Forcing large-scale coherent streaks in a zero pressure gradient turbulent boundary layer

Details Forcing large-scale coherent streaks in a zero pressure gradient turbulent boundary layer Forcing large-scale coherent streaks in a zero pressure gradient turbulent boundary layer

2010-04-26

arxiv.org/abs/1004.4535v1

Revised for publication in Journal of Turbulence 2010

Physics

Fluid Dynamics

Scientific paper

Large scale coherent streaks are artificially forced in a well developed turbulent boundary layer at $\Redstar \approx 1000$ using an array of cylindrical roughness elements. Measures of the velocity field with particle image velocimetry reveal the presence of well reproducible, streamwise oriented, steady coherent streaks. We show that the amplitude of these coherent streaks transiently grows in space. The position of the maximum amplitude is proportional to the spanwise wavelength of the streaks and the most amplified spanwise wavelength is of very large scale $\lz \approx 6 \dblo$. These results are in good agreement with the recent predictions based on the optimal transient growth analysis of turbulent mean flows.

Affiliated with

Also associated with

No associations

Rating

Forcing large-scale coherent streaks in a zero pressure gradient turbulent boundary layer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Forcing large-scale coherent streaks in a zero pressure gradient turbulent boundary layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Forcing large-scale coherent streaks in a zero pressure gradient turbulent boundary layer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-32430