Entropy generation analysis in a microchannel Poiseuille flows of nanofluid with nanoparticles injection and variable properties

In this study, a more realistic, modified Buongiorno’s nanofluid model is suggested and used to examine the impact of nanoparticle injection and distribution on inherent irreversibility in a microchannel Poiseuille flow of nanofluid with variable properties. The governing nonlinear differential equa...

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Bibliographic Details
Published inJournal of thermal analysis and calorimetry Vol. 143; no. 3; pp. 1855 - 1865
Main Authors Monaledi, R. Lucky, Makinde, Oluwole Daniel
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.02.2021
Springer
Springer Nature B.V
Subjects
Analytical Chemistry
Brownian motion
Chemistry
Chemistry and Materials Science
Computational fluid dynamics
Entropy
Fluid flow
Heat transfer
Inorganic Chemistry
Laminar flow
Mass transfer
Measurement Science and Instrumentation
Microchannels
Nanofluids
Nanoparticles
Nonlinear differential equations
Physical Chemistry
Polymer Sciences
Runge-Kutta method
Skin friction
Thermophoresis
Brownian motion
Nanoparticles injection
Entropy analysis
Microchannel
Poiseuille flow
Cu–water nanofluid
Thermophoresis
Modified Buongiorno model
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Summary:In this study, a more realistic, modified Buongiorno’s nanofluid model is suggested and used to examine the impact of nanoparticle injection and distribution on inherent irreversibility in a microchannel Poiseuille flow of nanofluid with variable properties. The governing nonlinear differential equations are found and solved numerically using the shooting method coupled with the Runge–Kutta–Fehlberg integration scheme. Graphical results showing the effects of the pertinent parameters on nanofluid velocity, nanoparticle concentration, skin friction, temperature, Nusselt number, Sherwood number, entropy generation rate and Bejan number are presented and discussed quantitatively. It is then found that the aggregation of nanoparticles toward the microchannel centreline region lessens the skin friction and boosts the heat and mass transfer rate. While thermophoresis of mobile nanoparticles escalates the entropy production rate, nanoparticle injection with the Brownian motion lessens it.
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ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-020-09919-x