On Unsteady Three-Dimensional Axisymmetric MHD Nanofluid Flow with Entropy Generation and Thermo-Diffusion Effects on a Non-Linear Stretching Sheet

Almakki, Mohammed; Dey, Sharadia; Mondal, Sabyasachi; Sibanda, Precious

doi:10.3390/e19070168

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On Unsteady Three-Dimensional Axisymmetric MHD Nanofluid Flow with Entropy Generation and Thermo-Diffusion Effects on a Non-Linear Stretching Sheet

by

Mohammed Almakki

¹,

Sharadia Dey

^1,2,*,

Sabyasachi Mondal

¹ and

Precious Sibanda

¹

School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Private Bag X01, Scottsville, 3209 Pietermaritzburg, South Africa

²

DST-NRF Centre of Excellence in Mathematical and Statistical Sciences (CoE-MaSS), Private Bag 3, Wits, 2050 Johannesburg, South Africa

^*

Author to whom correspondence should be addressed.

Entropy 2017, 19(7), 168; https://doi.org/10.3390/e19070168

Submission received: 22 February 2017 / Revised: 8 April 2017 / Accepted: 12 April 2017 / Published: 12 July 2017

(This article belongs to the Special Issue Entropy Generation in Nanofluid Flows)

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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.

Keywords: unsteady 3D axisymmetric nanofluid; entropy generation; spectral quasi-linearization method

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MDPI and ACS Style

Almakki, M.; Dey, S.; Mondal, S.; Sibanda, P. On Unsteady Three-Dimensional Axisymmetric MHD Nanofluid Flow with Entropy Generation and Thermo-Diffusion Effects on a Non-Linear Stretching Sheet. Entropy 2017, 19, 168. https://doi.org/10.3390/e19070168

AMA Style

Almakki M, Dey S, Mondal S, Sibanda P. On Unsteady Three-Dimensional Axisymmetric MHD Nanofluid Flow with Entropy Generation and Thermo-Diffusion Effects on a Non-Linear Stretching Sheet. Entropy. 2017; 19(7):168. https://doi.org/10.3390/e19070168

Chicago/Turabian Style

Almakki, Mohammed, Sharadia Dey, Sabyasachi Mondal, and Precious Sibanda. 2017. "On Unsteady Three-Dimensional Axisymmetric MHD Nanofluid Flow with Entropy Generation and Thermo-Diffusion Effects on a Non-Linear Stretching Sheet" Entropy 19, no. 7: 168. https://doi.org/10.3390/e19070168

APA Style

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), 168. https://doi.org/10.3390/e19070168

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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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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