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Effects of riblets upon flow stability

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Abstract

The onset of transition in the boundary layer over a grooved surface is studied by introducing the presence of grooves into the standarde 9 model with the aid of a previously obtained equivalent boundary condition. Under conditions of self-similarity and smallness of the grooves, Tollmien-Schlichting waves are found to be excited at a slightly smaller Reynolds number and Görtler vortices at a slightly larger one than on a smooth surface.

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Luchini, P., Trombetta, G. Effects of riblets upon flow stability. Appl. Sci. Res. 54, 313–321 (1995). https://doi.org/10.1007/BF00863516

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Key words

  • riblets
  • stability
  • Tollmien-Schlichting
  • Görtler