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

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...

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Bibliographic Details
Published in:Water (Basel) 2020-06, Vol.12 (6), p.1790
Main Authors: Son, Hyun A., Lee, Sungsu, Lee, Jooyong
Format: Article
Language:English
Subjects:
Accelerated flow
Acceleration
Boundary conditions
Circular cylinders
Computational fluid dynamics
Cylinders
Experiments
Finite volume method
Flow characteristics
Fluid flow
Kinematics
Mathematical models
Mechanical properties
Numerical analysis
Numerical methods
Reynolds number
Shear stress
Studies
Turbulence
Turbulence models
Velocity
Viscosity
Vortex shedding
Vortices
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Summary: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.
ISSN:2073-4441
2073-4441
DOI:10.3390/w12061790