Self-sustained localized structures in a boundary-layer flow
Duguet Y, Schlatter P, Henningson DS, Eckhardt B (2012)
Publication Type: Journal article
Publication year: 2012
Journal
Book Volume: 108
Article Number: 044501
Journal Issue: 4
DOI: 10.1103/PhysRevLett.108.044501
Abstract
When a boundary layer starts to develop spatially over a flat plate, only disturbances of sufficiently large amplitude survive and trigger turbulence subcritically. Direct numerical simulation of the Blasius boundary-layer flow is carried out to track the dynamics in the region of phase space separating transitional from relaminarizing trajectories. In this intermediate regime, the corresponding disturbance is fully localized and spreads slowly in space. This structure is dominated by a robust pair of low-speed streaks, whose convective instabilities spawn hairpin vortices evolving downstream into transient disturbances. A quasicyclic mechanism for the generation of offspring is unfolded using dynamical rescaling with the local boundary-layer thickness. © 2012 American Physical Society.
Authors with CRIS profile
Involved external institutions
Computer Science Laboratory for Mechanics and Engineering Sciences / Laboratoire d'informatique pour la mécanique et les sciences de l'ingénieur (LIMSI-CNRS)
France (FR)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
Philipps-Universität Marburg
Germany (DE)
France (FR)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
Philipps-Universität Marburg
Germany (DE)
How to cite
APA:
Duguet, Y., Schlatter, P., Henningson, D.S., & Eckhardt, B. (2012). Self-sustained localized structures in a boundary-layer flow. Physical Review Letters, 108(4). https://doi.org/10.1103/PhysRevLett.108.044501
MLA:
Duguet, Yohann, et al. "Self-sustained localized structures in a boundary-layer flow." Physical Review Letters 108.4 (2012).
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