Do extreme events trigger turbulence decay? – a numerical study of turbulence decay time in pipe flows

Abstract
Turbulence locally created in laminar pipe flows shows sudden decay or splitting after a stochastic waiting time. In laboratory experiments, the mean waiting time was observed to increase double-exponentially as the Reynolds number ( we studied. We also discuss using another extreme value distribution, Fréchet distribution, instead of the Gumbel distribution to approximate the histogram of the turbulence intensify, which reveals interesting perspectives.