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ARTICLE
EXAMINATION OF CONVECTIVE HEAT TRANSFER AND ENTROPY GENERATION BY TWO ADIABATIC OBSTACLES INSIDE A CAVITY AT DIFFERENT INCLINATION ANGLES
Olanrewaju M. Oyewolaa,b,*, Samuel I. Afolabib
a
School of Mechanical Engineering, Fiji National University, Suva, Fiji
b Department of Mechanical Engineering, University of Ibadan, Ibadan, 200213, Nigeria
* School of Mechanical Engineering, Fiji National University, Suva,Fiji
Corresponding author: Email; oooyewola001@gmail.com
Frontiers in Heat and Mass Transfer 2022, 19, 1-8. https://doi.org/10.5098/hmt.19.20
Abstract
This paper investigates numerically the problem of convective heat transfer and entropy generation by two adiabatic obstacles positioned inside a
square cavity heated at the left wall and cooled on the right wall while horizontal walls are adiabatic. The inclination angle of the cavity orientation
investigated are 30, 60 and 90 degrees. Rayleigh numbers ranging from 103
to 106 were calculated for two vertical obstacles. The method of Galerkin
finite element was employed to solve the conservation equations of mass, momentum and energy. The cavity is assumed to be filled with air with
Prandtl number of 0.71. It was observed that at 30 degree inclination, temperature distribution at the top of the cavity is more pronounced compared to
the temperature at the lower region where adiabatic obstacles are positioned. Consequently, increase in Rayleigh number improve this behavior in all
inclination angles considered. These results show that the effects of inclination angles and adiabatic obstacles on the thermal behaviours and fluid flow
characteristics within the cavity are significantly evident. Rayleigh and Nusselt numbers strongly affect heat transfer rates proportionately. Also, high
temperature gradients exist at regions where entropy is generated.
Keywords
Cite This Article
Oyewola, O. M., Afolabi, S. I. (2022). EXAMINATION OF CONVECTIVE HEAT TRANSFER AND ENTROPY GENERATION BY TWO ADIABATIC OBSTACLES INSIDE A CAVITY AT DIFFERENT INCLINATION ANGLES.
Frontiers in Heat and Mass Transfer, 19(1), 1–8.