Abstract In this article, water based nanofluid pressure drop and heat transfer augmentation due to using twisted tape insert was investigated. Behaviors of CuO-H2O are predicted according to single phase model. Entropy generation due to fluid friction and heat transfer are presented as contours. Roles of Reynolds number, pitch and height ratios are reported by means of Finite volume method. Formulas for Darcy factor and Nusselt number have been offered. Results demonstrate that better mixing of nanofluid occurs for lower values of pitch ratio. Secondary flow becomes stronger with rise of inlet velocity. Height of turbulator has reverse relationship with thermal boundary layer thickness.

中文翻译：

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CuO-水纳米流体在带有扭带湍流器的换热管中的流动和传热

摘要 在本文中，研究了由于使用扭带插入物而导致的水基纳米流体压降和传热增强。根据单相模型预测 CuO-H2O 的行为。由于流体摩擦和热传递而产生的熵被表示为等值线。雷诺数、螺距和高度比的作用通过有限体积法报告。已提供达西因子和努塞尔数的公式。结果表明，对于较低的节距比值，发生更好的纳米流体混合。二次流随着入口速度的增加而变强。湍流器的高度与热边界层厚度成反比关系。