Show simple item record

dc.contributor.authorKarimzadehkhouei, M.
dc.contributor.authorYalçın, S. E.
dc.contributor.authorŞendur, K.
dc.contributor.authorMengüç, Mustafa Pınar
dc.contributor.authorKoşar, A.
dc.date.accessioned2015-10-28T07:46:10Z
dc.date.available2015-10-28T07:46:10Z
dc.date.issued2015-10
dc.identifier.issn0894-1777
dc.identifier.urihttp://hdl.handle.net/10679/990
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0894177714002556
dc.descriptionDue to copyright restrictions, the access to the full text of this article is only available via subscription.en_US
dc.description.abstractThis study presents pressure drop and heat transfer characteristics of water based nanofluids with TiO2 and Al2O3 nanoparticles of various mass fractions in horizontal smooth hypodermic microtubes with an outer diameter of ∼717 μm and an inner diameter of ∼502 μm over a wide variety of Reynolds numbers under hydrodynamically fully developed and thermally developing conditions. For this purpose, TiO2 and Al2O3 nanoparticles of 20 nm average solid diameters were added to deionized water to prepare nanofluids with mass fractions of 0.01–3 wt.%, and prepared nanofluids were characterized by standard methods such as Dynamic Light Scattering (DLS), Scanning Electron Microscopy (SEM), and zeta potential measurements. Experimental friction factor coefficients were predicted within ±10% and are in good agreement with existing analytical predictions, while experimental heat transfer coefficients were predicted within ±15% with existing correlations for single phase flow. Our results show that there is no considerable heat transfer enhancement for Re < 1000. A consistent enhancement in heat transfer was observed (for average heat transfer coefficient up to 25%), once Reynolds number goes beyond 1500. At low Reynolds numbers, flow is mainly laminar. However, at higher Reynolds numbers, flow starts to transition to turbulent flow, when heat transfer enhancement is also observed. Under these conditions, the enhancement in heat transfer increases with mass fraction.en_US
dc.description.sponsorshipTÜBİTAK ; SUNUM ; FENS
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relationinfo:turkey/grantAgreement/TUBITAK/112M875en_US
dc.relation.ispartofExperimental Thermal and Fluid Science
dc.rightsrestrictedAccess
dc.titlePressure drop and heat transfer characteristics of nanofluids in horizontal microtubes under thermally developing flow conditionsen_US
dc.typeArticleen_US
dc.peerreviewedyesen_US
dc.publicationstatuspublisheden_US
dc.contributor.departmentÖzyeğin University
dc.contributor.authorID141825
dc.contributor.ozuauthorMengüç, Mustafa Pınar
dc.identifier.volume67
dc.identifier.startpage37
dc.identifier.endpage47
dc.identifier.wosWOS:000357223800008
dc.identifier.doi10.1016/j.expthermflusci.2014.10.013
dc.subject.keywordsNanoparticleen_US
dc.subject.keywordsNanofluiden_US
dc.subject.keywordsSingle-phase flowen_US
dc.subject.keywordsFriction factoren_US
dc.subject.keywordsHeat transfer coefficienten_US
dc.identifier.scopusSCOPUS:2-s2.0-84937788487


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record


Share this page