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Analysis of the Energy Budget of the Largest Scales in Turbulent Pipe Flow

Bauer, Christian and Wagner, Claus (2019) Analysis of the Energy Budget of the Largest Scales in Turbulent Pipe Flow. In: Springer Proceedings in Physics, 226, pp. 113-118. Springer Science and Business Media, LLC. Interdisciplinary Turbulence Initiative (iTi 2018), 05.-07. Sep. 2018, Bertinoro, Italien. DOI: 10.1007/978-3-030-22196-6_18 ISBN 978-303022195-9 ISSN 0930-8989

Full text not available from this repository.

Official URL: https://doi.org/10.1007/978-3-030-22196-6_18

Abstract

Very-large-scale motions (VLSM) in turbulent pipe flow become increasingly energetic with higher Reynolds numbers and contribute significantly to the turbulent kinetic energy budget. Although several investigations regarding energy mechanisms in wall-bounded turbulence were carried out in the past, the origin of the energy at the largest wavelengths has not been studied rigorously, yet. Consequently, we analysed the budget equation of the filtered streamwise velocity field with very large filter lengths to identify energy sources and sinks related to VLSM. While there was no inverse energy cascade found towards VLSM on average, conditional sampling revealed an inverse energy cascade related to low-speed structures, whereas high-speed structures were subject to a forward cascade. This behaviour is at odds with the mechanism relevant for the near-wall small-scale motions, where the inverse cascade correlates with high-speed fluid.

Item URL in elib:https://elib.dlr.de/127562/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Print ISBN 978-3-030-22195-9 Online ISBN 978-3-030-22196-6
Title:Analysis of the Energy Budget of the Largest Scales in Turbulent Pipe Flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bauer, ChristianChristian.Bauer (at) dlr.dehttps://orcid.org/0000-0003-1838-6194
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:28 August 2019
Journal or Publication Title:Springer Proceedings in Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:226
DOI :10.1007/978-3-030-22196-6_18
Page Range:pp. 113-118
Editors:
EditorsEmail
Orlu, R.UNSPECIFIED
Talamelli, A.UNSPECIFIED
Peinke, J.UNSPECIFIED
Oberlack, M.UNSPECIFIED
Publisher:Springer Science and Business Media, LLC
Series Name:Progress in Turbulence VIII
ISSN:0930-8989
ISBN:978-303022195-9
Status:Published
Keywords:Turbulent Pipe Flow, DNS, Energy Flux, VLSM
Event Title:Interdisciplinary Turbulence Initiative (iTi 2018)
Event Location:Bertinoro, Italien
Event Type:international Conference
Event Dates:05.-07. Sep. 2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Rail Transport
DLR - Research area:Transport
DLR - Program:V SC Schienenverkehr
DLR - Research theme (Project):V - NGT BIT
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Bauer, Christian
Deposited On:13 Nov 2019 18:36
Last Modified:13 Nov 2019 18:53

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