Hydrodynamic forces on a partially submerged cylinder at high Reynolds number in a steady flow

Ren, Haojie; Yang, Xu; Zhang, Mengmeng; Deng, Shi; Li, Shuai; Fu, Shixiao; Sun, Hao

doi:10.1016/j.apor.2019.04.025

Cited by 21 publications

(4 citation statements)

References 13 publications

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“…They also proposed an analytical model to predict the air entrapment rate and showed satisfactory matching with the findings of experiments. Furthermore, Ren et al carried out experiments on a steady flow past a partly immersed static drum and determined the critical value of the Froude number to differentiate “overtopping” and “nonovertopping” conditions. Most recently, Panda et al attempted numerically to describe the gas entrainment dynamics and wrapped film around a partly immersed (50% submergence ratio) drum across different gas–liquid interfaces with an additional effect of steady flow of air over the free surface.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Analytical Prediction on the Development of Entrained Air Filament Caused by the Combined Effect of Rotational Field and Free Stream Flow

Panda

Rana

2022

Ind. Eng. Chem. Res.

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In this study, an attempt has been made to characterize the pattern of entrained air filament inside a liquid bath of high viscosity by employing a fully submerged horizontal rotating solid roller where the lighter phase is allowed to flow uniformly above the bath. The influence of roller rotational speed (ω), depth of submergence (h/D), strength of the crossflow (Re flow ), and fluid pair (Mo) on the entrainment profile has been established numerically to report the physical insights. An open-source Gerris solver has been employed to perform this computational work. We have also described the transient dynamics of the cusp tip for various input pertinent parameters. In addition, both departure of bubbles at the tip of the steady configured cusp and the entrainment rate are predicted for different gas−liquid pairs. Interfacial configurations are also obtained as a consequence of the effect of gravitational pull. Lastly, an analytical analysis predicted successfully the obtaining of the structure of the cusp, and the predictions are quite satisfactory compared to present numerical data.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Analytical Prediction on the Development of Entrained Air Filament Caused by the Combined Effect of Rotational Field and Free Stream Flow

Panda

Rana

2022

Ind. Eng. Chem. Res.

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“…Additionally, there is a carriage that is used to tow objects through the tank with various speed. The experimental setup can be seen in Figure 1, which is bears similarity to other studies on hydrodynamic loads on partially submerged objects [8,9]. The tested model is fixed at a stainless square section hollow profile with section length of 50 mm and thickness of 4 mm.…”

Section: Methodsmentioning

confidence: 99%

“…They provide resistance coefficients for a vertical tube extending 2 diameters into the water volume. Ren et al [9] focused on hydrodynamic forces on partially submerged horizontal cylinders with Reynolds numbers ranging from 5 × 10 4 to 9 × 10 5 . Their experimental results showed that when the cylinder protrudes the surface, the drag crisis did not occur as for completely submerged cylinders.…”

Section: Introductionmentioning

confidence: 99%

CFD Estimation of a Resistance Coefficient for an Egg-Shaped Geometric Dome

et al. 2022

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In aquaculture, new production technologies are under development and testing. One promising type of technology is the closed floating cage. Egget® is one of these newly developed technologies, which is egg-shaped and vertically floating. One of the challenges is to determine hydrodynamic loads. Therefore, this study focuses on estimating the resistance and the resistance coefficient for steady flow with various velocities and Reynolds numbers on a scaled model. It includes simulations using Computational Fluid Dynamics (CFD) for two depths and experiments in the MarinLab at Western Norway University of Applied Sciences (HVL). As the cage is partially submerged, the simulations are performed using the Volume of Fluid (VOF) technique for modeling free surface flow. The comparison of experimental and simulation results show good agreement.

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“…The force coefficient relations under these above-considered parameters were explored and could be used in the structural design of submerged pipelines. Recently, Ren et al [11] estimated the hydrodynamic loads on partially submerged cylinders at a high Re number (i.e., Re = 9 × 10 5 ). The authors explored that free surface effects result to a significant mean downward lift force in the crossflow direction.…”

Section: Introductionmentioning

confidence: 99%

On the behavior of nonlinear hydrodynamic coefficients of a submerged cylinder beneath the water surface

Tien

Phan

et al. 2021

Vietnam J. Mech.

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This study aims at numerically exploring the behavior of flow fields and nonlinear hydrodynamic coefficients of a horizontal cylinder beneath the free surface flow considering the effects of nonlinear surface waves and various cylinder shapes. The computational model is based on two-dimensional incompressible Navier-Stokes solvers along with the treatment of the free surface flow using the volume of fluid method. The effect of the turbulent flow is also considered by using the shear stress transport turbulence model. The simulation result of a benchmark case study of the submerged cylinder is first validated with available experiment data, where a mesh convergence analysis is also performed. Afterward, the flow fields and hydrodynamic force coefficients around the cylinder surface are analyzed, and the influences of various cylinder shapes and Reynolds numbers on the hydrodynamic coefficients are investigated. A state diagram representing the hydrodynamic behavior including stable and unstable stages is finally proposed; this is an important criterion for the practice design of submerged civil structures under the free surface flow.

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Hydrodynamic forces on a partially submerged cylinder at high Reynolds number in a steady flow

Cited by 21 publications

References 13 publications

Numerical Simulation and Analytical Prediction on the Development of Entrained Air Filament Caused by the Combined Effect of Rotational Field and Free Stream Flow

Numerical Simulation and Analytical Prediction on the Development of Entrained Air Filament Caused by the Combined Effect of Rotational Field and Free Stream Flow

CFD Estimation of a Resistance Coefficient for an Egg-Shaped Geometric Dome

On the behavior of nonlinear hydrodynamic coefficients of a submerged cylinder beneath the water surface

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