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Vortex shedding and resistance in harmonic flow about smooth and rough circular cylinders at high reynolds numbers
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TLDR
In this paper, 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 number up to 150, and relative roughness from 0. 002 to 0.02 were determined through the use of the Fourier analysis and the least squares method.Abstract:
: 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.read more
Citations
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A critical review of the intrinsic nature of vortex-induced vibrations
TL;DR: A comprehensive review of the progress made during the past two decades on vortex-induced vibration (VIV) of mostly circular cylindrical structures subjected to steady uniform flow is presented in this article.
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Force on a circular cylinder in viscous oscillatory flow at low Keulegan—Carpenter numbers
TL;DR: In this article, the in-line force coefficients for circular cylinders in planar oscillatory flows of small amplitude were compared with the theoretical predictions of Stokes (1851) and Wang (1968).
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Low-Reynolds-number flow around an oscillating circular cylinder at low Keulegan–Carpenter numbers
TL;DR: In this article, the authors performed time-averaged LDA measurements and time-resolved numerical flow predictions to investigate the laminar flow induced by the harmonic in-line oscillation of a circular cylinder in water at rest.
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Forces on cylinders in viscous oscillatory flow at low Keulegan-Carpenter numbers
TL;DR: In this article, a comparison between theory and experiment for the in-line forces on cylinders of general cross-section in planar oscillatory flows of small amplitude is presented, where the boundary-layer contribution due to both skin friction and displacement effects is calculated to first order in the Stokes parameter β−½.
References
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The Instability of Liquid Surfaces when Accelerated in a Direction Perpendicular to their Planes. I
TL;DR: In this article, it was shown that when two superposed fluids of different densities are accelerated in a direction perpendicular to their interface, this surface is stable or unstable according to whether the acceleration is directed from the heavier to the lighter fluid or vice versa.
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The Force Exerted by Surface Waves on Piles
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The stability of the plane free surface of a liquid in vertical periodic motion
Thomas Brooke Benjamin,F. Ursell +1 more
TL;DR: In this article, the stability of the plane free surface is investigated theoretically when the vessel is a vertical cylinder with a horizontal base, and the liquid is an ideal frictionless fluid making a constant angle of contact of 90° with the walls of the vessel.
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Distribution of local pressure and skin friction around a circular cylinder in cross-flow up to Re = 5 × 10 6
TL;DR: In this paper, the authors measured the local pressure and skin friction distribution around a cylinder and calculated the total drag, the pressure drag and the friction drag, which can be used to define three states of the flow: the subcritical flow, where the boundary layer separates laminarly; the critical flow, in which a separation bubble, followed by a turbulent reattachment, occurs; and the supercritical flow where an immediate transition from the laminars to the turbulent boundary layer is observed at a critical distance from the stagnation point.
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Forces on cylinders and plates in an oscillating fluid
G.H. Keulegan,L.H. Carpenter +1 more