Abstract:Though the effect of distributed roughness on flow over a sphere has been examined in detail, there have been few observations as to the effect of an isolated roughness element on the forces induced on a sphere that is in uniform flow. In this experimental study, we examine how the forces are altered due to both a stationary and dynamic three-dimensional roughness element in the Reynolds number range of 5 × 10 4 to 5 × 10 5 . It is found that even a small change to the geometry of the sphere, by adding a cylin… Show more
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