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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, X. Springer International Publishing Switzerland 2016. pp. 113-122. doi: 10.1007/978-3-319-27279-5_10. ISBN 978-3-319-27278-8. ISSN 1612-2909.

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Official URL: https://doi.org/10.1007/978-3-319-27279-5_10


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
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Feldmann, DanielUNSPECIFIEDhttps://orcid.org/0000-0002-6585-2875UNSPECIFIED
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 ISI Web of Science:No
Page Range:pp. 113-122
EditorsEmailEditor's ORCID iDORCID Put Code
Dillmann, AndreasDLR Göttingen, DeutschlandUNSPECIFIEDUNSPECIFIED
Heller, GerdAirbus Deutschland, Bremen, GermanyUNSPECIFIEDUNSPECIFIED
Krämer, EwaldAirbus Deutschland, BremenUNSPECIFIEDUNSPECIFIED
Wagner, ClausDLR Göttingen, DeutschlandUNSPECIFIEDUNSPECIFIED
Breitsamter, ChristianTU München, DeutschlandUNSPECIFIEDUNSPECIFIED
Publisher:Springer International Publishing Switzerland 2016
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
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:05 Nov 2020 10:16

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