a curved rectangular duct of large aspect ratio is presented. Governing equations are enumerated by using a spectral-based numerical technique together with the function expansion and collocation method. The main purpose of the paper is to analyze the effect of centrifugal force in the flow transition as well as heat transfer in the fluid. The investigations are performed for the aspect ratio, Ar = 4; the curvature ratio, $$\delta = 0.5$$ δ = 0.5 ; the Grashof number, $${\text{Gr}} = 1000$$ Gr = 1000 ; and varying the Dean number, $$0 < {\text{Dn}} \le 1000.$$ 0 < Dn ≤ 1000 . It is found that various types of flow regimes including steady-state and irregular oscillations occur as Dn is increased. To well understand the characteristics of the flow phase spaces and power spectrum of the solutions are performed. Next, pattern variations of axial and secondary flow velocity with isotherms are illustrated for different Dn’s. It is revealed that the flow velocity and the isotherms are significantly influenced by the duct curvature and the aspect ratio. Convective heat transfer and temperature gradients are calculated which explores that the fluids are diversified due to centrifugal instability, and as a consequence the overall heat transfer is enhanced significantly in the curved duct.

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Two degrees of freedom flow-induced vibration and heat transfer of an isothermal cylinder

Cited by 43 publications

References 49 publications

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

Heat transfer characteristics in turbulent FIV of three circular cylinders with different isosceles-triangle arrangements

A computational modeling on transient heat and fluid flow through a curved duct of large aspect ratio with centrifugal instability

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