Bauer, Christian und Wagner, Claus (2021) The Largest Scales in Turbulent Pipe FLow. In: High Performance Computing in Science and Engineering – Garching/Munich 2020 Leibniz-Rechenzentrum (LRZ). Seiten 148-149. ISBN 978-3-9816675-4-7.
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Kurzfassung
A large amount of the energy needed to push fluids through pipes worldwide is dissipated by viscous turbulence in the vicinity of solid walls. Therefore the study of wallbounded turbulent flows is not only of theoretical interest but also of practical importance for many engineering applications. In wallbounded turbulence the energy of the turbulent fluctuations is distributed among different scales. The largest energetic scales are denoted as superstructures or verylargescale motions (VLSMs). In our project we carry out direct numerical simulations (DNSs) of turbulent pipe flow aiming at the understanding of the energy exchange between VLSMs and the smallscale coherent structures. While the nearwall smallscale structures scale in viscous units, the outer flow VLSMs scale in bulk units. Hence the range of scales increases as the Reynolds number of the flow increases. In order to study the interaction between these structures, we carried out DNSs of friction Reynolds numbers up to ReΤ=2,880, where ReΤ=uΤR/ν is based on the friction velocity, the pipe radius and the kinematic viscosity. Besides a large Reynolds number, required for large scale separation, a sufficiently long computational domain is needed for VLSMs to settle. In a preliminary study the required computational domain length was estimated to L=42R.
elib-URL des Eintrags: | https://elib.dlr.de/142187/ | ||||||||||||||||||||||||
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Dokumentart: | Beitrag im Sammelband | ||||||||||||||||||||||||
Titel: | The Largest Scales in Turbulent Pipe FLow | ||||||||||||||||||||||||
Autoren: |
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Datum: | Mai 2021 | ||||||||||||||||||||||||
Erschienen in: | High Performance Computing in Science and Engineering – Garching/Munich 2020 | ||||||||||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||
Seitenbereich: | Seiten 148-149 | ||||||||||||||||||||||||
Herausgeber: |
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Verlag: | Leibniz-Rechenzentrum (LRZ) | ||||||||||||||||||||||||
ISBN: | 978-3-9816675-4-7 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | Turbulent Pipe Flow, Direct Numerical Simulation, High Performance Computing | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Verkehr | ||||||||||||||||||||||||
HGF - Programmthema: | Schienenverkehr | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | V SC Schienenverkehr | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | V - NGT BIT (alt) | ||||||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Bodengebundene Fahrzeuge | ||||||||||||||||||||||||
Hinterlegt von: | Bauer, Christian | ||||||||||||||||||||||||
Hinterlegt am: | 17 Mai 2021 17:00 | ||||||||||||||||||||||||
Letzte Änderung: | 18 Mai 2021 21:20 |
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