Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11958
Title: Reynolds number dependence of the inertial range scaling of energy dissipation rate and enstrophy in a cylinder wake
Authors: Hao, Z
Zhou, T
Zhou, Y
Mi, J
Issue Date: 2008
Publisher: Springer
Source: Experiments in fluids, 2008, v. 44, no. 2, p. 279-289 How to cite?
Journal: Experiments in Fluids 
Abstract: The full energy dissipation rate and enstrophy are measured simultaneously using a probe consisting of four X-wires 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 11:2202-2204, 1999; Am J Phys 68:310-318, 2000).
URI: http://hdl.handle.net/10397/11958
DOI: 10.1007/s00348-007-0400-5
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