This paper examines the ability of two-dimensional CFD models to predict flow downstream of a cylinder in uniform flow. PIV measurements of the flow-field downstream of the cylinder in uniform flow are first presented. “Slices” of the flow at several locations along the cylinder are compared to show the variation of the flow in the cross-stream direction. Then the PIV flow is compared with RANS and LES simulations of the flow. Hydrodynamic coefficients and velocities are compared. In a general sense, two-dimensional CFD can give a functional approximation of the unsteady flow field downstream of the cylinder.

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