Buoyancy effects on low-Reynolds-number turbulent flow in a horizontal square duct

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dc.book.titleTurbulence, Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer - Rome, Italy, 14-18 September, 2009
dc.contributor.authorSekimoto, Atshushi
dc.contributor.authorSekiyama, K.
dc.contributor.authorKawahara, Genta
dc.contributor.authorUhlmann, Markus
dc.contributor.authorPinelli, Alfredo
dc.date.accessioned2023-06-20T13:39:40Z
dc.date.available2023-06-20T13:39:40Z
dc.date.issued2009
dc.description.abstractDirect numerical simulations of fully developed low-Reynolds-number turbulent flow in a horizontal square duct heated from below are performed at Richardson numbers 0 ≤ Ri ≤ 1.03 to investigate the buoyancy effects on the coherent structures near the walls, i.e. streamwise vortices and associated streaks, and on turbulence-driven secondary flow of Prandtl's second kind. It is found that cross-streamwise thermal convection which is represented by single large-scale circulation appears to affect the coherent structures and the mean secondary flow for Ri ≥ 0.02. As Ri is increased, the nearwall coherent structures are observed to appear more frequently in the region near one of the two corners on the wall, since they are swept along the wall towards the corner by the large-scale convection. The localization of the near-wall structures affects the profile of skin friction and heat transfer rate on the wall.
dc.description.departmentDepto. de Análisis Matemático y Matemática Aplicada
dc.description.facultyFac. de Ciencias Matemáticas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/22000
dc.identifier.doi10.1615/ICHMT.2009.TurbulHeatMassTransf.2400
dc.identifier.officialurlhttp://www.dl.begellhouse.com/pt/references/1bb331655c289a0a,79a1a64252fdbc4b,137d47c51733f5e8.html
dc.identifier.relatedurlhttp://www.dl.begellhouse.com/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/53264
dc.publisherBegell House
dc.relation.ispartofseriesICHMT Digital Library Online
dc.rights.accessRightsmetadata only access
dc.subject.cdu531
dc.subject.ucmFísica (Física)
dc.subject.unesco22 Física
dc.titleBuoyancy effects on low-Reynolds-number turbulent flow in a horizontal square duct
dc.typebook part
dspace.entity.typePublication
relation.isAuthorOfPublication2b7c93f7-c4d1-42d5-820a-333c428d96c2
relation.isAuthorOfPublication.latestForDiscovery2b7c93f7-c4d1-42d5-820a-333c428d96c2
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