• Effect of Inner Body Shapes on Natural Convection in Square Enclosures

Wedad Hassan Asiri, Ammar Abdulkadhim, Halemah Ibrahim Elsaeedy, Nejla Mahjoub Said

Keywords: Natural convection, Magnetic field, Square enclosures, Inner bodies, Hartmann number

Received 16 March 2025; Revised 25 April 2025; Accepted 03 May 2025. Available online 15 May 2025.

This review focuses on the effects of inner body shapes on magnetohydrodynamic (MHD) natural convection heat transfer within square enclosures, summarizing advancements from 2015 to 2024 and identifying future research directions. The influence of different geometric shapes such as circular, square, triangular, and elliptical on heat transfer performance and flow behavior is critically examined. The review also addresses the roles of Rayleigh and Hartmann numbers in modulating convection characteristics in the presence of a magnetic field. Key trends and findings are highlighted, along with observed research gaps, to guide future studies aiming to enhance thermal management in MHD driven systems.

[1] Tasnim, S., A. Mitra, H. Saha, M.Q. Islam, and S. Saha, MHD conjugate natural convection and entropy generation of a nanofluid filled square enclosure with multiple heat-generating elements in the presence of Joule heating. Results in Engineering, 17 (2023) :100993.

[2] Wang, X.-Q. and A.S. Mujumdar, A review on nanofluids-part I: theoretical and numerical investigations. Brazilian journal of chemical engineering, 25 (2008) 613-630.

[3] Kasaeian, A., R. Daneshazarian, O. Mahian, L. Kolsi, A.J. Chamkha, S. Wongwises, and I. Pop, Nanofluid flow and heat transfer in porous media: a review of the latest developments. International Journal of Heat and Mass Transfer, 107 (2017) 778-791.

[4] Das, D., M. Roy, and T. Basak, Studies on natural convection within enclosures of various (non-square) shapes–A review. International Journal of Heat and Mass Transfer, 106 (2017) 356-406.

[5] Biswal, P. and T. Basak, Entropy generation vs energy efficiency for natural convection based energy flow in enclosures and various applications: a review. Renewable and Sustainable Energy Reviews, 80 (2017) 1412-1457.

[6] Sadeghi, M.S., N. Anadalibkhah, R. Ghasemiasl, T. Armaghani, A.S. Dogonchi, A.J. Chamkha, H. Ali, and A. Asadi, On the natural convection of nanofluids in diverse shapes of enclosures: an exhaustive review. Journal of Thermal Analysis and Calorimetry, (2020) 1-22.