Modelling of Heat Transfer Characteristics around a Cylindrical-Barrier
| Autor: | Olayemi, Olalekan Adebayo, Salaudeen, Abdulganiyu, Al-Farhany, Khaled, Medupin, Rasaq Olawale, Adegun, Isaac Kayode |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | International Journal for Engineering Modelling Volume 35 Issue 1 Regular Issue |
| ISSN: | 1849-8671 1330-1365 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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