Localized turbulence structures in transitional rectangular-duct flow
- Submitting institution
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City, University of London
- Unit of assessment
- 12 - Engineering
- Output identifier
- 1300
- Type
- D - Journal article
- DOI
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10.1017/jfm.2015.546
- Title of journal
- Journal of Fluid Mechanics
- Article number
- -
- First page
- 368
- Volume
- 782
- Issue
- -
- ISSN
- 0022-1120
- Open access status
- Out of scope for open access requirements
- Month of publication
- October
- Year of publication
- 2015
- URL
-
-
- Supplementary information
-
-
- Request cross-referral to
- -
- Output has been delayed by COVID-19
- No
- COVID-19 affected output statement
- -
- Forensic science
- No
- Criminology
- No
- Interdisciplinary
- No
- Number of additional authors
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4
- Research group(s)
-
-
- Proposed double-weighted
- No
- Reserve for an output with double weighting
- No
- Additional information
- The work addresses a hitherto not much studied feature of turbulent channel flows: the aspect ratio of the channel and its crucial impact for laminar-turbulent transition. High ARs lead to parallel flows unstable to infinitesimal perturbations. Lower ARs lead to transitions that can only occur via streamwise-localized structures similar to turbulent puffs in pipe flows. Therefore, to the first time a link between transition in channel and pipes was found, which is expected to largely improve predictions of friction drag in such flows. Homotopy analyses based on the obtained results will allow to find exact solutions underlying turbulent flows
- Author contribution statement
- -
- Non-English
- No
- English abstract
- -