Abstract
A pair of curved gauzes with non-uniform porosity was used to generate a strong constant-shear flow with low turbulence intensity. The complex features of this flow around a circular cylinder with its axis normal to the vorticity and mean velocity vectors were studied. Methods such as the use of end plates, inclusion of gaps at the junctions of the cylinder with the end plates, and fluid withdrawal were applied to minimize end effects. Exploratory studies were made to investigate shear effects on the vortex-wake formation region with Reynolds numbers between 800 and 1.4 × 104. Effects of the steepness factor on vortex formation were explained by regarding secondary flow in the base region of the cylinder as negative base bleeding which behaves as a wake interference element.
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