Journal ArticleDOI
Experiments on the flow past a circular cylinder at low Reynolds numbers
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In this article, the authors describe measurements of the drag on circular cylinders, made by observing the bending of quartz fibres, in a stream with the Reynolds number range 0·5-100.Abstract:
Part I describes measurements of the drag on circular cylinders, made by observing the bending of quartz fibres, in a stream with the Reynolds number range 0·5-100. Comparisons are made with other experimental values (which cover only the upper part of this range) and with the various theoretical calculations.Part II advances experimental evidence for there being a transition in the mode of the vortex street in the wake of a cylinder at a Reynolds number around 90. Investigations of the nature of this transition and the differences between the flows on either side of it are described. The interpretation that the change is between a vortex street originating in the wake and one originating in the immediate vicinity of the cylinder is suggested.read more
Citations
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Journal ArticleDOI
Oblique and Parallel Modes of Vortex Shedding in the Wake of a Circular Cylinder at Low Reynolds Numbers
TL;DR: In this article, it was shown that the Strouhal discontinuity is not due to any of the previously proposed mechanisms, but instead is caused by a transition from one oblique shedding mode to another oblique mode.
Journal ArticleDOI
Numerical solutions for steady flow past a circular cylinder at Reynolds numbers up to 100
S. C. R. Dennis,Gau-Zu Chang +1 more
TL;DR: In this article, a finite-difference solution of the equations of motion for steady incompressible flow around a circular cylinder has been obtained for a range of Reynolds numbers from R = 5 to R = 100, where the wake length increases linearly with R over the whole range from the value, just below R = 7, at which it first appears.
Journal ArticleDOI
Regular Article: An Accurate Cartesian Grid Method for Viscous Incompressible Flows with Complex Immersed Boundaries
TL;DR: A Cartesian grid method has been developed for simulating two-dimensional unsteady, viscous, incompressible flows with complex immersed boundaries and the ability of the solver to simulate flows with very complicated immersed boundaries is demonstrated.
Journal ArticleDOI
Application of generalized differential quadrature to solve two-dimensional incompressible navier-stokes equations
Chang Shu,Bryan E. Richards +1 more
TL;DR: In this paper, a global method of generalised differential quadrature is applied to solve the two-dimensional incompressible Navier-Stokes equations in the vorticity-stream-function formulation.
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Numerical study and physical analysis of the pressure and velocity fields in the near wake of a circular cylinder
M. Braza,P. Chassaing,H. Ha Minh +2 more
TL;DR: In this paper, the authors investigated the dynamic characteristics of the pressure and velocity fields of the unsteady incompressible laminar wake behind a circular cylinder, and the initiation mechanism for vortex shedding and evaluation of the body forces are presented for Reynolds-number values of 100, 200 and 1000.
References
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Expansions at small Reynolds numbers for the flow past a sphere and a circular cylinder
Ian Proudman,J. R. A. Pearson +1 more
TL;DR: In this paper, the Navier-Stokes equation is replaced by a set of differential equations for the coefficients ψn and Ψn, but only one set of physical boundary conditions is applicable to each expansion (the no-slip conditions for the Stokes expansion, and the uniform-stream condition for the Oseen expansion).
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The flow past circular cylinders at low speeds
TL;DR: In this paper, the authors deal mainly with calculations and experiments on the flow past circular cylinders, but the arithmetical methods of solution of the equations of steady viscous flow proposed and used in Section I, are applicable to other equations.
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Relaxation methods applied to determine the motion, in two dimensions, of a viscous fluid past a fixed cylinder
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Experimental Investigation of the Wakes behind Cylinders and Plates at Low Reynolds Numbers
TL;DR: In the case of a flat plate parallel to the flow, the wake begins to oscillate sinusoidally some distance downstream at about R =700 (R is U l /ν, where l is the length of the plate) as mentioned in this paper.
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Hot-Wire Investigation of the Wake behind Cylinders at Low Reynolds Numbers
TL;DR: In this paper, a hot-wire technique has been used to measure the regular vortex street pattern behind a cylinder at low Reynolds number, and the important points resulting from the investigation are that the critical Reynolds number at which vortices are shed is 40, and in the range of Reynolds numbers investigated the vortex are not shed directly from the cylinder but appear some distance downstream as an instability of the laminar wake.