Movie 1
Laminar to turbulent transition for Re≈ 1×106: (a) axial vorticity extracted by stereoscopic PIV in the near-wall region; (b) azimuthal velocity averaged in azimuthal direction and fitted laminar solution of Neitzel (1982); (c) boundary-layer thickness as a function of time. In the present movie the onset of the linear instability causes case (ii) before the characteristic case (iii) is detected.

Movie 2
Laminar to turbulent transition for Re≈2.6×106: (a) axial vorticity extracted by stereoscopic PIV in the near-wall region; (b) azimuthal velocity averaged in azimuthal direction and fitted laminar solution of Neitzel (1982); (c) boundary-layer thickness as a function of time. In the present movie the onset of the linear instability is detected by case (iii) and occurs before the CORIOLIS II platform was fully at rest.