MHD couple stress nanofluid flow in a permeable wall channel with entropy generation and nonlinear radiative heat

In this paper, both first and second laws of thermodynamics are employed to examine the combined effects of nonlinear thermal radiation, buoyancy forces, thermophoresis and Brownian motion on entropy generation rate in hydromagnetic couple stress nanofluid flow through a vertical channel with permea...

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Bibliographic Details
Published inJournal of Thermal Science and Technology Vol. 12; no. 2; p. JTST0033
Main Authors MAKINDE, Oluwole Daniel, EEGUNJOBI, Adetayo Samuel
Format Journal Article
LanguageEnglish
Published The Japan Society of Mechanical Engineers and The Heat Transfer Society of Japan 01.01.2017
The Japan Society of Mechanical Engineers
Subjects
Couple stress nanofluid
Entropy generation
MHD channel flow
Suction/Injection
Thermal radiation
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Summary:In this paper, both first and second laws of thermodynamics are employed to examine the combined effects of nonlinear thermal radiation, buoyancy forces, thermophoresis and Brownian motion on entropy generation rate in hydromagnetic couple stress nanofluid flow through a vertical channel with permeable walls. The model equations of momentum, energy balance and nanoparticle concentration are obtained and tackled numerically using a shooting technique coupled with Runge-Kutta-Fehlberg integration scheme. The numerical results for velocity, temperature and nanoparticles concentration profiles are utilised to determine the skin friction, Nusselt number, Sherwood number, entropy generation rate and Bejan number. It is found that the entropy production in the flow system can be effectively minimized by regulating the values of the thermophysical parameters for efficient operation. Some other interesting results are displayed graphically and discussed quantitatively.
ISSN:1880-5566
1880-5566
DOI:10.1299/jtst.2017jtst0033