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Turbulence stripe i...
Turbulence stripe in transitional channel flow with/without system rotation
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Tsukahara, T. (författare)
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Kawaguchi, Y. (författare)
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Kawamura, H. (författare)
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- Tillmark, Nils (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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- Alfredsson, P. Henrik (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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(creator_code:org_t)
- 2009-11-10
- 2010
- Engelska.
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Ingår i: 7th IUTAM Symposium on Laminar-Turbulent Transition. - Dordrecht : Springer Science+Business Media B.V.. ; , s. 421-426
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We 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 be seen as an intrinsic phenomenon in the reverse transition in a channel flow.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Computational domains
- Couette
- Mean flow
- Plane channels
- Plane Couette flow
- Poiseuille flow
- Stripe pattern
- System rotation
- Aspect ratio
- Channel flow
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)