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Open AccessArticle

Characterization of Marangoni Forced Convection in Casson Nanoliquid Flow with Joule Heating and Irreversibility

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Department of Mathematics, DCC-KFUPM Box 5084, Dhahran 31261, Saudi Arabia
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Department of Mathematics, Quaid-I-Azam University, Islamabad 45320, Pakistan
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Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
*
Author to whom correspondence should be addressed.
Entropy 2020, 22(4), 433; https://doi.org/10.3390/e22040433
Received: 24 February 2020 / Revised: 6 April 2020 / Accepted: 8 April 2020 / Published: 10 April 2020
The Marangoni forced convective inclined magnetohydrodynamic flow is examined. Marangoni forced convection depends on the differences in surface pressure computed by magnetic field, temperature, and concentration gradient. Casson nanoliquid flow by an infinite disk is considered. Viscous dissipation, heat flux, and Joule heating are addressed in energy expressions. Thermophoresis and Brownian motion are also examined. Entropy generation is computed. The physical characteristics of entropy optimization with Arrhenius activation energy are discussed. Nonlinear PDE’s are reduced to highly nonlinear ordinary systems with appropriate transformations. A nonlinear system is numerically computed by the NDSolve technique. The salient characteristics of velocity, temperature, concentration, entropy generation, and Bejan number are explained. The computational results of the heat-transfer rate and concentration gradient are examined through tables. Velocity and temperature have reverse effects for the higher approximation of the Marangoni number. Velocity is a decreasing function of the Casson fluid parameter. Temperature is enhanced for higher radiation during reverse hold for concentration against the Marangoni number. The Bejan number and entropy generation have similar effects for Casson fluid and radiation parameters. For a higher estimation of the Brinkman number, the entropy optimization is augmented. View Full-Text
Keywords: mixed convection; rotating cone; viscous fluid; Bejan number; entropy generation; thermal radiation; viscous dissipation; Dufour and Soret effects and chemical reaction mixed convection; rotating cone; viscous fluid; Bejan number; entropy generation; thermal radiation; viscous dissipation; Dufour and Soret effects and chemical reaction
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MDPI and ACS Style

Sadiq, M.A.; Hayat, T. Characterization of Marangoni Forced Convection in Casson Nanoliquid Flow with Joule Heating and Irreversibility. Entropy 2020, 22, 433.

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