Relationship between pressure drop and heat transfer of developing and fully developed flow in smooth horizontal circular tubes in the laminar, transitional, quasi-turbulent and turbulent flow regimes

dc.contributor.authorEverts, Marilize
dc.contributor.authorMeyer, Josua P.
dc.contributor.emailjosua.meyer@up.ac.zaen_ZA
dc.date.accessioned2017-11-27T07:01:18Z
dc.date.issued2018-02
dc.descriptionThis work was produced as part of a PhD in the Department of Mechanical and Aeronautical Engineering at the University of Pretoria by the first author, under the supervision of the second author. (http://hdl.handle.net/2263/44245)en_ZA
dc.description.abstractLimited work has been done specifically focussing on the relationship between pressure drop and heat transfer in the transitional flow regime. The purpose of this study was therefore to experimentally investigate and compare the pressure drop and heat transfer characteristics of developing and fully developed flow in smooth horizontal circular tubes in the laminar, transitional, quasi-turbulent and turbulent flow regimes. An experimental set-up was designed, built and validated against data from literature. A smooth circular test section with an inner diameter of 11.5 mm, and maximum length-to-diameter ratio of 872, was used. Pressure drop and heat transfer measurements were taken at Reynolds numbers between 500 and 10,000 at different heat fluxes. Water was used as the test fluid and the Prandtl number ranged between 3 and 7. A total of 317 mass flow rate measurements, 34,553 temperature measurements and 2536 pressure drop measurements were taken. Pressure drop and heat transfer measurements were taken simultaneously and the relationship between pressure drop and heat transfer was investigated. It was found that the Reynolds numbers at which transition started and ended was the same for the pressure drop and heat transfer results. Correlations were developed to determine the relationship between heat transfer and pressure drop, as well as the average Nusselt numbers, in the laminar, transitional, quasi-turbulent and turbulent flow regimes, for both developing and fully developed flow in mixed convection conditions. It was found that the relationship between heat transfer and pressure drop can be used as an additional criterion to distinguish the different flow regimes.en_ZA
dc.description.departmentMechanical and Aeronautical Engineeringen_ZA
dc.description.embargo2019-02-20
dc.description.librarianhj2017en_ZA
dc.description.sponsorshipThe NRF, Stellenbosch University/University of Pretoria Solar Hub, CSIR, EEDSM Hub, RDP and NAC.en_ZA
dc.description.urihttp://www.elsevier.com/locate/ijhmten_ZA
dc.identifier.citationEverts, Marilize | Meyer, Josua P. 2018, 'Relationship between pressure drop and heat transfer of developing and fully developed flow in smooth horizontal circular tubes in the laminar, transitional, quasi-turbulent and turbulent flow regimes', International Journal of Heat and Mass Transfer, vol. 117, pp. 1231-1250.en_ZA
dc.identifier.issn0017-9310 (print)
dc.identifier.issn1879-2189 (online)
dc.identifier.other10.1016/j.ijheatmasstransfer.2017.10.072
dc.identifier.urihttp://hdl.handle.net/2263/63355
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2017 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in International Journal of Heat and Mass Transfer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in International Journal of Heat and Mass Transfer, vol. 117, pp. 1231-1250, 2018. doi : 10.1016/j.ijheatmasstransfer.2017.10.072.en_ZA
dc.subjectMixed convectionen_ZA
dc.subjectConstant heat fluxen_ZA
dc.subjectPressure dropen_ZA
dc.subjectHeat transferen_ZA
dc.subjectQuasi-turbulent flowen_ZA
dc.subjectTransitional flowen_ZA
dc.subjectDeveloping flowen_ZA
dc.subjectPressure drop measurementen_ZA
dc.subjectMass flow rate measurementen_ZA
dc.subjectHeat transfer measurementen_ZA
dc.subjectHeat transfer characteristicsen_ZA
dc.subjectDropsen_ZA
dc.subjectTurbulent flowen_ZA
dc.subjectTemperature measurementen_ZA
dc.subjectReynolds numberen_ZA
dc.subjectPrandtl numberen_ZA
dc.subjectPipe flowen_ZA
dc.subjectHeat fluxen_ZA
dc.subjectHeat convectionen_ZA
dc.subjectFlow rateen_ZA
dc.subject.otherEngineering, built environment and information technology articles SDG-07
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dc.titleRelationship between pressure drop and heat transfer of developing and fully developed flow in smooth horizontal circular tubes in the laminar, transitional, quasi-turbulent and turbulent flow regimesen_ZA
dc.typePostprint Articleen_ZA

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