Other flows examples#

Boundary layer on a flat solid#

../_images/instability_flat_boudary_layer.png

Fig. 13 Sketch of the instabilities on a flat boundary layer.#

Boundary layer on a curvy solid (centrifugal and detachment)#

  • concave curve boundary: potentially unstable to the centrifugal instability.

  • convex curve boundary: separation (pressure gradient).

../_images/separation_boundary_layer.png

Fig. 14 Laminar and turbulence boundary layer on a curved solid.#

Vortex instabilities#

../_images/wake_aircraft.jpg

Fig. 15 Instabilities can develop in the vortices behind an aircraft.#

../_images/crow_instability.jpg

Fig. 16 Instabilities can develop in the vortices behind an aircraft.#

Poiseuille (plan and tube)#

Couette flow, Taylor-Couette flow#