Flow Motions


 These movies show the steady states and turbulent solutions in plane Couette flow. You need to have the QuickTime plug-in installed on your system in order to play the movies.

(α,γ,R)=(1,2,1000). The flow decays back to laminar flow in one direction. The flow shoots to a turbulent state in the other direction.

The cross-section view of the transition to turbulence from the perturbed lower branch steady state in plane Couette flow at (α,γ,R)=(1.14,2.5,1000). t=300~600. Left top: the velocity field in a cross-section, red indicating flow moving towards the viewer, blue away. Left bottom: the streamwise component of vorticity, red positive, blue negative. Middle: the velocity field in y=0 plane. Right: drag on the upper wall, red high drag, blue low drag.

The bifurcation of the eigenvalues as the solution moves from lower branch to upper branch in plane Couette flow at (α,γ)=(1.14,2.5).