A Comprehensive Review on the Natural Convection Heat Transfer in Horizontal and Inclined Closed Rectangular Enclosures with Internal Objects at Various Heating Conditions

Antony Jobby, Mehdi Khatamifar and Wenxian Lin ()
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Antony Jobby: College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
Mehdi Khatamifar: College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
Wenxian Lin: College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia

Energies, 2025, vol. 18, issue 4, 1-70

Abstract: This study is a comprehensive review on the natural convection heat transfer in horizontal and inclined closed rectangular enclosures with internal objects (including circular, square, elliptic, rectangular, and triangular cylinders, thin plates, as well as other geometries) at various heating conditions. The review examines the influence of various pertinent governing parameters, including the Rayleigh number, Prandtl number, geometries, inclination of enclosure, concentration of nanoparticles, non-Newtonian fluids, magnetic force, porous media, etc. It also reviews various numerical simulation methods used in the previous studies. The present review shows that the presence of inner objects at different heating conditions and the inclination of enclosures significantly changes the natural convection flow and heat transfer behavior. It is found that the existing studies within the scope of the present review are essentially numerical with the assumption of laminar flow and at relatively low Rayleigh numbers, which significantly restrict the usefulness of the results for practical applications. Furthermore, the majority of the past studies focused on single and two inner objects in simple shapes (circular, square, and elliptic) and assumed identical objects and uniformly distributed placements when multiple inner objects are presented. Based on the review outcomes, some recommendations for future research on this specific topic are made.

Keywords: review; heat transfer; natural convection; inner object; horizontal enclosure; inclined enclosure; heating (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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