Description and detection of burst events in turbulent flows

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Title: Description and detection of burst events in turbulent flows
Authors: Schmid, PJ
Garcia-Gutierrez, A
Jimenez, J
Item Type: Conference Paper
Abstract: A mathematical and computational framework is developed for the detection and identification of coherent structures in turbulent wall-bounded shear flows. In a first step, this data-based technique will use an embedding methodology to formulate the fluid motion as a phase-space trajectory, from which state-transition probabilities can be computed. Within this formalism, a second step then applies repeated clustering and graph-community techniques to determine a hierarchy of coherent structures ranked by their persistencies. This latter information will be used to detect highly transitory states that act as precursors to violent and intermittent events in turbulent fluid motion (e.g., bursts). Used as an analysis tool, this technique allows the objective identification of intermittent (but important) events in turbulent fluid motion; however, it also lays the foundation for advanced control strategies for their manipulation. The techniques are applied to low-dimensional model equations for turbulent transport, such as the self-sustaining process (SSP), for varying levels of complexity.
Editors: Jimenez, J
Issue Date: 12-Apr-2018
Date of Acceptance: 29-May-2017
ISSN: 1742-6588
Publisher: Institute of Physics (IoP)
Journal / Book Title: Journal of Physics : Conference Series
Volume: 1001
Issue: Conference 1
Copyright Statement: © 2018 IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd.
Conference Name: Third Madrid Summer School on Turbulence
Keywords: Science & Technology
Physical Sciences
Physics, Applied
Physics, Multidisciplinary
02 Physical Sciences
09 Engineering
Publication Status: Published
Start Date: 2017-05-29
Finish Date: 2017-06-30
Conference Place: Univ Politecnica Madrid, Sch Aeronaut, Madrid, Spain
Online Publication Date: 2018-04-12
Appears in Collections:Mathematics
Applied Mathematics and Mathematical Physics
Faculty of Natural Sciences

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