New Findings by High-Order DNS for Late Flow Transition in a Boundary Layer

Figure 26

Contours of streamwise velocity disturbance u in the (x, z)-plane at t = 6.6T. Light shades of gray correspond to high values.

(a) 𝑦=5.5. ten contour levels −0.474~0.150

(b) 𝑦=4.4. ten contour levels −0.332~0.340