Abstract
It is known that for a square cylinder subjected to uniform flow, the drag force changes with the shape of corner cutoffs. To clarify the flow characteristics around a square cylinder with corner cutoffs we measured the drag coefficient for changing chamfer shape and dimensions. We analyzed the flow around a square cylinder with corner cutoffs by applying the RNG k-ε turbulent model, and investigated the surface flow pattern using visualization by means of the oil-film and mist flow method. From these results, we obtained the surface flow patterns by the oil-film method and numerical analysis. The drag coefficient of the square cylinder with 10% corner cutoffs was found to decrease by about 30 % compared with that for the square cylinder, since the wake area of this square cylinder was smaller compared with that of the other square cylinder.
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