Title: Theoretical investigation of entropy generation effects in nanofluid flow over an inclined stretching cylinder

Authors: Adnan Saeed Butt; M. Nazim Tufail; Asif Ali; Amanullah Dar

Addresses: Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan ' Department of Mathematics, University of Management and Technology, Sialkot Campus 51310, Pakistan ' Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan ' Department of Mathematics, University of Kotli, 11100, Azad Jammu and Kashmir, Pakistan

Abstract: Laminar incompressible boundary layer flow and heat transfer of nanofluid over an inclined stretching cylinder is considered and the entropy effects are theoretically examined during the phenomena. The problem is mathematically modelled and nonlinear partial differential equations are attained. With the help of suitable similarity transformations, these partial differential equations are transformed into nonlinear ordinary differential equations which are numerically solved by utilising shooting technique with fourth-fifth order Runge-Kutta method. The results obtained are compared with the previously existing literature by considering certain limiting cases. The influence of physical parameters on flow, heat transfer and concentration of nanoparticles are analysed qualitatively with the use of graphs and tables. Furthermore, the impact of various physical parameters on local entropy generation number and averaged entropy generation number are also presented through graphs. A detailed comprehensive study has been carried out of the problem.

Keywords: inclined stretching cylinder; nanofluid; entropy generation; mixed convection.

DOI: 10.1504/IJEX.2019.097976

International Journal of Exergy, 2019 Vol.28 No.2, pp.126 - 157

Received: 20 Jul 2018
Accepted: 19 Oct 2018
Published online: 25 Feb 2019 *

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