Lagrangian Coherent Sets as transport barriers in convection

Publikation: Beiträge in ZeitschriftenKonferenz-Abstracts in FachzeitschriftenForschung

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The analysis of the turbulent heat transfer in thermal convection flow is mostly done in the Eulerian frame of reference. Here, we use an ensemble of more than half a million individual Lagrangian tracer trajectories, which are advected together with the evolving turbulent flow, to identify subsets that contribute least to the heat transfer. These trajectories probe Lagrangian Coherent Sets — sets that remain spatially connected for a finite time and evolve in time. The analysis is based on three-dimensional direct numerical simulations at three different Prandtl numbers. Our Lagrangian analysis results provide a complementary view on the transport and are found to be consistent with the standard Eulerian results.
OriginalspracheEnglisch
AufsatznummerF16.00009
ZeitschriftBulletin of the American Physical Society
Jahrgang65
Ausgabenummer13
Anzahl der Seiten1
ISSN0003-0503
PublikationsstatusErschienen - 2020
Veranstaltung73rd Annual Meeting of the APS Division of Fluid Dynamics - 2021 - Chicago, USA / Vereinigte Staaten
Dauer: 22.11.202024.11.2020
Konferenznummer: 73

Bibliographische Notiz

Titel d. Ausgabe: 73rd Annual Meeting of the APS Division of Fluid Dynamics ; Virtual, CT (Chicago time)

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