Comparative flow visualization for steady and unsteady motions of a disk through a fluid

Abstract

FIG. 1. Comparison of flow past (a′) a stationary disk and (b′) a disk undergoing in-line oscillations. (a) Pathline visualization using microparticles in water illuminated by a laser sheet: A stationary disk induces a relatively quiescent wake separated from a fast outer flow. (b) An oscillating disk, here captured in upstroke, emits successive vortex… (More)

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