The paper discusses the numerical investigation involving forced convective heat transfer (HT) in the laminar flow regime is carried out for nanofluid (NF) and hybrid NF (HNF) in a microtube and wavy microchannel. Water-based Al₂O₃ NF and water-based Al₂O₃-Ag HNF is studied for this purpose. Reynolds number (Re), temperature, volume fraction, and nanoparticle (NP) size are varied for the analysis at a constant HT rate. Numerical results characterizing the performances of NF and HNF are presented in terms of the local HT coefficient. It is found that with the increase in Reynolds number, volume fraction, and temperature, local HT coefficient is increased. For Reynolds number of 50 and 𝜑 = 3%, a maximum of 11.03% increase in HT coefficient is obtained for microtube, while for the same case, a maximum of 10.16% is found for wavy microchannel. Comparison of NF and HNF reveals superior HT property of the later. However, microtube exhibits better HT coefficient than the wavy channel at constant heat flux, length, and area.

中文翻译：

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使用混合纳米流体增强微管和波浪形微通道中的传热：数值研究

本文讨论了在微管和波浪形微通道中对纳米流体 (NF) 和混合 NF (HNF) 进行层流状态下强制对流换热 (HT) 的数值研究。为此目的研究了水基Al ₂ O ₃ NF 和水基Al ₂ O _{3 -Ag HNF。}雷诺数 (Re)、温度、体积分数和纳米颗粒 (NP) 尺寸在恒定的 HT 速率下进行分析。表征 NF 和 HNF 性能的数值结果以局部 HT 系数的形式呈现。发现随着雷诺数、体积分数和温度的增加，局部HT系数增加。对于雷诺数 50 和𝜑= 3%，微管的 HT 系数最大增加 11.03%，而对于相同的情况，波浪形微通道的最大增加 10.16%。NF和HNF的比较揭示了后者优越的HT特性。然而，微管在恒定的热通量、长度和面积下表现出比波浪形通道更好的 HT 系数。