Studies on Al2O3, CuO, and TiO2 Water-Based Nanofluids: A Comparative Approach in Laminar and Turbulent Flow

Minea A. A.; Moldoveanu M. G.

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Studies on Al2O3, CuO, and TiO2 Water-Based Nanofluids: A Comparative Approach in Laminar and Turbulent Flow

机译：Al2O3，CuO和TiO2水基纳米流体研究：层流和湍流的比较方法

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The Prandtl number, Reynolds number and Nusselt number are functions of thermophysical properties of nanofluids, and these numbers strongly influence the convective heat transfer coefficient. The thermophysical properties vary with volumetric concentration of nanofluids. Therefore, a comprehensive analysis was performed to evaluate the effects on the performance of nanofluids due to variations of density, specific heat, thermal conductivity and viscosity, which are functions of nanoparticle volume concentration. Three metallic oxides, aluminum oxide (Al2O3), copper oxide (CuO), and titanium dioxide (TiO2), dispersed in water as the base fluid were studied. A convenient figure of merit, known as the Mouromtseff number, is used as a base of comparison for laminar and turbulent flows. The results indicated that the considered nanofluids can successfully replace water in specific applications for a single-phase forced convection flow in a tube.

机译：普朗特数、雷诺数和努塞尔数是纳米流体热物理性质的函数，这些数值强烈影响对流换热系数。热物理性质随纳米流体的体积浓度而变化。因此，进行了综合分析，以评估密度、比热、热导率和粘度的变化对纳米流体性能的影响，这些都是纳米颗粒体积浓度的函数。研究了三种金属氧化物，氧化铝（Al2O3）、氧化铜（CuO）和二氧化钛（TiO2），它们分散在水中作为基础流体。一个被称为Mouromtseff数的方便的优值被用作层流和湍流比较的基础。结果表明，所考虑的纳米流体可以在管内单相强制对流的特定应用中成功地替代水。

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《Journal of engineering thermophysics》 |2017年第2期|共11页
作者
Minea A. A.; Moldoveanu M. G.;
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Gheorghe Asachi Tech Univ Bd D Mangeron 63 Iasi 700050 Romania;

Gheorghe Asachi Tech Univ Bd D Mangeron 63 Iasi 700050 Romania;

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正文语种 eng
中图分类热力工程、热机;
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Studies on Al2O3, CuO, and TiO2 Water-Based Nanofluids: A Comparative Approach in Laminar and Turbulent Flow

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