dc.contributor.advisor Makinde, O.D. dc.contributor.author Ndaba, Cynthia Reitumetse dc.date.accessioned 2013-09-27T06:56:32Z dc.date.available 2013-09-27T06:56:32Z dc.date.issued 2007 dc.identifier.uri http://hdl.handle.net/10386/956 dc.description Thesis (M.Sc. (Applied Mathematics)) --University of Limpopo, 2007 en_US dc.description.abstract The thermodynamic irreversibility in any fluid flow process can be quantified through entropy analysis. The first law of thermodynamics is simply an expression of the conservation of energy principle. The second law of thermodynamics states that all real processes are irreversible. Entropy generation is a measure of the account of irreversibility associated with the real processes. As entropy generation takes place, the quality of energy (i.e. exergy) decreases. In order to preserve the quality of energy in a fluid flow process or at least to reduce the entropy generation, it is important to study the distribution of the entropy generation within the fluid volume. In this dissertation, the inherent irreversibility in the flow of a variable viscosity fluid in both a closed channel and an open channel is investigated. The channel is assumed to be narrow, so that the lubrication approximation may be applied and the fluid viscosity is assumed to vary linearly with temperature. Both the lower and the upper surfaces of the channel are maintained at different temperature. The simplified form of governing equations is obtained and solved analytically using a perturbation technique. Expressions for fluid velocity and temperature are derived which essentially expedite to obtain expressions for volumetric entropy generation numbers, irreversibility distribution ratio and the Bejan number in the flow field. en_US In chapter 1, a historic background of the study is highlighted. Both closed and open channels problem are investigated in chapters 2 and 3. In chapter 4, generally discussion on the overall results obtained from the investigation is displayed together with possible areas of future research work. dc.format.extent xii,64 leaves en_US dc.language.iso en en_US dc.publisher University of Limpopo (Turfloop Campus) en_US dc.relation.requires pdf en_US dc.subject Entropy analysis en_US dc.subject Channel flow en_US dc.subject Temperarture dependent viscosity en_US dc.subject Thermodynamics en_US dc.subject.ddc 536.73 en_US dc.subject.lcsh Viscosity en_US dc.subject.lcsh Viscosity flow en_US dc.subject.lcsh Entropy en_US dc.title Entropy analysis in a channel flow with temperature dependent viscosity en_US dc.type Thesis en_US
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