Show simple item record

dc.contributor.authorAksamit, Nikolas Olson
dc.contributor.authorHartmann, Robert
dc.contributor.authorLohse, Detlef
dc.contributor.authorHaller, George
dc.date.accessioned2023-12-20T12:39:06Z
dc.date.available2023-12-20T12:39:06Z
dc.date.issued2023-08-22
dc.description.abstractOur understanding of the material organization of complex fluid flows has benefited recently from mathematical developments in the theory of objective coherent structures. These methods have provided a wealth of approaches that identify transport barriers in three-dimensional (3-D) turbulent flows. Specifically, theoretical advances have been incorporated into numerical algorithms that extract the most influential advective, diffusive and active barriers to transport from data sets in a frame-indifferent fashion. To date, however, there has been very limited investigation into these objectively defined transport barriers in 3-D unsteady flows with complicated spatiotemporal dynamics. Similarly, no systematic comparison of advective, diffusive and active barriers has been carried out in a 3-D flow with both thermally driven and mechanically modified structures. In our study, we utilize simulations of turbulent rotating Rayleigh–Bénard convection to uncover the interplay between advective transport barriers (Lagrangian coherent structures), material barriers to diffusive heat transport, and objective Eulerian barriers to momentum transport. For a range of (inverse) Rossby numbers, we identify each type of barrier and find intriguing relationships between momentum and heat transport that can be related to changes in the relative influence of mechanical and thermal forces. Further connections between bulk behaviours and structure-specific behaviours are also developed.en_US
dc.identifier.citationAksamit, Hartmann, Lohse, Haller. Interplay between advective, diffusive and active barriers in (rotating) Rayleigh-Bénard flow. Journal of Fluid Mechanics. 2023;969en_US
dc.identifier.cristinIDFRIDAID 2189200
dc.identifier.doi10.1017/jfm.2023.563
dc.identifier.issn0022-1120
dc.identifier.issn1469-7645
dc.identifier.urihttps://hdl.handle.net/10037/32181
dc.language.isoengen_US
dc.publisherCambridge University Pressen_US
dc.relation.journalJournal of Fluid Mechanics
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/EXCELLENT SCIENCE - European Research Council/804283/EU/Direct numerical simulations towards ultimate turbulence/UltimateRB/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleInterplay between advective, diffusive and active barriers in (rotating) Rayleigh-Bénard flowen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record

Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)