Numerical Studies of a Viscous Liquid past a Circular Cylinder

Abstract

In the study of the steady two‐dimensional flows past a circular cylinder in an infinite extent, the two sets of boundary conditions at infinity for the perturbed stream function and the vorticity, which are generally used, are examined numerically on the basis of Navier‐Stokes equations. It is confirmed that, for sufficiently small Reynolds number, if points far enough from the cylinder are taken as inner mesh points, then the boundary conditions have little influence on the results, and the drag coefficients approach the values calculated by Imai's formula rather than those calculated based on Oseen's theory.