Flow properties and wake structures behind bluff bodies was one of the interesting topics between scholars for many years. Such interest in this phenomenon is due to various applications of bluff bodies in engineering and industry. In this study a comparison of flow structures of the wake of circular cylinder, semi-circular and c shape cylinders have been presented. The wake flows have been compared in terms of shedding frequency, Reynolds stress and turbulent kinetic energy (TKE) to identify

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... y similarities between these geometries. It was found that the highest value of TKE occurred on either side of the separated shear layer. Moreover, it was observed that as the TKE develops in the downstream the peaks were shifted towards centerline in the wake region.