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Shake-The-Box - Dense 3D Lagrangian particle tracking for turbulence research

Schröder, Andreas and Schanz, Daniel and Gesemann, Sebastian and Novara, Matteo and Huhn, Florian and Geisler, Reinhard and Jahn, Tobias (2017) Shake-The-Box - Dense 3D Lagrangian particle tracking for turbulence research. Tec 21 Winter School Université Grenoble, 15.-20. Jan. 2017, Grenoble, Frankreich.

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Abstract

hake-The-Box (STB) is a novel time-resolved 3D Lagrangian particle tracking method for densely seeded flows. The STB algorithm has been developed at DLR Göttingen in the past three years and uses the prediction of 3D particle distributions for each subsequent time-step as a mean to seize the temporal domain for accurate track reconstructions based on time series of particle images from few camera projections. Exploiting the temporal information enables the processing of densely seeded flows (up to and beyond 0.1 particles per pixel with a nearly complete suppression of ghost particles). Such high particle trajectory densities are a necessary precondition for interpolating the corresponding time­resolved 3D velocity vector field onto a regular grid using Navier-Stokes-constraints. Such a non-linear data assimilation method named FlowFit has been developed at our group in parallel to STB and tested already successfully: For example, unsteady 3D pressure distributions have been calculated from interpolated 3D acceleration fields. The STB method has been applied to wall bounded turbulence in air and water and to a m3-scale experiment using Helium-Filled-Soap-Bubbles (HFSB) as tracers. The results demonstrate that with STB valuable data for turbulence characterization with outstanding temporal and spatial resolution especially in (wall bounded) shear flow can be obtained.

Item URL in elib:https://elib.dlr.de/118625/
Document Type:Conference or Workshop Item (Speech)
Additional Information:TEC21 1st Winter School on Multi-scale modeling and multi-physics couplings in solid and fluid mechanics Grenoble, January 20, 2017
Title:Shake-The-Box - Dense 3D Lagrangian particle tracking for turbulence research
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schröder, AndreasAndreas.Schroeder (at) dlr.deUNSPECIFIED
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Gesemann, Sebastiansebastian.gesemann (at) dlr.deUNSPECIFIED
Novara, Matteomatteo.novara (at) dlr.deUNSPECIFIED
Huhn, FlorianFlorian.Huhn (at) dlr.deUNSPECIFIED
Geisler, ReinhardReinhard.Geisler (at) dlr.deUNSPECIFIED
Jahn, TobiasUNSPECIFIEDUNSPECIFIED
Date:2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Shake-The-Box, Lagrangian Particle Tracking, Turbulence
Event Title:Tec 21 Winter School Université Grenoble
Event Location:Grenoble, Frankreich
Event Type:Workshop
Event Dates:15.-20. Jan. 2017
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 for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Bachmann, Barbara
Deposited On:31 Jan 2018 11:43
Last Modified:31 Jul 2019 20:16

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