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Article
Turbulence stripe in transitional channel flow with/without system rotation
| Authors: |
Tsukahara, T, Kawaguchi, Y, Kawamura, H, Tillmark, N.T., Alfredsson, P.H. |
| Document Type: |
Conference |
| Pubstate: |
Published |
| Journal: |
Proceedings of the Seventh IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, Sweden, 2009 |
| Volume: |
421-426 |
| Year: |
2010 |
AbstractWe report direct numerical simulations and experiments conducted in two types of plane channel flows plane Poiseuille flow and plane Couette flows without/with system rotation considering the subcritical-transition regime with using large aspect-ratio computational domains and channels Both flows give rise to coexisting laminar and turbulent equilibrium regions in the form of oblique stripes, which are tilted by a certain angle with respect to the mean flow When subjected to a stabilizing rotation, the Couette turbulence is locally quenched and exhibits the stripe pattern as similar to non-rotating cases. In this context, the turbulence stripe can he seen as an intrinsic phenomenon in the reverse transition in a channel flow.
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