Persistent turbulence in annealed plane Couette flow
Fachbereich Physik, Philipps Universität Marburg -
D-35032 Marburg, Germany
Accepted: 23 June 2000
We study in numerical experiments in plane Couette flow the possibility to follow a turbulent state created at higher Reynolds numbers down to lower ones. For annealing rates faster than the escape time but slower than the relaxation rate to the turbulent state turbulence persisted for some time down to Reynolds numbers around 240. This is less than the accepted value for the transition to turbulence (about 320) but still larger than the lowest bifurcation point for stationary states (about 125).
PACS: 47.20.Ft – Instability of shear flows / 47.15.Fe – Stability of laminar flows / 05.45.-a – Nonlinear dynamics and nonlinear dynamical systems
© EDP Sciences, 2000