Ahmed Sameh E, Abderrahmane Aissa, Alotaibi Sorour, Younis Obai, Almasri Radwan A, Hussam Wisam K
Department of Mathematics, Faculty of Science, King Khalid University, Abha 62529, Saudi Arabia.
Department of Mathematics, Faculty of Science, South Valley University, Qena 83523, Egypt.
Nanomaterials (Basel). 2021 Dec 31;12(1):129. doi: 10.3390/nano12010129.
Using phase change materials (PCMs) in energy storage systems provides various advantages such as energy storage at a nearly constant temperature and higher energy density. In this study, we aimed to conduct a numerical simulation for augmenting a PCM's melting performance within multiple tubes, including branched fins. The suspension contained AlO/n-octadecane paraffin, and four cases were considered based on a number of heated fins. A numerical algorithm based on the finite element method (FEM) was applied to solve the dimensionless governing system. The average liquid fraction was computed over the considered flow area. The key parameters are the time parameter (100 ≤t≤600 s) and the nanoparticles' volume fraction (0%≤φ≤8%). The major outcomes revealed that the flow structures, the irreversibility of the system, and the melting process can be controlled by increasing/decreasing number of the heated fins. Additionally, case four, in which eight heated fins were considered, produced the largest average liquid fraction values.
在储能系统中使用相变材料（PCM）具有诸多优势，例如在近乎恒定的温度下储能以及更高的能量密度。在本研究中，我们旨在进行数值模拟，以增强包含分支翅片的多根管道内PCM的熔化性能。悬浮液包含AlO/正十八烷石蜡，基于加热翅片的数量考虑了四种情况。应用基于有限元方法（FEM）的数值算法来求解无量纲控制方程组。在考虑的流动区域上计算平均液相分数。关键参数是时间参数（100≤t≤600秒）和纳米颗粒的体积分数（0%≤φ≤8%）。主要结果表明，流动结构、系统的不可逆性以及熔化过程可以通过增加/减少加热翅片的数量来控制。此外，考虑了八个加热翅片的情况四产生了最大的平均液相分数值。
