NUMERICAL STUDY OF THERMAL BEHAVIOR OF CONCRETE BRICKS USED IN LIBYA USING ANSYS SOFTWARE

دراسة عددية للسلوك الحراري للطوب الخرساني المستخدم في ليبيا باستخدام برنامج ANSYS

Abstract

ABSTRACT

In the present work, the thermal behaviour of three types of concrete bricks used in Libya was studied and analysed numerically in a three-dimensional computational domain. Under steady-state conditions, one side of the brick was assumed to be hot while the opposite side was assumed to be cold. Temperatures of the heated wall and of the cooled wall were assumed to be constant. The objective of this study is to compare the thermal behaviours of three types of concrete bricks manufactured and used in Libya that have different cavity sizes and different dimensions and determine the effects of the aspect ratio and Rayleigh number on flow behaviour and heat transfer in the cavity. This study showed that the Rayleigh number drastically influenced the flow profile and heat transfer inside the cavity, as well as the thickness of the thermal boundary layer. It was also verified that the Nusselt number is strongly dependent on the aspect ratio, and that this dimensionless variable increases with the increase of this ratio. ANSYS® Workbench™, version 19.2 has been used for modelling and simulation.