Show simple item record

dc.contributor.authorGarcía Pinar, Alberto 
dc.contributor.authorVicente Quiles, Pedro Ginés 
dc.contributor.authorViedma Robles, Antonio 
dc.date.accessioned2009-01-07T12:16:50Z
dc.date.available2009-01-07T12:16:50Z
dc.date.issued2005
dc.identifier.citationGARCÍA , Alberto, VIECENTE, Pedro G., VIEDMA, Antonio. Experimental study of heat transfer enhancement with wire coil inserts in laminar-transition-turbulent regimes at different Prandtl numbers. International Journal of Heat and Mass Transfer, 48: 4640-4651, 2005. ISSN 0017-9310es
dc.identifier.issn0017-9310
dc.description.abstractHelical-wire-coils inserted in a round tube have been experimentally studied in other to obtain their thermohydraulic behaviour in laminar, transition and turbulent flows. Using water and propylene glycol mixtures at different concentrations, a wide range of flow conditions was covered: Reynolds Number from 100 to 90 000 and Prandtl number from 2.8 to 200. Six Wire coil insets were tested, with a geometric range of helical pitch 1.17 less than p/e less than 33 and helix angle 30º less than infinity less than 53º. Wire coils were tightly attached to the inner tube surface. Experimental correlations of Fanning friction factor and Nusselt number as functions of flow and dimensionaless geometric parameters are proposed. Results show that wire colis increse pressure drop up to 8 times and heat transfer up to 4 times compared to the empty smooth tube. Moreover these insert devices accelerate transition to critical Reynolds numbers down to 700. Transition to turbulent flow occurs softly without unstabilities in flow, due to the swirl flow induced by the wires.es
dc.formatapplication/pdf
dc.language.isoenges
dc.publisherElsevier Sciencees
dc.rightsCopyright © 2008 Elsevier B.V.es
dc.rightsVersión del editor: http://www.sciencedirect.com/ http://dx.doi.org/10.1016/j.ijheatmasstransfer.2005.04.024
dc.titleExperimental investigation on heat transfer and frictional characteristics of wire coils inserts in transition flows at different Prandtl numberes
dc.typeinfo:eu-repo/semantics/articlees
dc.subject.otherMecánica de Fluidoses
dc.subjectTermohidráulicaes
dc.subjectNúmero de Reynoldses
dc.subjectTurbulencias inducidas por corrienteses
dc.subjectNúmero Prandtles
dc.subjectTransferencia de calores
dc.subjectThermohydraulics
dc.subjectTurbulent flows
dc.subjectReynolds number
dc.subjectTurbulence induced currents
dc.subjectPrandtl number
dc.subjectHeat transfer
dc.subjectFlujos turbulentos
dc.identifier.urihttp://hdl.handle.net/10317/606


Files in this item

This item appears in the following Collection(s)

Show simple item record