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The flow around a surface mounted cube: a characterization by time-resolved PIV, 3D Shake-The-Box and LBM simulation

Schröder, Andreas and Willert, Christian and Schanz, Daniel and Geisler, Reinhard and Jahn, Tobias and Gallas, Quentin and Leclaire, Benjamin (2020) The flow around a surface mounted cube: a characterization by time-resolved PIV, 3D Shake-The-Box and LBM simulation. Experiments in Fluids, 61 (189), pp. 1-22. Springer. doi: 10.1007/s00348-020-03014-5. ISSN 0723-4864.

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Official URL: https://doi.org/10.1007/s00348-020-03014-5

Abstract

The flow around a surface mounted cube with incoming turbulent or laminar boundary layer has been topic of many experimental and numerical investigations in the past decades. Despite its simple geometry the flow generates a set of complex vortical structures in front and around the cube, includes flow separation at the three front plane edges with corresponding subsequent shear layer dynamics enveloping recirculation zones. Downstream of the cube a large unsteady flow separation region is present which is associated with typical quasi-periodic bluff-body wake dynamics. Therefore the flow configuration is well suited to enhance the understanding of similar unsteady and separated flow phenomena in many aerodynamic and engineering applications. In the present experimental investigation we aim at resolving a large spectrum of spatial and temporal scales in the flow around a cube with incoming laminar and turbulent boundary layers by using the most recent developments of dense 3D Lagrangian particle tracking (LPT) and high resolution TR-PIV for Reynolds numbers based on cube size in the range Re_H = 2000 - 8000. The results documented in the present paper consist of snapshots and the analysis of long time-series of highly resolved 3D and 2D velocity fields suited to enhance the understanding of coherent structure dynamics and of corresponding statistical Lagrangian and Eulerian flow properties. Premultiplied velocity spectra and 3D pressure distributions are calculated and discussed as well. Finally, the measurement data is compared to results obtained with a simulation based on the lattice Boltzmann method (LBM).

Item URL in elib:https://elib.dlr.de/136606/
Document Type:Article
Title:The flow around a surface mounted cube: a characterization by time-resolved PIV, 3D Shake-The-Box and LBM simulation
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schröder, AndreasAndreas.Schroeder (at) dlr.dehttps://orcid.org/0000-0002-6971-9262
Willert, ChristianChris.Willert (at) dlr.dehttps://orcid.org/0000-0002-1668-0181
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Geisler, ReinhardReinhard.Geisler (at) dlr.deUNSPECIFIED
Jahn, Tobiastobias.jahn (at) dlr.deUNSPECIFIED
Gallas, Quentinquentin.gallas (at) onera.frUNSPECIFIED
Leclaire, Benjaminbenjamin.leclaire (at) onera.frUNSPECIFIED
Date:9 August 2020
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:61
DOI :10.1007/s00348-020-03014-5
Page Range:pp. 1-22
Publisher:Springer
Series Name:Springer Nature
ISSN:0723-4864
Status:Published
Keywords:boundary layer, wall-attached cube, separated flow, transition, Lagrangian particle tracking, particle image velocimetry, lattice Boltzmann method
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 (old), L - Virtual Engine and Validation methods (old)
Location: Göttingen , Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Micknaus, Ilka
Deposited On:19 Oct 2020 14:41
Last Modified:19 Oct 2020 14:41

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