Abstract
Various industrial operations involve frequent heating and cooling of electrical systems. In such circumstances, the development of relevant thermal devices is of extreme importance. During the development of thermal devices, the second law of thermodynamics plays an important role by means of entropy generation. Entropy generation should be reduced significantly for the efficient performance of the devices. The current paper reports an analytical study on micropolar fluid with entropy generation over a stretching surface. The influence of various physical parameters on velocity profile, microrotation profile, and temperature profile is investigated graphically. The impact of thermal radiation, porous medium, magnetic field, and viscous dissipation are also analyzed. Moreover, entropy generation and Bejan number are also illustrated graphically. Furthermore, the governing equations are solved by using HAM and code in MATHEMATICA software. It is concluded from this study that velocity and micro-rotation profile are reduced for higher values of magnetic and vortex viscosity parameter, respectively. For larger values of Eckert number and thermal radiation parameters, Bejan number and entropy generation are increased, respectively. These findings are useful in petroleum industries and engineering designs.
Highlights
In recent decades, the study of Newtonian fluids has not been considered adequate to specify the flow properties such as coal slurries, polymeric fluids, and mine tailings, and these properties are expressed in non-Newtonian fluid flow model
The main purpose of this section is to investigate the influence of various physical parameters on entropy ( entropy generation (EG) (η )), Bejan number ( Be(η )), microrotation ( g(η )), temperature (θ (η )), and velocity ( f 0 (η )) distributions over stretching sheet
It can be observed from the figure that the different increasing numerical values of the thermal radiation parameter causes an increase in the Bejan number
Summary
The study of Newtonian fluids has not been considered adequate to specify the flow properties such as coal slurries, polymeric fluids, and mine tailings, and these properties are expressed in non-Newtonian fluid flow model. Khader et al [17] analyzed the effect of non-uniform heat source sink and thermal radiation on MHD unsteady flow of micropolar fluid They transformed the partial differential equation into an ordinary differential equation and solved it using a predictor-corrector method. Harshad [24] examined the mixed convection MHD flow of micropolar fluid in porous media towards a nonlinear stretching sheet They analyzed the properties of heat and mass transfer with thermophoresis, Brownian motion, chemical reaction, and nonlinear thermal radiation. The main objective of the present study is to investigate the characteristics of magnetized micropolar fluid, heat transfer, and entropy generation These investigations will be greatly beneficial in industrial applications, thermal design, and many other engineering sectors. The graphical and numerical results were analyzed and the conclusion points shared in this article
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