Abstract
A computational technique for unsteady incompressible viscid flow applicable to any 2-dimensional flow geometry is presented. The method adopts a stream function vorticity approach and uses an Alternate Direction Implicit Technique to march the vorticity in time, and a successive over-relaxation technique to obtain the stream function at each time level. Initial calculations are presented for the vortex shedding from a circular cylinder where the Strouhal number is computed to within 10% of the empirical value over a range of Reynolds numbers up to 1250. The flow within a commercial vortex-shedding meter is also computed and results indicate how the design of the bluff body affects the strength of the shed vortices and they also highlight the best locations for the frequency detector.
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