Theoretical study of variable viscosity nanofluids flow in microchannels

Simple item page
dc.contributor.advisorMakinde, Oluwole Danielen_ZA
dc.contributor.authorMonaledi, Ramotjakien_ZA
dc.contributor.otherStellenbosch University. Faculty of Science. Dept. of Mathematical Sciences. Division Mathematics.en_ZA
dc.date.accessioned2020-11-27T08:51:04Z
dc.date.accessioned2021-01-31T19:41:23Z
dc.date.available2020-11-27T08:51:04Z
dc.date.available2021-01-31T19:41:23Z
dc.date.issued2020-12
dc.descriptionThesis (PhD)--Stellenbosch University, 2020.en_ZA
dc.description.abstractENGLISH ABSTRACT: The study of fluid flow and heat transfer through a microchannel is an important research area due to its wide applications in engineering and industrial processes. Some practical applications include problems dealing with cooling, lubrication of porous bearings, petroleum technology, ground water hydrology, drainage and purification processes. A nanofluid is the suspension of nanoparticles in a base fluid. Nanofluids are capable of heat transfer enhancement due to their high thermal conductivity. For practical applications of nanofluids, research in nanofluids convection is significant. Due to their enhanced properties, nanofluids can be used in the deficiency of technical and biomedical applications such as nanofluid coolant in electronics cooling, vehicle cooling and transformer cooling. This study considered the detailed analysis of both single and two-phase Couette and Poiseuille flow behaviour and heat transfer using this innovative fluid as working fluid through a microchannel. Useful results for the velocity, temperature, nanoparticles concentration profiles, skin friction and Nusselt number were obtained and discussed quantitatively. The effects of important governing flow parameters on the entire flow structure were examined. In this thesis, a more realistic modified Buongiorno’s nanofluid model is proposed and utilized to examine the impact of nanoparticles’ injection and distribution on inherent irreversibility in a microchannel Poiseuille flow of nanofluid with variable properties. The governing nonlinear differential equations are obtained and tackled numerically using the shooting method coupled with the Runge-Kutta-Fehlberg integration scheme. Graphical results showing the effects of the pertinent parameters on the nanofluid velocity, temperature, nanoparticles concentration, skin friction, Nusselt number, Sherwood number, entropy generation rate and Bejan number are presented and discussed quantitatively.en_ZA
dc.description.versionDoctoralen_ZA
dc.format.extentxix, 180 pages : illustrationsen_ZA
dc.identifier.urihttp://hdl.handle.net/10019.1/109255
dc.language.isoen_ZAen_ZA
dc.publisherStellenbosch : Stellenbosch Universityen_ZA
dc.rights.holderStellenbosch Universityen_ZA
dc.subjectNanofluids -- Fluid dynamics -- Mathematical modelsen_ZA
dc.subjectHeat -- Transmission -- Mathematical modelsen_ZA
dc.subjectNanofluids -- Viscosityen_ZA
dc.subjectHeat -- Convectionen_ZA
dc.subjectUCTD
dc.titleTheoretical study of variable viscosity nanofluids flow in microchannelsen_ZA
dc.typeThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
monaledi_theoretical_2020.pdf
Size:
4.29 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Plain Text
Description:
Download
Collections
Doctoral Degrees (Mathematical Sciences)
Doctoral Degrees (Economics)
Doctoral Degrees (School for Science and Technology)