Numerical analysis of unsteady free convection under the combined
\ninfluence of inclined magnetohydrodynamic and exothermic chemical
\nreaction in an enclosure filled with nanofluid
\nHussein H. Alaydamee a, Mohammed Azeez Alomari b,c,*, Qusay H. Al-Salami d,
\nFarah Q.A. Alyousuf e, Faris Alqurashi f, Mujtaba A. Flayyih g
\na Department of Chemical Engineering, University of Al-Qadisiyah, College of Engineering, Al-Qadisiyah, 58002, Iraq
\nb Department of Mechanical Engineering, University of Al-Qadisiyah, Ad-Diwaniyah, 58001, Iraq
\nc College of Engineering, University of Warith Al-Anbiyaa, Karbala, Iraq
\nd Department of Business Administration, College of Administrative and Financial Sciences, Cihan University-Erbil, Iraq
\ne Department of Computer Network, College of Engineering and Computer Science, Lebanese French University, Erbil, Kurdistan Region, Iraq
\nf Mechanical Engineering Dept., College of Engineering, University of Bisha, Bisha, Saudi Arabia
\ng Biomedical Engineering Department, College of Engineering and Technologies, Al-Mustaqbal University, Hillah, Iraq
\nA R T I C L E I N F O
\nKeywords:
\nMHD
\nUnsteady-natural convection
\nInclined MHD
\nExothermic reaction
\nTrapezoidal enclosure
\nA B S T R A C T
\nUnsteady study of the natural convection of aluminum oxide-water nanofluid within a trapezoidal geometry
\ncontaining a circular cylinder located at its center. Finite Element method has been considered for the numerical
\nanalysis. The proposed investigation handled the impact of Rayleigh number (103\u2013105), chemical reaction
\nparameter (0\u20134), aluminum oxide nanoparticles volume fraction (0\u20130.06), magnetic field (0\u201363) and its inclination
\nangle (0\u25e6\u201390\u25e6), and circular obstacle diameter (0.3\u20130.7) effects on time-dependent natural convection of
\nAl2O3\u2013H2O nanofluid. On the other hand, the value of Prandtl number has kept constant at (Pr = 6.2). Since the
\nnanofluid mobility at \u03c6 = 0.02, Ha = 3, and Fk = 1 significantly improved, the heat transfer rate achieved its
\nmaximum intensity at Ra = 105. Research also reveals a little effect on heat transfer by increasing the fraction of
\nnanoparticles. Additionally, as Ha intensifies from 0 to 63, a final change in the mean Nusselt number of 28.65 %
\nis displayed. Finally, as the magnetic field angle of rotation is diminished, more enhancement in heat transmission
\nis achieved. This research provides insights into the intricate relationship between natural convection
\nand exothermic reaction under the influences of various conditions. This can illustrate the flow and thermal
\nbehaviors of nanofluid in such non-uniform shapes in many engineering applications.<\/p>\n