Numerical simulation of the vortical flow around an oscillating circular cylinder

Abstract

The phenomena of vortex shedding around a cylinder oscillating harmonically in a fluid at rest are investigated by a two-dimensional numerical simulation of the Navier-Stokes equations. The simulation is based on a voracity-velocity integro-differential formulation dealing with voracity, velocity and pressure variables. Three combinations of Reynolds number(Re) and Keulegan-Carpenter mmber(KC) were taken to investigate the associated vortex development around the cylinder in the different flow regimes. Drag and lift forces are computed to describe their dominant frequency modulation which is related to the vortex shedding and to the harmonic motion of the cylinder. Copyright ？ 2005 by The International Society of Offshore and Polar Engineers.