Abderrahmane Aissa, Al-Khaleel Mohammad, Mourad Abed, Laidoudi Houssem, Driss Zied, Younis Obai, Guedri Kamel, Marzouki Riad
Laboratoire de Physique Quantique de la Matière et Modélisation Mathématique (LPQ3M), University Mustapha Stambouli of Mascara, Mascara 29000, Algeria.
Department of Mathematics, Khalifa University, Abu Dhabi 127788, United Arab Emirates.
Nanomaterials (Basel). 2022 Aug 24;12(17):2917. doi: 10.3390/nano12172917.
Energy saving has always been a topic of great interest. The usage of nano-enhanced phase change material NePCM is one of the energy-saving methods that has gained increasing interest. In the current report, we intend to simulate the natural convection flow of NePCM inside an inverse T-shaped enclosure. The complex nature of the flow results from the following factors: the enclosure contains a hot trapezoidal fin on the bottom wall, the enclosure is saturated with pours media, and it is exposed to a magnetic field. The governing equations of the studied system are numerically addressed by the higher order Galerkin finite element method (GFEM). The impacts of the Darcy number (Da = 10-10), Rayleigh number (Ra = 10-10), nanoparticle volume fraction (φ = 0-0.08), and Hartmann number (Ha = 0-100) are analyzed. The results indicate that both local and average Nusselt numbers were considerably affected by Ra and Da values, while the influence of other parameters was negligible. Increasing Ra (increasing buoyancy force) from 10 to 10 enhanced the maximum average Nusselt number by 740%, while increasing Da (increasing the permeability) from 10 to 10 enhanced both the maximum average Nusselt number and the maximum local Nusselt number by the same rate (360%).
节能一直是一个备受关注的话题。纳米增强相变材料（NePCM）的使用是一种越来越受关注的节能方法。在本报告中，我们打算模拟NePCM在倒T形封闭腔内的自然对流流动。流动的复杂性源于以下因素：封闭腔底部壁面上有一个热梯形翅片，封闭腔内充满多孔介质，并且它处于磁场中。所研究系统的控制方程通过高阶伽辽金有限元方法（GFEM）进行数值求解。分析了达西数（Da = 10⁻¹⁰）、瑞利数（Ra = 10⁻¹⁰）、纳米颗粒体积分数（φ = 0 - 0.08）和哈特曼数（Ha = 0 - 100）的影响。结果表明，局部和平均努塞尔数都受到Ra和Da值的显著影响，而其他参数的影响可以忽略不计。将Ra（增加浮力）从10增加到10，最大平均努塞尔数提高了740%，而将Da（增加渗透率）从10增加到10，最大平均努塞尔数和最大局部努塞尔数提高的速率相同（360%）。
