Abstract The goal of this numerical investigation is to evaluate the impact of fin arrangement on the hydrothermal and irreversibility analysis of a biologically ecofriendly prepared water-Ag nanofluid flowing inside a microchannel heatsink. Three bifurcation microchannels heatsinks with straight channels, inline fins, and staggered fins are considered. Two-phase mixture method is used to model the nanofluid behaviour precisely. The influences of nanoparticle volume fraction (φ) and Reynolds number (Re) on the parameters of convective coefficient, CPU surface temperature, pumping power, heat transfer and fluid friction irreversibilities are examined. It was found that the hydrothermal characteristics and irreversibility behaviour of the heatsinks equipped with fins are better than those of the heatsink with straight channels. The results showed that the best overall first-law and second law performances respectively belong to the heatsink equipped with staggered (except for the φ = 0.1%, φ = 0.5% and Re = 500) and inline fins. Moreover, the application of water-Ag nanofluid in the studied heatsinks was more justifiable for high Re and φ. Finally, it was revealed that boosting both the Re and φ results in an augmentation in the second law performance of nanofluid in the studied heatsinks.

中文翻译：

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翅片排列对生物制备水银纳米流体分叉微通道散热器第一和第二定律性能影响的两相混合模拟

摘要 本数值研究的目的是评估翅片排列对在微通道散热器内流动的生物生态友好型制备的水银纳米流体的水热和不可逆性分析的影响。考虑了具有直通道、内嵌翅片和交错翅片的三个分叉微通道散热器。两相混合法用于精确模拟纳米流体行为。研究了纳米颗粒体积分数 (φ) 和雷诺数 (Re) 对对流系数、CPU 表面温度、泵送功率、传热和流体摩擦不可逆性等参数的影响。结果表明，配备翅片的散热器的水热特性和不可逆行为优于直通道散热器。结果表明，最佳整体第一定律和第二定律性能分别属于配备交错（除了 φ = 0.1%、φ = 0.5% 和 Re = 500）和直列散热片的散热器。此外，在研究的散热器中应用水银纳米流体对于高 Re 和 φ 更合理。最后，研究表明，提高 Re 和 φ 会增强所研究散热器中纳米流体的第二定律性能。