This paper presents the results of a numerical study on the thermal–hydraulic and entropy generation analysis for a nanofluid flow inside a plate-fin triangular duct. Vortex generators are placed in the duct to improve the heat transfer rate and fluid mixing. Reynolds number (Re), volume fraction of nanoparticles (α) and vortex generators’ angle of attack (θ) are selected as the pertinent parameters. All simulations are performed for the following range of parameters: 200 < Re < 1000; 0<α < 0.05 and 0 < θ< 50. The results are presented for the dimensionless pressure drop, Nusselt number and entropy generations (friction and thermal entropy generations). Results indicate that for θ < 40°, the thermal entropy generation reduces by increasing θ, while for θ > 40°, increasing θ leads to an increase in the thermal entropy generation. Moreover, the friction entropy generation was found to increase by 8% when the angle of attack is increased from 0 to 40°.

中文翻译：

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配备三角翼小涡旋发生器的三角形管道内的纳米流体传热和熵产生

本文介绍了对板翅式三角管内的纳米流体的热-液压和熵产生分析的数值研究结果。涡流发生器放置在管道中，以提高传热速率和流体混合。选择雷诺数（Re），纳米颗粒的体积分数（α）和涡流发生器的迎角（θ）作为相关参数。对以下参数范围执行所有仿真：200 <  Re  <1000；0 < α  <0.05和0 <  θ <50。给出了无因次压降，努塞尔数和熵生成（摩擦和热熵生成）的结果。结果表明θ  <40°时，热熵的产生会随着θ的增加而减小，而对于θ  > 40°而言，θ的增加会导致热熵的产生增加。而且，发现当攻角从0°增加到40°时，摩擦熵产生增加了8％。