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dc.contributor.advisor Makinde, O.D. Ndaba, Cynthia Reitumetse 2013-09-27T06:56:32Z 2013-09-27T06:56:32Z 2007
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. 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. en_US
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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