Showing papers on "Vortex-induced vibration published in 1979"
TL;DR: In this paper, a discrete vortex model based on potential flow and boundary-layer interaction, rediscretization of shear layers, and circulation dissipation is developed to determine the characteristics of an impulsively started flow about a circular cylinder.
Abstract: A discrete vortex model based on potential flow and boundary-layer interaction, rediscretization of shear layers, and circulation dissipation is developed to determine the characteristics of an impulsively started flow about a circular cylinder. The evolution of the flow from the start to very large times, lift and drag forces, Strouhal number, oscillations of the separation and stagnation points, and the vortex-street characteristics are calculated and compared with experiments. b CD CL Cpb c D fv h / j m N n q Re St s ds t At U u v w z F 7 6 X v p Nomenclature = longitudinal spacing of vortices = drag coefficient = lift coefficient = base pressure coefficient = radius of the cylinder - diameter of the cylinder ,D = 2c = vortex shedding frequency = transverse spacing of vortices = an index = distance to nascent vortex from cylinder = number of vortices on a sheet = an index = total velocity at a point = Reynolds number, UD/v = Strouhal number, fvD/ U = distance along a sheet = point vortex spacing = time or Ut/c for U= 1 and c = 1 - numerical step size = velocity of the ambient flow = x component of velocity -y component of velocity = complex velocity potential = complex variable = circulation = circulation per unit length = angle measured from ( - c,0) = dissipation parameter = kinematic viscosity of fluid = density of fluid = vorticity
118 citations
9 citations
01 Mar 1979
3 citations
TL;DR: In this article, the authors focus on the case where the body is the interior of a simple closed curve situated in the plane and the flow takes place in the exterior domaiii E of r.
Abstract: One of the basic problems of fluid dynamics is to describe what happens when a fluid flows around a solid body. Here the discussion will be limited to the case where the body is the interior of a simple closed curve r situated in the plane and the flow takes place in the exterior domaiii E of r. Euler’s method of describing the kinematics of such a flow is to specify vectors V ( y . t ) denoting the velocity of the particle of fluid that is a t the point y of E at the time t . The vector field Y must satisfy the condition
2 citations