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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/60848
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dc.creatorHugo Demattos Nogueirapt_BR
dc.creatorGustavo Andres Guerrero Erasopt_BR
dc.creatorPiotr Krzysztof Smolarkiewiczpt_BR
dc.creatorAlexander G. Kosovichevpt_BR
dc.date.accessioned2023-11-13T12:16:55Z-
dc.date.available2023-11-13T12:16:55Z-
dc.date.issued2022-
dc.citation.volume928pt_BR
dc.citation.issue2pt_BR
dc.citation.spage1pt_BR
dc.citation.epage12pt_BR
dc.identifier.doihttps://doi.org/10.3847/1538-4357/ac54b7pt_BR
dc.identifier.issn1538-4357pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/60848-
dc.description.resumoLarge-eddy simulations (LES) and implicit LES (ILES) are wise and affordable alternatives to the unfeasible direct numerical simulations of turbulent flows at high Reynolds (Re) numbers. However, for systems with few observational constraints, it is a formidable challenge to determine if these strategies adequately capture the physics of the system. Here, we address this problem by analyzing numerical convergence of ILES of turbulent convection in 2D, with resolutions between 642 and 20482 grid points, along with the estimation of their effective viscosities, resulting in effective Reynolds numbers between 1 and ∼104. The thermodynamic structure of our model resembles the solar interior, including a fraction of the radiative zone and the convection zone. In the convective layer, the ILES solutions converge for the simulations with ≥5122 grid points, as evidenced by the integral properties of the flow and its power spectra. Most importantly, we found that even a resolution of 1282 grid points, $\mathrm{Re}\,\sim \,10$, is sufficient to capture the dynamics of the large scales accurately. This is a consequence of the ILES method allowing the energy contained in these scales to be the same in simulations with low and high resolution. Special attention is needed in regions with a small density scale height driving the formation of fine structures unresolved by the numerical grid. In the stable layer, we found the excitation of internal gravity waves, yet high resolution is needed to capture their development and interaction.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofThe Astrophysical Journal-
dc.rightsAcesso Abertopt_BR
dc.subjectSolar convective zonept_BR
dc.subjectHydrodynamical simulationspt_BR
dc.subjectComputational methodspt_BR
dc.subject.otherSolpt_BR
dc.subject.otherMétodo computacionalpt_BR
dc.titleNumerical convergence of 2D solar convection in Implicit Large-eddy Simulationspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://iopscience.iop.org/article/10.3847/1538-4357/ac54b7pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-2671-8796pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7077-3285pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0364-4883pt_BR
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