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

Figure 23

Vector field of (v, w)-velocity disturbance (a) and contours of streamwise velocity disturbance u (b) in the (y, z)-plane at 𝑡=6.6𝑇, 𝑥=464, (c) 𝑡=6.6𝑇 and 𝑥=462. Thick arrows display downward and upward motions associated with sweep 2 and ejection 2 events, respectively.

(a) Vector field

(b) Ten contour levels −0.125~0.323

(c) Vector field at 𝑥=462