Fluid-dynamic forces and wake frequencies on a tilted rectangular cylinder near a solid wall |
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Authors: | S Malavasi E Zappa |
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Institution: | (1) D.I.I.A.R., Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy;(2) Mechanical Department, Politecnico di Milano, Via La Masa, 34, 20156 Milano, Italy |
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Abstract: | We investigate the impact of different boundary conditions on the flow field developing around a tilted rectangular cylinder
with two different values of the aspect ratio (l/s=3 and 4). We are mainly interested in analyzing the changes in force coefficients and in the vortex shedding Strouhal number
when the cylinder is placed at various distances from a bottom wall and different values of attack angle. The angle of attack
ranges between −30° and +30° and the cylinder elevation above the bottom wall is varied between almost zero and 5 times the
thickness of the cylinder. A large body of experimental results is related to the small elevation conditions at different
attack angles, where the presence of the wall has a non-negligible effect on the behavior of the force coefficients and Strouhal
number of the vortex shedding. |
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Keywords: | Confined flow Cylinders Attack angle Drag Lift Strouhal number |
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