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Reynolds Stress Anisotropy in Self-Preserving Turbulent Shear Flows

Eisfeld, Bernhard (2017) Reynolds Stress Anisotropy in Self-Preserving Turbulent Shear Flows. DLR-Interner Bericht. DLR-IB-AS-BS-2017-106, 158 S.

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Abstract

It is theoretically shown that all turbulent shear flows governed by the boundary layer equations that exhibit self-preserving properties contain a layer, in which the Reynolds stress anisotropies are constant. Experimental data of several such flows are analysed, proving the existence of such a layer. The corresponding Reynolds stress anisotropies are inferred, deviating between the different flows. In particular, the shear stress anisotropy differs from the value in boundary layers according to the Bradshaw hypothesis, explaining the ``round-jet/plane-jet anomaly'' as well as the prediction of delayed re-attachment by models that are calibrated to boundary layer conditions. Requirements for the improvement of current RANS models are derived.

Item URL in elib:https://elib.dlr.de/113887/
Document Type:Monograph (DLR-Interner Bericht)
Title:Reynolds Stress Anisotropy in Self-Preserving Turbulent Shear Flows
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Eisfeld, Bernhardbernhard.eisfeld (at) dlr.deUNSPECIFIED
Date:June 2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:158
ISSN:1614-7790
Status:Published
Keywords:Turbulence, shear flow, self-preservation, Reynolds stress anisotropy
Institution:DLR
Department:Institute of Aerodynamics and Flow Technology
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 - VicToria
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology
Deposited By: Eisfeld, Dr.-Ing. Bernhard
Deposited On:23 Nov 2017 10:16
Last Modified:23 Nov 2017 10:16

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