Secondary motions in turbulent ribbed channel flows

HIGHLIGHTS

• What: As the authors pointed out, a more appropriate surface heterogeneity parameter would need to be a function of both ξ and H/S. Note that the work of Medjnoun et_al was in the context of boundary layers, so that H was in fact the boundary layer thickness, δ, but there is no reason to doubt that the same arguments hold for the corresponding channel flows. Before discussing the latter, the authors show in figure 12(a) profiles of ũ ũ + for the various cases with W/S=0.25 and, in figure 12(c), similar profiles for W . . .
  

   

  

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