Computational fluid dynamics analysis of low Reynolds number flow around stationary and oscillating cylinders

摘要

A computational method is shown for a 2D incompressible unsteady flow around a stationary or an oscillating cylinder placed in a uniform stream at low Reynolds number (Re=10-190). The flow around a circular cylinder in orbital motion (the superposition of two oscillations) was computed. We investigated the effect of Reynolds number and amplitude of ellipticity on the time-mean and root-mean-square values of the lift, drag, and base pressure coefficients. Each of the 5 cases shown involves a transition to lock-in in the domain of investigation.