M. Manna

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...