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Analysis of kinetic energy spectra in oscillatory pipe flows

Feldmann, Daniel and Wagner, Claus (2013) Analysis of kinetic energy spectra in oscillatory pipe flows. ETC14, 01. - 04. Sept. 2013, Lyon, France.

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Official URL: http://etc14.ens-lyon.fr

Abstract

We present kinetic energy spectra calculated from DNS data of oscillatory pipe flows at several combinations of the Womersley Wo ϵ {13; 26; 52g} and the Reynolds Re ϵ {3000; 12000; 48000g} number. For all Wo, the mean flow oscillation frequency contains most of the energy. Besides that, we find a -5/3 energy decay in the spectra, either close to the wall but not at the pipe centre for the conditionally turbulent case or at the pipe centre and close to the wall for the turbulent case. For the laminar cases, we observe small peaks in the spectra at higher modes, indicating instabilities already known from stability analysis.

Item URL in elib:https://elib.dlr.de/80947/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of kinetic energy spectra in oscillatory pipe flows
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Feldmann, Danieldaniel.feldmann (at) dlr.deUNSPECIFIED
Wagner, Clausclaus.wagner (at) dlr.deUNSPECIFIED
Date:13 September 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-2
Series Name:Confercence Proceedings on USB-Stick
Status:Published
Keywords:Turbulent kinetic energy spectra, oscillatory pipe flow, direct numerical simulation, decay and amplification of turbulence
Event Title:ETC14
Event Location:Lyon, France
Event Type:international Conference
Event Dates:01. - 04. Sept. 2013
Organizer:Euromech
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Feldmann, Daniel
Deposited On:18 Oct 2013 10:00
Last Modified:08 May 2014 23:16

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