An Experimental Investigation on the Flow Around a Circular Cylinder in the First Critical Subregion
An Experimental Investigation on the Flow Around a Circular Cylinder in the First Critical Subregion

Author: Hyun Jin Kim

Publisher:

Published: 1986

Total Pages: 506

ISBN-13:

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An experimental investigation has been carried out on the flow transitions around a smooth circular cylinder in the initial stage of the critical Reynolds number region, where drag coefficient starts to decrease. In this Reynolds number region, intermitent reattachment of the separated boundary layer was found, while only initial separation position excursion was observed in the subcritical region. Large spanwise variations in the surface pressure and wake velocity observed in the first critical subregion were associated with local wake width pulsations caused by spanwise phase variations in the unsteady flow reattachment.

Flow Around Circular Cylinders
Flow Around Circular Cylinders

Author: M.M. Zdravkovich

Publisher: Oxford University Press

Published: 1997

Total Pages: 628

ISBN-13: 9780198565611

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This text offers an authoritative compilation of experimental data, theoretical models, and computer simulations which will provide the reader with a comprehensive survey of research work on the phenomenon of flow around circular cylinders.

Vortex Shedding and Resistance in Harmonic Flow about Smooth and Rough Circular Cylinders at High Reynolds Numbers
Vortex Shedding and Resistance in Harmonic Flow about Smooth and Rough Circular Cylinders at High Reynolds Numbers

Author: Turgut Sarpkaya

Publisher:

Published: 1976

Total Pages: 194

ISBN-13:

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This report presents the results on an extensive experimental investigation of the in-line and transverse forces acting on smooth and rough circular cylinders placed in oscillatory water flow at Reynolds numbers up to 700,000, Keulegan-Carpenter numbers up to 150, and relative roughnesses from 0.002 to 0.02. The drag and inertia coefficients have been determined through the use of the Fourier analysis and the least-squares method. The transverse force (lift) has been analyzed in terms of its maximum, semi-peak-to-peak, and root-mean-square values. In addition, the frequency of vortex shedding and the Strouhal number have been determined.