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Investigation of heat transfer enhancement of Cu-water nanofluid by different configurations of double rotating cylinders in a vented cavity with different inlet and outlet ports

机译:用不同入口和出口的排气腔中双旋转圆柱体不同配置Cu水纳米流体的热传递调查

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摘要

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.
机译:在这项研究中,提出了四种新型在存在Cu水纳米流体中具有多个端口的腔内旋转圆柱的配置。进行一组案例研究以分析主要贡献因素的效果;雷诺数,旋转雷诺数,纳米流体体积分数,入口和出口位置的位置,以及流量和传热特性上的气缸配置(A,B,C和D)。实施平均营养数和性能评估标准(PEC)以实现各种情况的最合适的系统,以及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导致平均营养数和PEC增加。另外,结果表明,在RE = 600处存在最佳点,其平均营养号和PEC最大化为配置A.结果表明,具有入口端口Ⅰ1和出口端口O1的配置C具有最高的传热增强,虽然具有入口端口Ⅰ1和出口端口O2的配置C与两个气缸的整体PEC标准的其他配置有很大的益处。

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