Flow Control of a Rotating Cylinder by the Use of a Structured Surface: A Visualization of Flow Structures

Within the present numerical investigation different spherical grooves are applied to a circular cylinder. By the use of the overset grid method a spinning of the cylinder is combined by an in flow from a radial direction to simulate the flow around a rotating cylinder. The cylinder based Reynolds number is set to a fixed value of Re = 1:34 x 10^5. To determine the influence of the surface structure the groove geometry is varied. As a result, governing flow structures in and around an array of spherical grooves can be observed.