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Dynamic Mode Decomposition of Backward Facing Step Flow Simulation Data

Horchler, Tim and Mani, Karthik V. and Hannemann, Klaus (2015) Dynamic Mode Decomposition of Backward Facing Step Flow Simulation Data. AIAA Aviation - 22nd AIAA Computational Fluid Dynamics Conference, 22. - 26. June 2015, Dallas, Texas, USA. doi: 10.2514/6.2015-3411.

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2015-3411


Improved delayed detached eddy (IDDES) simulation results of a backward facing step flow are analyzed using dynamic mode decomposition (DMD). Different flow variables and the time-resolved skin friction coefficient are investigated and compared to a spectral analysis of the wall pressure fluctations. Although the flow field does not contain single dominant modes, two distinct flow features can be extracted and visualized using the DMD mode shapes. A low frequency flapping motion of the shear layer is found in the mode decomposition of the pressure, the wall-normal velocity and the skin friction coefficient. At higher frequencies, a wake mode similar to a von Karman vortex street is identified in the streamwise velocity, the pressure and the vorticity field.

Item URL in elib:https://elib.dlr.de/96161/
Document Type:Conference or Workshop Item (Speech)
Title:Dynamic Mode Decomposition of Backward Facing Step Flow Simulation Data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Horchler, Timtim.horchler (at) dlr.deUNSPECIFIED
Hannemann, Klausklaus.hannemann (at) dlr.deUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2015-3411
Page Range:pp. 1-15
Series Name:Conference Proceedings online
Keywords:Computational Fluid Dynamics (CFD), Skalenauflösende Simulationen, Dynamic Mode Decomposition, Backward Facing Step flow, Delayed Detached-Eddy simulation
Event Title:AIAA Aviation - 22nd AIAA Computational Fluid Dynamics Conference
Event Location:Dallas, Texas, USA
Event Type:international Conference
Event Dates:22. - 26. June 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Systemanalyse Raumtransport (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Micknaus, Ilka
Deposited On:21 Aug 2015 13:41
Last Modified:21 Aug 2015 13:41

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