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On Phase Asymmetries in Oscillatory Pipe Flow

Feldmann, Daniel and Wagner, Claus (2016) On Phase Asymmetries in Oscillatory Pipe Flow. In: New Results in Numerical and Experimental Fluid Mechanics X Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing Switzerland 2016. pp. 113-122. ISBN 978-3-319-27278-8. ISSN 1612-2909

Full text not available from this repository.

Official URL: http://www.springer.com/de/book/9783319272788

Abstract

We present results from direct numerical simulations (DNS) of oscillatory pipe flow at several dimensionless frequencies Wo ∈ {6.5,13,26} and one fixed shear Reynolds number Ret = 1440. Starting from a fully-developed turbulent velocity field at that Ret , the oscillatory flow either relaminarises or reaches a conditionally turbulent or strongly asymmetric state depending on Wo. The numerical method is validated by demonstrating excellent agreement of our DNS results with experimental data and analytical predictions from literature for the limiting cases of non-oscillating but turbulent and oscillating but laminar pipe flow. For an oscillating turbulent pipe flow we further found a very good agreement between qualitative descriptions of the characteristic flow features observed in experiments and our DNS. Here, we focus on the observation of a strongly asymmetric behaviour between the positive and the negative half-cycles of the oscillatory pipe flow at Wo = 6.5.

Item URL in elib:https://elib.dlr.de/93182/
Document Type:Contribution to a Collection
Additional Information:ISBN online : 978-3-319-27279-5 ISSN elektronisch: 1860-0824
Title:On Phase Asymmetries in Oscillatory Pipe Flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Feldmann, Danieldaniel.feldmann (at) dlr.dehttps://orcid.org/0000-0002-6585-2875
Wagner, Clausclaus.wagner (at) dlr.deUNSPECIFIED
Date:29 March 2016
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics X
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1007/978-3-319-27279-5_10
Page Range:pp. 113-122
Editors:
EditorsEmail
Dillmann, AndreasDLR Göttingen, Deutschland
Heller, GerdAirbus Deutschland, Bremen, Germany
Krämer, EwaldAirbus Deutschland, Bremen
Wagner, ClausDLR Göttingen, Deutschland
Breitsamer, ChristianTU München, Deutschland
Publisher:Springer International Publishing Switzerland 2016
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-319-27278-8
Status:Published
Keywords:Oscillatory pipe flow, Turbulence, Direct numerical simulation (DNS)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Bachmann, Barbara
Deposited On:14 Jun 2016 13:02
Last Modified:22 Jan 2018 16:50

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