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dc.contributor.authorRodríguez Pérez, Ivette María
dc.contributor.authorLehmkuhl Barba, Oriol
dc.contributor.authorSoria Guerrero, Manel
dc.contributor.authorGómez, Samuel
dc.contributor.authorDomínguez Pumar, Manuel
dc.contributor.authorKowalski, Lukasz
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.date.accessioned2020-07-01T08:53:01Z
dc.date.available2021-04-01T00:26:10Z
dc.date.issued2019-04
dc.identifier.citationRodriguez, I. [et al.]. Fluid dynamics and heat transfer in the wake of a sphere. "International journal of heat and fluid flow", Abril 2019, vol. 76, núm. April, p. 141-153.
dc.identifier.issn0142-727X
dc.identifier.urihttp://hdl.handle.net/2117/192086
dc.description.abstractDirect numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. Measurements of the local and average Nusselt number are performed and compared with literature available experimental results. Average and front stagnation point Nusselt numbers increase with the Reynolds number, while the minimum value moves towards the sphere apex as the flow enters the sub-critical regime. Differences in both viscous and thermal boundary layers are observed, while the shape factor at Reynolds number $Re=10^4$ behaves similarly to that observed in circular cylinders at comparable Reynolds numbers. It is shown that as the Reynolds number increases, the increase in turbulent kinetic energy promotes the entrainment of irrotational flow thus enhancing the temperature mixing in the zone. The near wake, between $5\leq x/D\leq15$, spreads at a faster rate at $Re=1000$ with a slope close to $x/D^{1/2}$, while at $Re=10^4$ it follows a trend close to $x/D^{1/3}$.
dc.format.extent13 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subject.classificationEnergy transfer
dc.subject.lcshFluid dynamics
dc.subject.lcshBoundary layer
dc.subject.lcshKinematics
dc.subject.lcshTransferència d'energia
dc.subject.otherAxisymmetric wakes
dc.subject.otherSphere
dc.subject.otherHeat transfer
dc.subject.otherLES
dc.subject.otherDNS
dc.titleFluid dynamics and heat transfer in the wake of a sphere
dc.typeArticle
dc.subject.lemacDinàmica de fluids
dc.subject.lemacCapa límit (Dinàmica de fluids)
dc.subject.lemacCinemàtica
dc.contributor.groupUniversitat Politècnica de Catalunya. TUAREG - Turbulence and Aerodynamics in Mechanical and Aerospace Engineering Research Group
dc.contributor.groupUniversitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies
dc.identifier.doi10.1016/j.ijheatfluidflow.2019.02.004
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0142727X18302583
dc.rights.accessOpen Access
local.identifier.drac23924493
dc.description.versionPostprint (published version)
local.citation.authorRodriguez, I.; Lehmkuhl, O.; Soria, M.; Gómez, S.; Dominguez, M.; Kowalski, L.
local.citation.publicationNameInternational journal of heat and fluid flow
local.citation.volume76
local.citation.numberApril
local.citation.startingPage141
local.citation.endingPage153


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