Natural convection in polar enclosure heated from below and cooled from above

A numerical study of natural convection in fluid filled, 2-dimensional cylindrical sector enclosure for a wide variety of Rayleigh number is presented in this paper. Finite difference method with first order upwind was chosen for the solution of the mass, momentum and energy transfer governing equat...

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Bibliographic Details
Main Authors: Rasih, Radzi Abdul, Halmy, Mohd Noor, Alias, Siti Khadijah, Hamami, Mohd Ghazali Bin Mohd
Format: Conference Proceeding
Language:English
Subjects:
Aspect ratio
Computational fluid dynamics
Computer simulation
Convection cooling
Enclosures
Energy transfer
Finite difference method
Fluid flow
Free convection
Momentum
Rayleigh number
Vorticity
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Summary:A numerical study of natural convection in fluid filled, 2-dimensional cylindrical sector enclosure for a wide variety of Rayleigh number is presented in this paper. Finite difference method with first order upwind was chosen for the solution of the mass, momentum and energy transfer governing equations. Stream-vorticity function is considered to reduce the pressure term in momentum equation. First, the code was validated against the numerical result taken from the previous study of fluid flow in a rectangular cavity. Simulations are performed for several values of both the length in radial direction with angle direction ratio of the enclosure in the range between (19/16)π to (19/4)π, and the Rayleigh number based on the angle of enclosure in the range between 102 to 106. The results show that the increase in both aspect ratio and Rayleigh number gives an effect on flow configuration of the enclosure.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4965115