Optimal Taylor-Couette turbulence

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Strongly turbulent Taylor-Couette flow with independently rotating inner and outer cylinders with a radius ratio of η = 0.716 is experimentally studied. From global torque measurements, we analyse the dimensionless angular velocity flux Nuω(Ta, a) as a function of the Taylor number Ta and the angular velocity ratio a = −ωo/ωi in the large-Taylor-number regime 1011. Ta. 1013 and well off the inviscid stability borders (Rayleigh lines) a = −η2 for co-rotation and a = ∞ for counter-rotation. With the help of laser Doppler anemometry, we provide angular velocity profiles and in particular identify the radial position rn of the neutral line, defined by hω(rn)it = 0.

Original languageEnglish
Publication statusPublished - Sept 2013
Event14th European Turbulence Conference, ETC 2013 - Lyon, France
Duration: 1 Sept 20134 Sept 2013
Conference number: 14


Conference14th European Turbulence Conference, ETC 2013
Abbreviated titleETC


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