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Flow structure identification in a high-resolution tomographic PIV data set of the flow behind a backward facing step

Schanz, Daniel and Schröder, Andreas and Heine, Benjamin and Dierksheide, Uwe (2012) Flow structure identification in a high-resolution tomographic PIV data set of the flow behind a backward facing step. 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 09.- 12. Jul. 2012, Lisbon, Portugal.

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Official URL: http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2012/program.asp

Abstract

The flow behind a backward facing step of 6 mm in height has been investigated by means of high-resolution tomographic PIV. The shedding of vortices was stabilized by acoustic excitation, enabling phase-locked measurements of the flow field in a volume of 70x95x7 mm3. The gathered vector volumes with a vector spacing of approx. 0.25 mm in each direction were investigated by the method of conditional averaging. Basic flow structures, related to Q2 and Q4-events were extracted and their development in time was characterized, using methods of joint probability density functions of the fluctuations and of the invariants of the velocity gradient tensor.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Flow structure identification in a high-resolution tomographic PIV data set of the flow behind a backward facing step
Authors:
AuthorsInstitution or Email of Authors
Schanz, DanielUNSPECIFIED
Schröder, AndreasUNSPECIFIED
Heine, BenjaminUNSPECIFIED
Dierksheide, UweLaVision, Göttingen
Date:2012
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-12
Series Name:Conference Proceedings online
Status:Published
Keywords:Tomographic PIV, backward facing step, conditional averaging
Event Title:16th International Symposium on Applications of Laser Techniques to Fluid Mechanics
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:09.- 12. Jul. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:19 Jul 2012 09:38
Last Modified:09 Oct 2012 15:03

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