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Title of Journal: Exp Fluids

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Abbravation: Experiments in Fluids

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Springer-Verlag

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DOI

10.1002/recl.19140330301

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1432-1114

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Reynolds number dependence of the inertial range s

Authors: Z Hao T Zhou Y Zhou J Mi
Publish Date: 2007/10/13
Volume: 44, Issue: 2, Pages: 279-289
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Abstract

The full energy dissipation rate and enstrophy are measured simultaneously using a probe consisting of four Xwires in the intermediate region of a cylinder wake for Taylor microscale Reynolds number in the range of 120–320 Longitudinal and transverse velocity increments are also obtained temporally using Taylor’s hypothesis The inertial range scaling exponents indicate that the full enstrophy field has a stronger intermittency than does the full dissipation field for all the Reynolds numbers considered The approximations of the energy dissipation rate and enstrophy based on isotropy are more intermittent than their corresponding true values While the scaling exponents of the full energy dissipation rate remain approximately constant for different Reynolds numbers those of the enstrophy decrease slightly and consistently with the increase of Reynolds number It is conjectured that the scaling of the energy dissipation rate and the enstrophy may be the same when Reynolds number is extremely high a trend that is consistent with that suggested by Nelkin Phys Fluids 112202–2204 1999 Am J Phys 68310–318 2000

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