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R. Verzicco

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Open access Oct 2026

Flow in a narrow-gap annulus: drag reduction by inner cylinder azimuthal oscillation

Abstract Content of image described in text. The axial flow through a thin gap between two concentric cylinders is investigated using direct numerical simulation (DNS) of the Navier–Stokes equations. It is shown that by imposing a stationary, harmonic, azimuthal velocity at the inner cylinder wall, drag reduction is al...

M. Manna, A. Vacca, R. Verzicco · 0 citations

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