Numerical Study of 3D MHD Mixed Convection and Entropy Generation in Trapezoidal Porous Enclosure Filled with a Hybrid Nanofluid: Effect of Zigzag Wall and Spinning Inner Cylinder

Apichit Maneengam; Tarek Bouzennada; Aissa Abderrahmane; Kaouther Ghachem; Lioua Kolsi; Obai Younis; Kamel Guedri; Wajaree Weera

doi:10.3390/nano12121974

Numerical Study of 3D MHD Mixed Convection and Entropy Generation in Trapezoidal Porous Enclosure Filled with a Hybrid Nanofluid: Effect of Zigzag Wall and Spinning Inner Cylinder

Nanomaterials (Basel). 2022 Jun 8;12(12):1974. doi: 10.3390/nano12121974.

Authors

Apichit Maneengam¹, Tarek Bouzennada², Aissa Abderrahmane³, Kaouther Ghachem⁴, Lioua Kolsi^{5

6}, Obai Younis⁷, Kamel Guedri⁸, Wajaree Weera⁹

Affiliations

¹ Department of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand.
² Mechanics of Materials & Plant Maintenance Research Laboratory (LR3MI), Mechanical Engineering Department, Faculty of Engineering, Badji Mokhtar University, Annaba 23052, Algeria.
³ Laboratoire de Physique Quantique de la Matière et Modélisation Mathématique (LPQ3M), University Mustapha Stambouli of Mascara, Mascara 29000, Algeria.
⁴ Department of Industrial Engineering and Systems, College of Engineering, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia.
⁵ College of Engineering, Mechanical Engineering Department, Ha'il University, Ha'il City 81481, Saudi Arabia.
⁶ Laboratory of Meteorology and Energy Systems, University of Monastir, Monastir 5000, Tunisia.
⁷ Department of Mechanical Engineering, College of Engineering at Wadi Addwaser, Prince Sattam Bin Abdulaziz University, Al-Kharj 11991, Saudi Arabia.
⁸ Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, Makkah 21955, Saudi Arabia.
⁹ Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.

Abstract

A numerical study was performed to analyze the impact of the combination of several factors on heat transfer rate, flow behavior, and entropy generation in a hybrid nanofluid occupying a porous trapezoid enclosure containing a rotating inner tube. The governing equations were discretized and solved using the Finite Element Method using Comsol multiphysics. The effects of the Darcy and Hartman number, nanoparticle volume fraction (from 0 to 6%), the utilization of various zigzag patterns of the hot wall, and the rotation speed of the inner tube (Ω = 100. 250 and 500) are illustrated and discussed in this work. The outputs reveal that flow intensity has an inverse relationship with Hartman number and a direct relationship with the Darcy number and the velocity of the inner tube, especially at high numbers of undulations of the zigzag hot wall (N = 4); also, intensification of heat transfer occurs with increasing nanoparticle volume fraction, Darcy number and velocity of the inner tube. In addition, entropy generation is strongly affected by the mentioned factors, where increasing the nanoparticle concentration augments the thermal entropy generation and reduces the friction entropy generation; furthermore, the same influence can be obtained by increasing the Hartman number or decreasing the Darcy number. However, the lowest entropy generation was found for the case of Ø = 0, Ha = 0 and Da = 0.01.

Keywords: entropy generation; hybrid nanofluid; magneto-hydrodynamics; mixed convection; porous media.

Grants and funding

Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2022R41), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia, and this research received funding support from the NSRF via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation (grant number B05F640092). The authors would like to thank the Deanship of Scientific Research at Umm Al-Qura University for supporting this work by Grant Code: 22UQU4331317DSR14.