Verification and validation of seven turbulence models for a natural circulation loop under transient conditions

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dc.contributor.authorANGELO, G.
dc.contributor.authorANGELO, E.
dc.contributor.authorSCURO, N.L.
dc.contributor.authorTORRES, W.M.
dc.contributor.authorANDRADE, D.A.
dc.coverageInternacional
dc.date.accessioned2024-06-10T19:47:17Z
dc.date.available2024-06-10T19:47:17Z
dc.date.issued2024
dc.description.abstractA numerical study of the vertical heater, vertical cooler (VHVC) natural circulation loop (NCL) at IPEN/CNEN-SP was conducted using a three-dimensional and transient mathematical model analyzed with the commercial software ANSYS CFX. The study focused on the stable and single-phase flow regime, with a Rayleigh number ranging from zero to 2.8×108. Seven turbulence models have been benchmarked: Zero Equation, Eddy Viscosity Transport Equation (EVTE), k−ω, k−ɛ, Shear Stress Transport (SST), Reynolds Stress (SSG), and Detached Eddy Simulation (DES). The results of these models were compared against each other and against experimental results obtained specifically for this purpose, focusing on the spatial distribution and temporal evolution of temperature at various points in the natural circulation loop. Among all tested models, the k−ɛ model demonstrated superior performance with the lowest average deviation, exhibiting lower initial turbulence production and buoyancy effects than the more complex models. This behavior suggests that the k−ɛ model is more accurate in predicting temperature distribution and is a better choice for transient flow analysis in natural circulation loops with similar geometries to those presented in this study.
dc.format.extent1-22
dc.identifier.citationANGELO, G.; ANGELO, E.; SCURO, N.L.; TORRES, W.M.; ANDRADE, D.A. Verification and validation of seven turbulence models for a natural circulation loop under transient conditions. <b>Annals of Nuclear Energy</b>, v. 206, p. 1-22, 2024. DOI: <a href="https://dx.doi.org/10.1016/j.anucene.2024.110612">10.1016/j.anucene.2024.110612</a>. Disponível em: https://repositorio.ipen.br/handle/123456789/48061.
dc.identifier.doi10.1016/j.anucene.2024.110612
dc.identifier.issn0306-4549
dc.identifier.orcidhttps://orcid.org/0000-0002-6689-3011
dc.identifier.percentilfi78.8
dc.identifier.percentilfiCiteScore77.00
dc.identifier.urihttps://repositorio.ipen.br/handle/123456789/48061
dc.identifier.vol206
dc.relation.ispartofAnnals of Nuclear Energy
dc.rightsopenAccess
dc.subjecttransients
dc.subjectturbulent flow
dc.subjectnumerical data
dc.subjectsimulation
dc.subjectnatural convection
dc.subjectturbulence
dc.subjectbenchmarks
dc.subjectvalidation
dc.subjectverification
dc.titleVerification and validation of seven turbulence models for a natural circulation loop under transient conditions
dc.typeArtigo de periódico
dspace.entity.typePublication
ipen.autorGABRIEL ANGELO
ipen.autorNIKOLAS LYMBERIS SCURO
ipen.autorWALMIR MAXIMO TORRES
ipen.autorDELVONEI ALVES DE ANDRADE
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ipen.contributor.ipenauthorGABRIEL ANGELO
ipen.contributor.ipenauthorNIKOLAS LYMBERIS SCURO
ipen.contributor.ipenauthorWALMIR MAXIMO TORRES
ipen.contributor.ipenauthorDELVONEI ALVES DE ANDRADE
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sigepi.autor.atividadeGABRIEL ANGELO:8770:420:S
sigepi.autor.atividadeNIKOLAS LYMBERIS SCURO:14552:420:N
sigepi.autor.atividadeWALMIR MAXIMO TORRES:188:420:N
sigepi.autor.atividadeDELVONEI ALVES DE ANDRADE:1258:420:N
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