Turbulent bursts and torque maxima in Taylor-Couette flow: Extended abstract

Hannes J. Brauckmann, Bruno Eckhardt

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Abstract

In Taylor-Couette flow with sufficiently strong counter-rotating cylinders, the turbulence near the outer cylinder shows intermittent oscillations in form of turbulent bursts. We present this phenomenon in direct numerical simulations for radius ratios η = 0.5 and 0.71 and identify a critical value in the rotation ratio µ for its onset. We propose a physical model for this critical value that also rationalizes the observed agreement with the rotation ratio of the torque maximum. While this model conforms well with the observations for these radius ratios, it most likely has to be refined or replaced for η → 1, as further simulations for η ≥ 0.9 show.

Original languageEnglish
Title of host publicationProceedings of the 14th European Turbulence Conference
PublisherZakon Group
Number of pages2
Publication statusPublished - 2013
Event14th European Turbulence Conference, ETC 2013 - Lyon, France
Duration: 1 Sep 20134 Sep 2013

Conference

Conference14th European Turbulence Conference, ETC 2013
CountryFrance
CityLyon
Period1/09/134/09/13

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