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Technical Note

Numerical Analysis of Drag Force Acting on 2D Cylinder Immersed in Accelerated Flow

by 1,2, 1,* and 3
1
School of Civil Engineering, Chungbuk National University, Cheongju 28644, Korea
2
Naval Systems R&D Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd., Geoje 53302, Korea
3
Department of Disaster Prevention Engineering, Chungbuk National University, Cheongju 28644, Korea
*
Author to whom correspondence should be addressed.
Water 2020, 12(6), 1790; https://doi.org/10.3390/w12061790
Received: 14 May 2020 / Revised: 12 June 2020 / Accepted: 16 June 2020 / Published: 23 June 2020
(This article belongs to the Special Issue Industrial and Environmental Fluid Mechanics)
In this study, the drag exerted by an accelerating fluid on a stationary 2D circular cylinder is numerically investigated using Fluent 19.2 based on the finite-volume method. The SST k–ω model is chosen as the turbulence model because of its superiority in treating the viscous near-wall region. The results are compared to literature, and the numerical methods are validated. The acceleration of the inflow is analyzed for the range of 0.0981–9.81 m/s2, and the drag for each acceleration is compared. Additionally, the effect of the initial velocity on the drag acting on the circular cylinder is investigated at two initial velocities. As a result, a supercritical region, typically found under steady state conditions, is observed. Furthermore, vortex shedding is observed at a high initial velocity. This flow characteristic is explained via comparison with respect to the recirculation length and separation angle. View Full-Text
Keywords: sudden start; bluff body; 2D circular cylinder; accelerated flow; CFD sudden start; bluff body; 2D circular cylinder; accelerated flow; CFD
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MDPI and ACS Style

Son, H.A.; Lee, S.; Lee, J. Numerical Analysis of Drag Force Acting on 2D Cylinder Immersed in Accelerated Flow. Water 2020, 12, 1790. https://doi.org/10.3390/w12061790

AMA Style

Son HA, Lee S, Lee J. Numerical Analysis of Drag Force Acting on 2D Cylinder Immersed in Accelerated Flow. Water. 2020; 12(6):1790. https://doi.org/10.3390/w12061790

Chicago/Turabian Style

Son, Hyun A., Sungsu Lee, and Jooyong Lee. 2020. "Numerical Analysis of Drag Force Acting on 2D Cylinder Immersed in Accelerated Flow" Water 12, no. 6: 1790. https://doi.org/10.3390/w12061790

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