Abstract
The present study aims to investigate coupled heat transfer by natural convection and conduction through a concrete hollow brick. The governing equations for conservation of mass, momentum and energy are discretized by the finite volume approach and solved by the SIMPLE algorithm. The numerical simulations were conducted to investigate the effect of Rayleigh number (103≤ Ra ≤ 107) on the heat transfer and fluid flow within the structure.
Highlights
The concrete hollow bricks are usually used in the construction of building walls in Morocco
The results show that for Ra = 105, the isotherms are almost parallel to the active walls of the structure indicating that the heat transfers are dominated by conduction
The distortion of the isotherms in the central zone of the structure becomes more pronounced as Ra increases indicating an increase of the natural convection intensity
Summary
The concrete hollow bricks are usually used in the construction of building walls in Morocco. During the last two decades, several experimental and numerical studies [1,2,3] have been presented for describing two-dimensional combined heat transfers through hollow bricks. Three-dimensional studies dealing with coupled heat transfers through concrete hollow bricks are few. Li et al [4] conducted a numerical study to find the optimum configuration of external hollow clay brick of differing size. Sun and Fang [5] investigated numerically the heat transfer performance of concrete hollow bricks for different configurations. The main objective of the present work is to study numerically combined heat transfer by natural convection and conduction through a concrete hollow brick. The effect of Rayleigh number on the heat transfer and fluid flow within the structure is presented and examined
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