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  Self-similar decay of high Reynolds number Taylor-Couette turbulence.

Verschoof, R. A., Huisman, S. G., van der Veen, R. C. A., Sun, C., & Lohse, D. (2016). Self-similar decay of high Reynolds number Taylor-Couette turbulence. Physical Review Fluids, 1(6): 062402. doi:10.1103/PhysRevFluids.1.062402.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-38F7-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-411F-C
Genre: Journal Article

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 Creators:
Verschoof, R. A., Author
Huisman, S. G., Author
van der Veen, R. C. A., Author
Sun, C., Author
Lohse, Detlef1, Author              
Affiliations:
1Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063285              

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 Abstract: We study the decay of high-Reynolds-number Taylor-Couette turbulence, i.e., the turbulent flow between two coaxial rotating cylinders. To do so, the rotation of the inner cylinder (Re-i = 2 x 10(6), the outer cylinder is at rest) is stopped within 12 s, thus fully removing the energy input to the system. Using a combination of laser Doppler anemometry and particle image velocimetry measurements, six decay decades of the kinetic energy could be captured. First, in the absence of cylinder rotation, the flow-velocity during the decay does not develop any height dependence in contrast to the well-known Taylor vortex state. Second, the radial profile of the azimuthal velocity is found to be self-similar. Nonetheless, the decay of this wall-bounded inhomogeneous turbulent flow does not follow a strict power law as for decaying turbulent homogeneous isotropic flows, but it is faster, due to the strong viscous drag applied by the bounding walls. We theoretically describe the decay in a quantitative way by taking the effects of additional friction at the walls into account.

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Language(s): eng - English
 Dates: 2016-10-27
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevFluids.1.062402
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Title: Physical Review Fluids
Source Genre: Journal
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Pages: 9 Volume / Issue: 1 (6) Sequence Number: 062402 Start / End Page: - Identifier: -