| Transition in localized pipe flow turbulence. | |
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MedLine Citation:
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PMID: 19792506 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Direct numerical simulation of transitional pipe flow is carried out in a long computational domain in order to characterize the dynamics within the saddle region of phase space that separates laminar flow from turbulent intermittency. For Reynolds numbers ranging from Re=1800 to 2800, a shoot and bisection method is used to compute critical trajectories. The chaotic saddle or edge state approached by these trajectories is studied in detail. For Re< or =2000 the edge state and the corresponding intermittent puff are shown to share similar averaged global properties. For Re> or =2200, the puff length grows unboundedly whereas the edge state varies only little with Re. In this regime, transition is shown to proceed in two steps: first the energy grows to produce a localized turbulent patch, which then, during the second stage, spreads out to fill the pipe. |
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Authors:
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Fernando Mellibovsky; Alvaro Meseguer; Tobias M Schneider; Bruno Eckhardt |
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Publication Detail:
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Type: Journal Article Date: 2009-07-31 |
Journal Detail:
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Title: Physical review letters Volume: 103 ISSN: 0031-9007 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-10-01 Completed Date: 2009-10-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 054502 Citation Subset: - |
Affiliation:
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Departament de Física Aplicada, Universitat Politècnica de Catalunya, 08034, Barcelona, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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