Numerical Study of a Viscous Fluid Flow past a Circular Cylinder

A systematic numerical study of the unsteady viscous incompressible fluid flow past a circular cylinder is reported. The range of the Reynolds number considered is 1 to 100. The steady state solutions could be obtained at the Reynolds numer R =10, 20, 30, 40, 50 as the limit of the unsteady state solutions. The numerical results are compared with those for the steady problem and they are found to be in agreement. Dependence of the flow pattern, vorticity distribution, pressure distribution and the drag are shown on the Reynolds number and the time.