In this study, four novel configurations of rotating cylinders in cavity with multiple ports in the presence Cu-water nanofluid are proposed. A set of case studies are conducted to analyze the effect of the main contributing factors; Reynolds numbers, Rotational Reynolds numbers, the nanofluid volume fraction, position of inlet and outlet ports, and cylinders configurations (A, B, C, and D) on the flow and heat transfer characteristics. The mean Nusselt number and Performance Evaluation Criteria (PEC) are implemented to achieve the most suitable system for various situations, as well as finding the efficiency of these configurations. The results show that increasing the nanofluid volume fraction and the rotational Reynolds number cause the mean Nusselt number and PEC to increase. Also, the results indicate that there is an optimum point, at Re = 600, which the mean Nusselt number and PEC are maximized for configuration A. Results indicate that configuration C with inlet port I1 and outlet port O1 has the highest heat transfer enhancement, while configuration C with inlet port I1 and outlet port O2 is much beneficial than the other configurations in terms of the overall PEC criteria of both cylinders.

在这项研究中，提出了四种新颖的旋转圆柱体配置，在存在铜水纳米流体的情况下，具有多个端口的腔体。进行了一组案例研究来分析主要影响因素的影响；雷诺数、旋转雷诺数、纳米流体体积分数、入口和出口位置以及流动和传热特性上的气缸配置（A、B、C 和 D）。实施平均努塞尔数和性能评估标准 ( PEC ) 以实现最适合各种情况的系统，并找到这些配置的效率。结果表明，增加纳米流体体积分数和旋转雷诺数会导致平均努塞尔数和PEC来增加。此外，结果表明存在一个最佳点，即Re  = 600，配置 A的平均努塞尔数和PEC最大化。结果表明具有入口 I1 和出口 O1 的配置 C 具有最高的传热增强，就两个气缸的整体PEC标准而言，带有入口 I1 和出口端口 O2 的配置 C 比其他配置更有利。