A METHOD OF DOMAIN DECOMPOSITION FOR CALCULATING THE STEADY FLOW PASTA CYLINDER

For flow past a cylinder it is known that the vorticity is only signif icant in a thin boundary-layer adjacent to the,surface and within a pa rabolic wake far from the cylinder. To address this behaviour of the v orticity a numerical method is implemented whereby the flow field is d ecomposed into two regions: an inner region to deal with boundary-laye r phenomena and an outer region to model wake phenomena. This method e qually applies to any cylinder cross section. The equations of motion are solved in each region and are matched at the boundary. Numerical s olutions have been carried out for the trial case of a circular cylind er and the agreement with existing results is good.