Consider the visualization of flow over a 15° delta wing in Fig. P11-28C. Are we seeing streamlines, streaklines, pathlines, or timelines? Explain.
Visualization of flow over a 15° delta wing at a 20° angle of attack at a Reynolds number of 20.000. The visualization is produced by colored fluid injected into water from ports on the underside of the wing.
Curtesy ONERA. Photograph by Werlé.