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Structural analysis of turbulent transport in a heated drag-reducing channel flow with surfactant additives.

Author(s) : LI H., KAWAGUCHI Y., HISHIDA K.

Type of article: Article

Summary

Turbulence transport features in a heated drag-reducing surfactant solution (CTAC, 30 wppm) channel flow was investigated by simultaneously measuring velocity and temperature fluctuations in the thermal boundary layer. Structural analysis showed that the drag-reducing additives inhibited the motions associated with ejections of low-momentum fluid away from the wall and sweeps of high-momentum fluid toward the wall (the second and fourth quadrant motion respectively) but had no obvious effect on the outward motion of high-momentum fluid and wall-ward motion of low-momentum fluid (the first and third quadrant motion respectively). The depression of wall-normal turbulent heat flux was due to the decreased contributions of the second and fourth quadrant motions.

Details

  • Original title: Structural analysis of turbulent transport in a heated drag-reducing channel flow with surfactant additives.
  • Record ID : 2005-1710
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 48 - n. 5
  • Publication date: 2005/02

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