Abstract
Furthermore, we define a new Reynolds number based on the diameter of the cylinder and the average speed of fluid flow at the cross section of Jt = 0, • Concluding Remarks The effects of the wall boundaries on the formation of the recirculating flow of the flow past a circular cylinder have been investigated. The computed data reveal that even at a small blockage ratio, such influence is still significant. This implies that care must be exercised when truncations of a flow domain is unavoidable for computational purposes. For a careful numerical study of the flow past a circular cylinder, it seems that the value of B should not exceed 0.05, or even smaller. In addition, it is also noticed that the uniform and parabolic velocity distribution at the upstream boundary do not lead to different centerline velocity profiles at the rear of the cylinder. Therefore, the upstream velocity distribution does not affect Rer because at this stage the Reynolds number is small and the viscous dissipation over the cylinder is strong.
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