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Fully localised edg...
Fully localised edge states in boundary layers
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- Khapko, Taras (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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Kreilos, T. (författare)
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- Schlatter, Philipp (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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visa fler...
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Duguet, Y. (författare)
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Eckhardt, B. (författare)
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- Henningson, Dan S. (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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visa färre...
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(creator_code:org_t)
- TU Delft, 2015
- 2015
- Engelska.
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Ingår i: Proceedings - 15th European Turbulence Conference, ETC 2015. - : TU Delft.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Investigation of the laminar–turbulent boundary is performed in a boundary-layer flow. Constant homogeneous suction is applied at the wall in order to prevent the spatial growth of the layer, leading to the parallel Asymptotic Suction Boundary Layer (ASBL). Edge tracking is performed in a large computational domain allowing for full spatial localisation of the structures on the laminar–turbulent separatrix. The obtained dynamics of the state goes through calm and bursting phases. During the latter the structure grows in size, shedding vortices downstream of its core which viscously decay during the calm phases. Comparison with the computation in spatially growing boundary layer is made. The influence of the Reynolds number and the path leading from the edge state to turbulent flow are considered.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Nyckelord
- Atmospheric thermodynamics
- Boundary layer flow
- Reynolds number
- Turbulence
- Computational domains
- Edge state
- Edge tracking
- Localisation
- Separatrix
- Shedding vortex
- Spatial growth
- Turbulent boundary
- Laminar boundary layer
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)