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Entropy Analysis of Carbon Nanotubes Based Nanofluid Flow Past a Vertical Cone with Thermal Radiation

1
Department of Computer Science, Bahria University, 44000 Islamabad, Pakistan
2
Department of Mechanical Engineering, Sejong University, Seoul 143-747, Korea
3
Department of Mathematics & Statistics, College of Natural and Health Sciences, Zayed University, 144543 Abu Dhabi, UAE
4
College of Natural and Health Sciences, Zayed University, 144543 Abu Dhabi, UAE
*
Authors to whom correspondence should be addressed.
Entropy 2019, 21(7), 642; https://doi.org/10.3390/e21070642
Received: 6 April 2019 / Revised: 12 May 2019 / Accepted: 14 May 2019 / Published: 28 June 2019
(This article belongs to the Special Issue Thermal Radiation and Entropy Analysis)
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Abstract

Our objective in the present study is to scrutinize the flow of aqueous based nanofluid comprising single and multi-walled carbon nanotubes (CNTs) past a vertical cone encapsulated in a permeable medium with solutal stratification. Moreover, the novelty of the problem is raised by the inclusion of the gyrotactic microorganisms effect combined with entropy generation, chemical reaction, and thermal radiation. The coupled differential equations are attained from the partial differential equations with the help of the similarity transformation technique. The set of conservation equations supported by the associated boundary conditions are solved numerically with the bvp4c MATLAB function. The influence of numerous parameters on the allied distributions is scrutinized, and the fallouts are portrayed graphically in the analysis. The physical quantities of interest including the skin friction coefficient and the rate of heat and mass transfers are evaluated versus essential parameters, and their outcomes are demonstrated in tabulated form. For both types of CNTs, it is witnessed that the velocity of the fluid is decreased for larger values of the magnetic and suction parameters. Moreover, the value of the skin friction coefficient drops versus the augmented bioconvection Rayleigh number. To corroborate the authenticity of the presented model, the obtained results (under some constraints) are compared with an already published paper, and excellent harmony is achieved in this regard. View Full-Text
Keywords: nanofluid; carbon nanotubes (SWCNTs and MWCNTs); solutal stratification; bioconvection; entropy generation nanofluid; carbon nanotubes (SWCNTs and MWCNTs); solutal stratification; bioconvection; entropy generation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ramzan, M.; Mohammad, M.; Howari, F.; Chung, J.D. Entropy Analysis of Carbon Nanotubes Based Nanofluid Flow Past a Vertical Cone with Thermal Radiation. Entropy 2019, 21, 642.

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