M. Behr et al., INCOMPRESSIBLE-FLOW PAST A CIRCULAR-CYLINDER - DEPENDENCE OF THE COMPUTED FLOW-FIELD ON THE LOCATION OF THE LATERAL BOUNDARIES, Computer methods in applied mechanics and engineering, 123(1-4), 1995, pp. 309-316
The influence of the location of the lateral boundaries on 2D computat
ion of unsteady incompressible flow past a circular cylinder is invest
igated. The case of Reynolds number 100 is used as a benchmark, and se
veral quantities characterizing the unsteady flow are obtained for a r
ange of lateral boundary locations. The computations are performed wit
h two distinct finite element formulations - space-time velocity-press
ure formulation and velocity-pressure-stress formulation. We conclude
that the distance between the cylinder and the lateral boundaries can
have a significant effect on the Strouhal number and other flow quanti
ties. The minimum distance at which this influence vanishes has been f
ound to be larger than what is commonly assumed.