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.date.accessioned2024-06-01T06:10:50Z
dc.date.available2024-06-01T06:10:50Z
dc.date.issued2024
dc.description.abstract© 2024 Elsevier LtdA 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.description.volume206
dc.identifier.doi10.1016/j.anucene.2024.110612
dc.identifier.issnNone
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/38721
dc.relation.ispartofAnnals of Nuclear Energy
dc.rightsAcesso Restrito
dc.subject.otherlanguagek – ɛ model
dc.subject.otherlanguageNatural circulation loop
dc.subject.otherlanguageNatural convection
dc.subject.otherlanguageNumerical simulation
dc.subject.otherlanguageSpatial discretization
dc.subject.otherlanguageTemporal discretization
dc.subject.otherlanguageTransient flow analysis
dc.subject.otherlanguageTurbulence model benchmarking
dc.subject.otherlanguageVerification and validation
dc.titleVerification and validation of seven turbulence models for a natural circulation loop under transient conditions
dc.typeArtigo
local.scopus.citations0
local.scopus.eid2-s2.0-85193573912
local.scopus.subjectFlow analysis
local.scopus.subjectK – ɛ model
local.scopus.subjectModel benchmarking
local.scopus.subjectNatural-Circulation Loop
local.scopus.subjectSpatial discretizations
local.scopus.subjectTemporal discretization
local.scopus.subjectTransient flow
local.scopus.subjectTransient flow analyse
local.scopus.subjectTurbulence model benchmarking
local.scopus.subjectVerification-and-validation
local.scopus.updated2025-04-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85193573912&origin=inward
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