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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: |
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| 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: | L AR - 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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