Resolved turbulence characteristics in large-eddy simulations nested within mesoscale simulations using the weather research and forecasting model

dc.contributor.authorKirkil, Gökhan
dc.contributor.authorKosovic, Branko
dc.contributor.authorKirkil, Gökhan
dc.date.accessioned2019-06-28T11:10:54Z
dc.date.available2019-06-28T11:10:54Z
dc.date.issued2014
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Endüstri Mühendisliği Bölümüen_US
dc.description.abstractOne-way concurrent nesting within the Weather Research and Forecasting Model (WRF) is examined for conducting large-eddy simulations (LES) nested within mesoscale simulations. Wind speed spectra and resolved turbulent stresses and turbulence kinetic energy from the nested LES are compared with data from nonnested simulations using periodic lateral boundary conditions. Six different subfilter-scale (SFS) stress models are evaluated using two different nesting strategies under geostrophically forced flow over both flat and hilly terrain. Neutral and weakly convective conditions are examined. For neutral flow over flat terrain turbulence appears on the nested LES domains only when using the two dynamic SFS stress models. The addition of small hills and valleys (wavelengths of 2.4 km and maximum slopes of ±10°) yields small improvements with all six models producing some turbulence on nested domains. Weak convection (surface heat fluxes of 10 Wm-2) further accelerates the development of turbulence on all nested domains. However considerable differences in key parameters are observed between the nested LES domains and their nonnested counterparts. Nesting of a finer LES within a coarser LES provides superior results to using only one nested LES domain. Adding temperature and velocity perturbations near the inlet planes of nested domains shows promise as an easy-to-implement method to accelerate turbulence generation and improve its accuracy on nested domains. © 2014 American Meteorological Society.en_US]
dc.identifier.citation93
dc.identifier.doi10.1175/MWR-D-13-00064.1en_US
dc.identifier.endpage831
dc.identifier.issn0027-0644en_US
dc.identifier.issn0027-0644
dc.identifier.issue2
dc.identifier.scopus2-s2.0-84893863279en_US
dc.identifier.scopusqualityN/A
dc.identifier.startpage806en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12469/1364
dc.identifier.urihttps://doi.org/10.1175/MWR-D-13-00064.1
dc.identifier.volume142en_US
dc.identifier.wosqualityQ2
dc.institutionauthorKirkil, Gökhanen_US
dc.language.isoenen_US
dc.relation.journalMonthly Weather Reviewen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.titleResolved turbulence characteristics in large-eddy simulations nested within mesoscale simulations using the weather research and forecasting modelen_US
dc.typeArticleen_US
dspace.entity.typePublication
relation.isAuthorOfPublicationc777ed76-9b8f-43f2-a3b0-0222883181af
relation.isAuthorOfPublication.latestForDiscoveryc777ed76-9b8f-43f2-a3b0-0222883181af

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