Parametric study of natural convection heat transfer from an inclined rectangular cylinder embedded in a square enclosure
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis
Abstract
This paper presents the effects of aspect ratio (0.1 < AR < 0.7), Rayleigh number
(102 < Ra < 106) and inclination angle (0o< γ <90o) of the heated rectangular cylinder on
heat transfer and fluid flow characteristics due to natural convection in air around heated
rectangular cylinders of different sizes inside a cold square enclosure. Galerkin finite element
method was adopted for the solution of the developed model. The walls of the enclosure were
maintained at an isothermal cold temperature while the boundaries of the rectangular cylinder
were kept at a constant hot temperature. The results are presented in the form of isothermal
contours, stream functions, local and average Nusselt numbers. It has been found that for the
range of aspect ratio and Rayleigh number considered, the rate of heat transfer increases with
increasing aspect ratio and Rayleigh number. Furthermore, the orientation angle of the
rectangular cylinder was found to generally augment heat transfer rate except at AR value of
0:1, where the average Nusselt number declines beyond γ = 45o for all the range of Rayleigh
numbers considered. Results from the present study could be applied to nuclear reactor
technology and cooling of electronic chips system optimisation.
Description
Keywords
Natural convection; rectangular cylinder; aspect ratio; inclination angle; square enclosure
Citation
Olalekan Adebayo Olayemi, Al-Farhany Khaled, Olabemiwo Jekayinoluwa Temitope, Ogunwoye Oloruntobiloba Victor, Christopher B Odetunde & Isaac Kayode Adegun (2021): Parametric study of natural convection heat transfer from an inclined rectangular cylinder embedded in a square enclosure, Australian Journal of Mechanical Engineering, DOI: 10.1080/14484846.2021.1913853