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dc.contributor.authorElguernaoui, Omar
dc.contributor.authorReuder, Joachim
dc.contributor.authorLi, Dan
dc.contributor.authorMaronga, Bjørn
dc.contributor.authorBakhoday Paskyabi, Mostafa
dc.contributor.authorWolf, Tobias
dc.contributor.authorEsau, Igor
dc.date.accessioned2023-08-30T12:03:10Z
dc.date.available2023-08-30T12:03:10Z
dc.date.issued2023-06-21
dc.description.abstractThis study analyses the departure of the velocity-variances profiles from their quasi-steady state described by the mixed-layer similarity, using large-eddy simulations with different prescribed shapes and time scales of the surface kinematic heat flux decay. Within the descriptive frames where the time is tracked solely by the forcing time scale (either constant or time-dependent) describing the surface heat flux decay, we find that the normalized velocityvariances profiles from different runs do not collapse while they depart from mixed-layer similarity. As the mixed-layer similarity relies on the assumption that the free-convective boundary layer is in a quasi-equilibrium, we consider the ratios of the forcing time scales to the convective eddy-turnover time scale. We find that the normalized velocity-variances profiles collapse in the only case where the ratio (r) of the time-dependent forcing time scale to the convective eddy-turnover time scale is used for tracking the time, supporting the independence of the departure from the characteristics of the surface heat flux decay. As a consequence of this result, the knowledge of r is sufficient to predict the departure of the velocity variances from their quasi-steady state, irrespective of the shape of the surface heat flux decay. This study highlights the importance of considering both the time-dependent forcing time scale and the convective eddy-turnover time scale for evaluating the response of the free-convective boundary layer to the surface heat flux decay.en_US
dc.identifier.citationElguernaoui, Reuder, Li, Maronga, Bakhoday Paskyabi, Wolf, Esau. The Departure from Mixed-Layer Similarity During the Afternoon Decay of Turbulence in the Free-Convective Boundary Layer: Results from Large-Eddy Simulations. Boundary-Layer Meteorology. 2023;188:259-284en_US
dc.identifier.cristinIDFRIDAID 2161724
dc.identifier.doi10.1007/s10546-023-00812-2
dc.identifier.issn0006-8314
dc.identifier.issn1573-1472
dc.identifier.urihttps://hdl.handle.net/10037/30559
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.relation.journalBoundary-Layer Meteorology
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.titleThe Departure from Mixed-Layer Similarity During the Afternoon Decay of Turbulence in the Free-Convective Boundary Layer: Results from Large-Eddy Simulationsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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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)