Hydrothermal behavior of micro-polar Nano-Encapsulated phase change materials (NEPCMs) in an inclined L-shaped cavity

Case Studies in Thermal Engineering

Ali J. Chamkha¹  Ahmed M. Galal²  M. Ghodrat³  Mohamed Bechir Ben Hamida⁴  Rifaqat Ali⁵  M.S. Sadeghi⁶ 

[1] Corresponding author.;Research Laboratory of Ionized Backgrounds and Reagents Studies (EMIR), Preparatory Institute for Engineering Studies of Monastir (IPEIM), University of Monastir, Monastir City, 5019, Tunisia;College of Engineering, Department of Chemical Engineering, University of Ha'il, Ha'il City, 81481, Saudi Arabia;Department of Mathematics, College of Science and Arts, Muhayil, King Khalid University, 61413, Abha, Saudi Arabia;Faculty of Engineering, Kuwait College of Science and Technology, Doha District, Kuwait;School of Engineering and Information Technology, UNSW, Canberra, Australia;

关键词: Micro-polar NEPCM;    Natural convection;    Entropy generation;    L shaped inclined cavity;    FEM;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper investigates natural convection and entropy generation of the Nano-Encapsulated phase change materials (NEPCMs) in an inclined L-shaped cavity. The NEPCMs are made up of core and shell in which the PCMs are the core section that are capsulated in Nano-shells. These NEPCM particles go through phase change from solid to the liquid while absorbing the heat and release it when their phase changes back to solid. The Navier-Stokes equations are solved by Finite Element Method (FEM) to simulate the behavior of NEPCMs under a set of defined boundary conditions. The effect of Rayleigh number (104-106), micro-rotation parameter (0–2), Nano particle's concentration (0.01–0.05), Stefan number (0.1–0.5), and non-dimensional fusion temperature (0.1–0.3) on the Nusselt number and entropy generation of the fluid flow is also analyzed. The results reveal that the Stefan number, micro-rotation parameter, and non-dimensional fusion temperature have a negative impact on NC heat transfer of NEPCMs and reduce the Nuavg up to 25%, 42%, and 15% respectively. Conversely, the nanoparticle concentration enhances the Nuavg up to 36%.

【 授权许可】

Unknown