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Lagrangian and Eulerian investigation of the flow over periodic hills using advanced PIV and 4D-PTV “Shake-the-box”

Schröder, Andreas and Schanz, Daniel and Michaelis, Dirk and Cierpka, Christian and Scharnowski, Sven and Manhart, Michael and Kähler, Christian (2014) Lagrangian and Eulerian investigation of the flow over periodic hills using advanced PIV and 4D-PTV “Shake-the-box”. 10th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements, 17. - 19. September 2014, Marbella, Spanien.

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Official URL: http://www.etmm10.info/home.php

Abstract

In a joint experiment within the FP7 project AFDAR several advanced particle image velocimetry (PIV) and particle tracking velocimetry (PTV) methods have been successively applied to measure the flow within the the ERCOFTAC test case Nr. 81 “Periodic hill” water tunnel at TU Munich. Snapshot and time-resolved PIV, using an evaluation scheme based on single-pixel ensemble-correlation, as well as the newly developed high resolution 4D-PTV technique “Shake-the-box” (STB) have been applied. The results of the STB evaluation technique are dense, ghostless, highly accurate and nearly complete reconstructions of all particle positions per time step within relatively long Lagrangian tracks. The examination of the mean velocity, turbulence levels and Reynolds stress distributions indicate that with advanced measurement equipment and sophisticated evaluation techniques all flow features can be resolved. Single-pixel ensemble-correlation on a large number of 2D-PIV data provides the necessary spatial resolution to characterize the flow in a time averaged sense. The newly developed 4D-PTV measurement technique Shake-the-box enables the investigation of spatial and temporal dynamics of coherent structures and Lagrangian particle tracks.

Item URL in elib:https://elib.dlr.de/87730/
Document Type:Conference or Workshop Item (Speech)
Title:Lagrangian and Eulerian investigation of the flow over periodic hills using advanced PIV and 4D-PTV “Shake-the-box”
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schröder, Andreasandreas.schroeder (at) dlr.deUNSPECIFIED
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Michaelis, DirkLaVision, GöttingenUNSPECIFIED
Cierpka, ChristianUniBW MünchenUNSPECIFIED
Scharnowski, SvenUni BW MünchenUNSPECIFIED
Manhart, MichaelTU MünchenUNSPECIFIED
Kähler, ChristianUniBw MünchenUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Book of Summeries, Session 3
Status:Published
Keywords:4D-PTV, Lagrangian, Periodic Hills, Wall Turbulence
Event Title:10th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements
Event Location:Marbella, Spanien
Event Type:international Conference
Event Dates:17. - 19. September 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:06 Nov 2014 09:23
Last Modified:06 Nov 2014 09:23

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