Exploration of nanofluid pool boiling and deposition on a horizontal cylinder in Eulerian and Lagrangian frames

dc.contributor.authorMahdavi, Mostafa
dc.contributor.authorSharifpur, Mohsen
dc.contributor.authorMeyer, Josua P.
dc.contributor.emailmohsen.sharifpur@up.ac.zaen_ZA
dc.date.accessioned2018-05-31T07:09:57Z
dc.date.issued2018-10
dc.description.abstractIn spite of many advantages of using nanoparticles in convective heat transfer, there are still some hidden aspects of nanofluids regarding simulations. Pool boiling flows are complicated regarding analytical aspects, and the presence of particles can noticeably extend this complexity. One of the most important aspects of nanofluid pool boiling is concerned with the changes in nucleation site and bubble diameter due to particles deposition and surface roughness. To include these effects, new correlations are implemented as a user-defined function for nucleation site density and bubble departure diameter. On the other hand, the particles are introduced and tracked everywhere in the domain in the Lagrangian frame by using discrete model. As an application, a tube bundle with four tubes is considered with different orientation angles concerning each other and different pitch distances. Unsteady Eulerian two-fluid model in ANSYS-Fluent is employed to simulate the liquid and vapour flows in the computational domain. In this work, pool boiling nanofluid flow is numerically solved around a two-dimensional horizontal cylinder with 20 mm diameter and compared with experimental data. The nanofluid is consist of distilled water and aluminium oxide with a particle size of 38 nm. The good agreement is found, and further discussion regarding particles migration and deposition are presented. It is found that the percentage of deposition is dependent on heat flux and particle concentration. Also, heat transfer coefficient increases with expanding the horizontal distance between cylinders and then decreases to a fixed value.en_ZA
dc.description.departmentMechanical and Aeronautical Engineeringen_ZA
dc.description.embargo2019-10-01
dc.description.librarianhj2018en_ZA
dc.description.urihttp://www.elsevier.com/locate/ijhmten_ZA
dc.identifier.citationMahdavi, M., Sharifpur, M. & Meyer, J.P. 2018, 'Exploration of nanofluid pool boiling and deposition on a horizontal cylinder in Eulerian and Lagrangian frames', International Journal of Heat and Mass Transfer, vol. 125, pp. 959-971en_ZA
dc.identifier.issn0017-9310 (print)
dc.identifier.issn1879-2189 (online)
dc.identifier.other10.1016/j.ijheatmasstransfer.2018.04.153
dc.identifier.urihttp://hdl.handle.net/2263/65052
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2018 Elsevier Ltd. 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. 125, pp. 959-971, 2018. doi : 10.1016/j.ijheatmasstransfer.2018.04.153.en_ZA
dc.subjectPool boilingen_ZA
dc.subjectEulerian modelen_ZA
dc.subjectDiscrete modelen_ZA
dc.subjectANSYS-Fluenten_ZA
dc.subjectUser defined function (UDF)en_ZA
dc.subjectNanofluidsen_ZA
dc.subjectNanoparticlesen_ZA
dc.subject.otherEngineering, built environment and information technology articles SDG-07
dc.subject.otherSDG-07: Affordable and clean energy
dc.subject.otherEngineering, built environment and information technology articles SDG-09
dc.subject.otherSDG-09: Industry, innovation and infrastructure
dc.titleExploration of nanofluid pool boiling and deposition on a horizontal cylinder in Eulerian and Lagrangian framesen_ZA
dc.typePostprint Articleen_ZA

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