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The onset of sustained turbulence in pipe flow is a non-equilibrium phase transition between decaying and spreading turbulence [2]. However, the extremely long timescales of these processes in pipe flow make it very difficult to measure important signatures of criticality, such as the scaling of turbulent fraction. This information is necessary to determine the phase transition class of the onset of turbulence in shear flows. With this goal in mind we have built a Taylor-Couette experiment with an aspect ratio of more than 200 and an azimuthal length of more than 300 gap-widths, allowing us to measure turbulent fractions in the vicinity of the critical point.
Author(s):
[CANCELLED]
Kerstin Avila
Max Planck Institute for Dynamics and Self-Organization
Germany
Paul Steffen
Max Planck Institute for Dynamics and Self-Organization
Germany
Bjoern Hof
Max Planck Institute for Dynamics and Self-Organization
Germany