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The dynamic importance of spanwise vorticity and vortex filaments has been assessed in steady, uniform open-channel flows by means of particle image velocimetry (PIV). By expressing the net force due

The dynamic importance of spanwise vorticity and vortex filaments has been assessed in steady, uniform open-channel flows by means of particle image velocimetry (PIV). By expressing the net force due to Reynolds’ turbulent shear stress, ∂(−[bar over uv]) ∂y, in terms of two velocity-vorticity correlations, [bar over vω[subscript z]] and [bar over wω[subscript y]], the results show that both spanwise vorticity [bar over ω[subscript z]] and the portion of it that is due to spanwise filaments make important contributions to the net force and hence the shape of the mean flow profile.

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Date Created
  • 2013-11-30
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    Identifier
    • Digital object identifier: 10.1080/00221686.2014.919965
    • Identifier Type
      International standard serial number
      Identifier Value
      0022-1686
    • Identifier Type
      International standard serial number
      Identifier Value
      1814-2079
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    Chen, Qigang, Adrian, Ronald J., Zhong, Qiang, Li, Danxun, & Wang, Xingkui (2014). Experimental study on the role of spanwise vorticity and vortex filaments in the outer region of open-channel flow. JOURNAL OF HYDRAULIC RESEARCH, 52(4), 476-489. http://dx.doi.org/10.1080/00221686.2014.919965

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