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Original title:
Decomposition Methods in Turbulence Research
Authors: Uruba, Václav
Document type: Papers
Conference/Event: Experimental Fluid Mechanics 2011, Jičín (CZ), 2011-11-22 / 2011-11-25
Year: 2011
Language: eng
Abstract: Nowadays we have the dynamical velocity vector field of turbulent flow at our disposal coming thanks advances of either mathematical simulation (DNS) or of experiment (time-resolved PIV). Unfortunately there is no standard method for analysis of such data describing complicated extended dynamical systems, which is characterized by excessive number of degrees of freedom. An overview of candidate methods convenient to spatiotemporal analysis for such systems is to be presented. Special attention will be paid to energetic methods including Proper Orthogonal Decomposition (POD) in regular and snapshot variants as well as the Bi-Orthogonal Decomposition (BOD) for joint space-time analysis. Then, stability analysis using Principal Oscillation Patterns (POPs) will be introduced. Finally, the Independent Component Analysis (ICA) method will be proposed for detection of coherent structures in turbulent flow-field defined by time-dependent velocity vector field. Principle and some practical aspects of the methods are to be shown. Special attention is to be paid to physical interpretation of outputs of the methods listed above.
Keywords: decomposition; spatio-temporal data; turbulence
Project no.: CEZ:AV0Z20760514 (CEP), GA101/08/1112 (CEP), GAP101/10/1230 (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: Proceedings of the International Conference Experimental Fluid Mechanics 2011, ISBN 978-80-7372-784-0
Note: Související webová stránka: http://orion.kez.tul.cz/efm/
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0203586
Permalink: http://www.nusl.cz/ntk/nusl-80960
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Authors: Uruba, Václav
Document type: Papers
Conference/Event: Experimental Fluid Mechanics 2011, Jičín (CZ), 2011-11-22 / 2011-11-25
Year: 2011
Language: eng
Abstract: Nowadays we have the dynamical velocity vector field of turbulent flow at our disposal coming thanks advances of either mathematical simulation (DNS) or of experiment (time-resolved PIV). Unfortunately there is no standard method for analysis of such data describing complicated extended dynamical systems, which is characterized by excessive number of degrees of freedom. An overview of candidate methods convenient to spatiotemporal analysis for such systems is to be presented. Special attention will be paid to energetic methods including Proper Orthogonal Decomposition (POD) in regular and snapshot variants as well as the Bi-Orthogonal Decomposition (BOD) for joint space-time analysis. Then, stability analysis using Principal Oscillation Patterns (POPs) will be introduced. Finally, the Independent Component Analysis (ICA) method will be proposed for detection of coherent structures in turbulent flow-field defined by time-dependent velocity vector field. Principle and some practical aspects of the methods are to be shown. Special attention is to be paid to physical interpretation of outputs of the methods listed above.
Keywords: decomposition; spatio-temporal data; turbulence
Project no.: CEZ:AV0Z20760514 (CEP), GA101/08/1112 (CEP), GAP101/10/1230 (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: Proceedings of the International Conference Experimental Fluid Mechanics 2011, ISBN 978-80-7372-784-0
Note: Související webová stránka: http://orion.kez.tul.cz/efm/
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0203586
Permalink: http://www.nusl.cz/ntk/nusl-80960
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Record created 2012-01-11, last modified 2024-01-26