Preliminary communication
https://doi.org/10.31534/engmod.2022.ri.05b
Modelling of Heat Transfer Characteristics around a Cylindrical-Barrier
Olalekan Adebayo Olayemi
Abdulganiyu Salaudeen
Khaled Al-Farhany
Rasaq Olawale Medupin
Isaac Kayode Adegun
Abstract
Numerical analysis of fluid flow and natural convection heat transfer of Fe3O4-water nanofluid around a heated rectangular cylindrical barrier placed in a square cavity was conducted using COMSOL Multiphysics 5.5 software. The effects of nanoparticles volume fraction (0≤ϕ≤0.06), aspect ratio (0.1≤AR≤0.7), and Rayleigh number (10^2≤Ra≤10^6 ) on heat transfer and fluid flow due to natural convection in the cavity were analyzed. The heated rectangular cylinder walls were set to have a higher constant temperature while the enclosure walls were maintained at a lower fixed temperature. Results are reported in form of velocity streamlines, isothermal contours, local and average Nusselt numbers. Also, the average Nusselt number for all the walls of the heated rectangular cylinder was found to be independent of Rayleigh number in the range of 10^2≤Ra≤10^3 for the various nanoparticle volume fractions (0≤ϕ≤0.06) considered. Furthermore, the average Nusselt number of the walls of the cylinder increases with increasing Rayleigh number and aspect ratio.
Keywords
cylindrical barrier; fluid flow; heat transfer; modelling; nanofluid; natural convection
Hrčak ID:
275072
URI
Publication date:
3.2.2022.
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