On unsteady three-dimensional axisymmetric MHD nanofluid flow with entropy generation and thermo-diffusion effects on a non-linear stretching sheet

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Abstract

The entropy generation in unsteady three-dimensional axisymmetric magnetohydrodynamics (MHD) nanofluid flow over a non-linearly stretching sheet is investigated. The flow is subject to thermal radiation and a chemical reaction. The conservation equations are solved using the spectral quasi-linearization method. The novelty of the work is in the study of entropy generation in three-dimensional axisymmetric MHD nanofluid and the choice of the spectral quasi-linearization method as the solution method. The effects of Brownian motion and thermophoresis are also taken into account. The nanofluid particle volume fraction on the boundary is passively controlled. The results show that as the Hartmann number increases, both the Nusselt number and the Sherwood number decrease, whereas the skin friction increases. It is further shown that an increase in the thermal radiation parameter corresponds to a decrease in the Nusselt number. Moreover, entropy generation increases with respect to some physical parameters.

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Almakki, M., Dey, S., Mondal, S., & Sibanda, P. (2017). On unsteady three-dimensional axisymmetric MHD nanofluid flow with entropy generation and thermo-diffusion effects on a non-linear stretching sheet. Entropy, 19(7). https://doi.org/10.3390/e19070168

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