(A) ReD = 15,000. Dye streaks in water.
	(B) ReD =15,000. Air bubbles in water.
	(C) ReD = 30,000. Dye streaks in water.
	(D) ReD = 30,000. Air bubbles in water.

(Boundary Layer Analysis Figure 1-12 85,p 24)

Flow visualizations for the turbulent flow in the wake of a sphere at various Reynolds numbers by Werle (1982) at ONERA

(A) Visualization of laminar separation from a curved wall by Werle (1982) at ONERA. Air bubbles in water.

(B) Visualization of laminar separation from an airfoil at angle of attack by Werle (1982) at ONERA. Dye streaks in water.

(Boundary Layer Analysis Figure 1-10,p 20)

Illustrations of the boundary layer separation process.