Figure 2. Transition between laminar and turbulent flow in fluid over a flat plate [9]

From

Drag Reduction by Using the Microriblet of Sawtooth and Scalloped Types

Alireza Heidarian, Hassan Ghassemi, Pengfei Liu

International Journal of Physics. 2018, 6(3), 93-98 doi:10.12691/ijp-6-3-5