How does flow in a pipe become turbulent?

Abstract

The transition to turbulence in pipe flow does not follow the scenario familiar from Rayleigh-Benard or Taylor-Couette flow since the laminar profile is stable against infinitesimal perturbations for all Reynolds numbers. Moreover, even when the flow speed is high enough and the perturbation sufficiently strong such that turbulent flow is established, it can return to the laminar state without any indication of the imminent decay. In this parameter range, the lifetimes of perturbations show a sensitive dependence on initial conditions and an exponential distribution. The turbulence seems to be supported by three-dimensional travelling waves which appear transiently in the flow field. The boundary between laminar and turbulent dynamics is formed by the stable manifold of an invariant chaotic state. We will also discuss the relation between observations in short, periodically continued domains, and the dynamics in fully extended puffs.

for the proceedings of statphys 23

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Cited by in corpus (6)

• Understanding viscoelastic flow instabilities: Oldroyd-B and beyond
• Interpreted machine learning in fluid dynamics: Explaining relaminarisation events in wall-bounded shear flows
• Stable Manifolds and the Transition to Turbulence in Pipe Flow
• Sudden relaminarisation and lifetimes in forced isotropic turbulence
• Subcritical instabilities in plane Poiseuille flow of an Oldroyd-B fluid
• Long wavelength instability of coherent structures in plane Couette flow