this example examines an unsteady flow past a cylinder placed in a channel. The cylinder is offset somewhat from the center of the flow to make the steady-state symmetrical flow unstable. At the inlet, a Poiseuille profile is imposed on the velocity, where as the outlet implements an outflow condition: grad_x p = 0. At Reynolds numbers around 100, an unstable periodic pattern is created, the Karman vortex street.

Makefile
cylinder2d.cpp

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