Figure 11

Schlieren images of the flow field during (a) attached flow, (b) stage I of separated flow, (c) stage II of separated flow, (d) stage III of separated flow, (e) stage I of oscillatory flow, and (f) stage II of oscillatory flow. The fPSD contours of flow field during (a*) attached flow, (b*) stage I of separated flow, (c*) stage II of separated flow, (d*) stage III of separated flow, (e*) stage I of oscillatory flow, and (f*) stage II of oscillatory flow at the corresponding dominant frequency.