Mourad Najjaoui^1,*, Thami Ait-taleb¹, Abdelhalim Abdelbaki², Zaki Zrikem², Hassan Chaib¹

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.5, pp. 1399-1407, 2022, DOI:10.32604/fdmp.2022.021760

Abstract This work presents the results of a set of steady-state numerical simulations about heat transfer in hollow blocks in the presence of coupled natural convection, conduction and radiation. Blocks with two air cells deep in the vertical direction and three identical cavities in the horizontal direction are considered (typically used for building ceilings). Moreover, their outside horizontal surface is subjected to an incident solar flux and outdoor environment temperature while the inside surface is exposed to typical indoor environment conditions. The flows are considered laminar and two-dimensional over the whole range of parameters examined. The conservation equations are solved by… More >

Mourad Najjaoui^1,*, Thami Ait-Taleb¹, Abdelhalim Abdelbaki², Zaki Zrikem², Hassan Chaib¹

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.5, pp. 1339-1348, 2022, DOI:10.32604/fdmp.2022.021564

Abstract In this paper, some effort is provided to optimize the geometry of a concrete hollow brick (used in the construction of building roofs) in order to increase the related thermal resistance, thereby reducing energy consumption. The analysis is conducted for three different configurations of the hollow concrete bricks. Coupling of conduction, natural convection and thermal radiation phenomena is considered. Moreover, the flows are assumed to be laminar and two-dimensional for the whole range of parameters examined. The conservation equations are solved by a finite difference method based on the control volumes approach and the SIMPLE algorithm for velocity-pressure coupling. The… More >