Magnetohydrodynamic and entropy generation of double-diffusive mixed convection in a curvilinear cavity filled with nano-enhanced phase change material and a rotating cylinder has been studied in this paper. Three heat sources have been considered and a range of different variables such as Reynolds number (10 ≤ Re ≤ 100), Richardson number (0.1≤ Ri ≤ 10), Hartmann number (0≤ ≤50) Lewis number (0.1≤ ≤ 0.9), bouncy ratio (1≤ N ≤ 5), fusion temperature (0.1≤ ≤0.9) and Stephan number (0.1≤ Ste ≤0.9). These variables have been numerically solved by applying the Finite Element Method. The main results indicated that heat transfer, mass transfer and heat capacity are hugely increased with the increase of the Re, Ri and volume concentration while decreasing with the increase of the number and entropy generation. Furthermore, the melting/solidification region is hugely influenced by the fusion temperature while this variable has a negligible influence on streams, heat transfer and mass transfer. Furthermore, the value of the average Nusselt number and average Sherwood number has increased by 328 % and 258 % respectively by increasing the Reynolds number from 10 to 100. Also, these two numbers have decreased by 61 % and 54 % respectively by increasing the Hartmann number from 0 to 20.

中文翻译：

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主动冷却系统中的水热性能和熵产生的数值分析：NEPCM、双扩散混合对流和 MHD 的案例研究


本文研究了填充纳米增强相变材料的曲线腔和旋转圆柱体内双扩散混合对流的磁流体动力学和熵产生。考虑了三种热源和一系列不同的变量，例如雷诺数 (10 ≤ Re ≤ 100)、理查森数 (0.1≤ Ri ≤ 10)、哈特曼数 (0≤ ≤ 50) 路易斯数 (0.1≤ ≤ 0.9) 、弹性比（1≤N≤5）、熔化温度（0.1≤≤0.9）和斯蒂芬数（0.1≤Ste≤0.9）。这些变量已通过应用有限元法进行数值求解。主要结果表明，传热、传质和热容随着Re、Ri和体积浓度的增加而大幅增加，而随着产生数和熵的增加而减小。此外，熔化/凝固区域受熔化温度的影响很大，而该变量对流、传热和传质的影响可以忽略不计。此外，通过将雷诺数从 10 增加到 100，平均努塞尔数和平均舍伍德数的值分别增加了 328% 和 258%。此外，通过增加哈特曼数，这两个数字分别减少了 61% 和 54%数字从 0 到 20。