Marginally turbulent flow in a square duct

  title={Marginally turbulent flow in a square duct},
  author={By MARKUS UHLMANN and Alfredo Pinelli and Genta Kawahara and ATSUSHI SEKIMOTO},
  • By MARKUS UHLMANN, Alfredo Pinelli, +1 author ATSUSHI SEKIMOTO
  • Published 2007
Direct numerical simulation of turbulent flow in a straight square duct was performed in order to determine the minimal requirements for self-sustaining turbulence. It was found that turbulence can be maintained for values of the bulk Reynolds number above approximately 1100, corresponding to a friction-velocity-based Reynolds number of 80. The minimum value for the streamwise period of the computational domain measures around 190 wall units, roughly independently of the Reynolds number… CONTINUE READING


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