Abstract
The vortex wake of two parallel circular cylinders in tandem arrangement is investigated by visualization experiments using a towing a water tank. The cylinder spacing parameter L/d L being the distance between the two centers and d the cylinder diameter) is varied between 2 and 20 and the Reynolds number between 40 and 120. The flow visualition is orealized by the use of fine particles in suspension and/or white dye concentration dissolved into water, producing, respectively, streamline and streakline profiles of the relevant flow. In general, the flow analysis is carried out from direct observation of the visualization images but, in some cases, is complemented by image processing results pertaining to estimated values of stream function, vorticity and wake frequency.
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