Numerical Investigation of Turbulent Convection Flow in a Rectangular Closed Cavity

https://doi.org/10.48185/jmam.v5i3.1084

Authors

Abstract

Natural turbulent convection in closed cavities has many practical applications in the field of engineering
such as the design of electronic computer chips, atomic installation and industrial cooling among others. In
particular, it enables in achieving a desired micro-climate and efficient ventilation in a building. Recent studies
show that turbulent flow is affected by variations in Rayleigh numbers, aspect ratio, and heater position
among others. Temperature is kept constant in all these studies hence inadequate literature on the effects
of temperature on a turbulent flow. In this study, aspect ratio and Rayleigh numbers are kept constant at
2 and 1012 respectively and natural turbulent convection flow in a closed rectangular cavity is investigated
numerically as the operating temperature is varied from 285.5K to 293K. The rectangular cavity’s lower wall
was heated and cooling done at the top face wall while the rest of the vertical walls were kept in adiabatic
condition. Material properties such as density of the fluid kept on changing at any given temperature. The
thermal profile data generated influenced the nature of the turbulent flow. The non-linear averaged continuity,
momentum, and energy equation terms were modeled by the SST k − ω model to generate streamlines,
isotherms, and velocity magnitude for a different operating temperature and presented graphically. The finite
difference method and FLUENT were used to solve two SST k − ω model equations, vortices, and energy with
boundary conditions. It was discovered that, as the operating temperature increased turbulence decreased
due to a decrease in the velocity of the elements and vortices became more parallel and smaller.

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Author Biography

Geofrey Moturi, Kenyatta university

 

 

References

Polasanapalli, S. and Anupindi, K. (2022) Mixed convection heat transfer in the two-dimensional annular cavity using an off-lattice Boltzmann method. International Journal of Thermal Sciences 179,107677

Roshan, S., Ravi, S. and Mahendra, K. (2022) Large-eddy simulation of Rayleigh -Bernard convection at extreme Rayleigh numbers. Physics of fluids 34:7, 075133

Awour K. (2012), Turbulent Natural Convection in an enclosure; Numerical study of different k-epsilon models, Kenyatta University, Kenya ,1-102.

Husain, S. and Arqam, M (2021). A review on the thermal performance of natural convection in a vertical annulus and its application. Renewable and Sustainable Energy Reviews, Volume 150.

Weppe, A. and Moreau, F. (2022) Experimental investigation of a turbulent natural convection cubic cavity with an inner obstacle partially heated; Int. J. Heat Mass Transfer.

Ying, Z and Huang, X. (2021). Numerical simulation of natural convection in a porous cavity with internal hot and cold sources using the lattice Boltzmann method. Canadian Journal of Physics.

Published

2024-11-04

How to Cite

Awuor , K. ., & Moturi, G. (2024). Numerical Investigation of Turbulent Convection Flow in a Rectangular Closed Cavity. Journal of Mathematical Analysis and Modeling, 5(3), 24–35. https://doi.org/10.48185/jmam.v5i3.1084

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