Effect of the angle of attack on flow around an elliptic cylinder near a moving wall

The present work investigates the combined effect of angle attack ( AOA) (the between semi-major axis cylinder and vertical axis), gap ratio G/ D (where G represents distance center moving wall denotes elliptic cylinder) on flow around an near a wall. Here, AOA covers [Formula: see text], text] with ranging from 0.6 to 2.5. Reynolds number (based free-stream velocity axis) is fixed 150. resulting Kármán vortex street, two-layered wake, secondary street have been investigated visualized. patterns classified mapped out in D, AOA)-space. At small ratios, clockwise rotation (negative leads stronger suppression backside cylinder. This results more transitions different wake than for counterclockwise rotated (positive AOA). As more, either or (i.e., as increases), crest value drag coefficient decreases while lift first increases then text]. For given time-averaged increased cylinder, except increase observed Moreover, force directed upward downward positive negative AOA, respectively, its magnitude when rotated, it rotated.