Analysis of flow characteristics for different shapes of cylinder at lower subcritical regime

The present work attempted to analyze the flow structures behind a circular cylinder of different shapes at the subcritical flow regime using unsteady Reynolds averaged equation. Shape ratio variation, circular to an elliptical shape, has been obtained by changing its major to minor axis ratio at Re...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-08, Vol.912 (4), p.42068
Main Authors: Soundararaju, Ponsankar, Kumar, Pankaj
Format: Article
Language:English
Subjects:
Aerodynamic coefficients
Circular cylinders
Drag coefficients
Flow characteristics
Fluid dynamics
Fluid flow
Frequency analysis
Frequency spectrum
Resonant frequencies
Reynolds number
Spectrum analysis
Strouhal number
Subcritical flow
Vorticity
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Summary:The present work attempted to analyze the flow structures behind a circular cylinder of different shapes at the subcritical flow regime using unsteady Reynolds averaged equation. Shape ratio variation, circular to an elliptical shape, has been obtained by changing its major to minor axis ratio at Reynolds numbers 200 and 4000. Various flow parameters like drag coefficient, lift coefficient, Strouhal number along with pressure and velocity flow field are analyzed. The primary bulk quantities indicate that the flow characteristics are highly dependable for circular cylinders' shape ratio (SR). The frequency obtained from the vorticity magnitude resembles the natural frequency observed by force coefficients. The formation length increases with increase in Reynolds number, as obtained through the frequency spectrum analysis in the wake region, is highly depends on the shape of the bluff body.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/912/4/042068