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首页> 外文期刊>International Journal of Heat and Mass Transfer >Synthesized CuFe_2O_4/SiO_2 nanocomposites added to water/EG: Evaluation of the thermophysical properties beside sensitivity analysis & EANN
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Synthesized CuFe_2O_4/SiO_2 nanocomposites added to water/EG: Evaluation of the thermophysical properties beside sensitivity analysis & EANN

机译:添加到水/ EG中的合成的CuFe_2O_4 / SiO_2纳米复合材料:除了敏感性分析和EANN之外,还可以评估热物理性质

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摘要

The new nanocomposite material of CuFe2O4 (copper ferrite) nanoparticles coated by SiO2 is synthesized. Then, this newly generated nanocomposite is dispersed in water/ethylene glycol (60:40) to make a new homogeneous nanofluid in order to avoid settling and agglomeration. Through suitable accurate experiments, density, viscosity and electrical conductivity of the mixture are measured at various temperatures and nanoparticles concentrations. Besides we empirical correlations for the same parameters developed via the curve fitting method. To have a better statistical view, the optimization procedure based on the enhanced artificial neural network (EANN), developed at present study, is performed. Furthermore, according to the obtained empirical results, the sensitivity analysis is provided and the margin of deviations is represented for each proposed correlation. Generation, stabilization and measuring the density, viscosity and electrical conductivity of the newly mentioned nanofluid, make present work different from the previous ones in this field. The highest amount of relative electrical conductivity is observed at T = 75 degrees C and phi = 0.02 (g/mL); however, the case of T = 30 degrees C and phi = 0.02 (g/mL) represents the maximum value of relative viscosity. Moreover, density is decreased by temperature augmentation, through all cases. (C) 2018 Elsevier Ltd. All rights reserved.
机译:合成了新型的SiO2包覆的CuFe2O4(铜铁氧体)纳米颗粒纳米复合材料。然后,将这种新生成的纳米复合材料分散在水/乙二醇(60:40)中,制成新的均匀纳米流体,以避免沉淀和团聚。通过适当的精确实验,可以在各种温度和纳米颗粒浓度下测量混合物的密度,粘度和电导率。此外,我们通过曲线拟合方法得出的相同参数的经验相关性。为了获得更好的统计视图,执行了基于当前研究开发的增强型人工神经网络(EANN)的优化程序。此外,根据获得的经验结果,提供了灵敏度分析,并为每个建议的相关性表示了偏差的余量。新提到的纳米流体的产生,稳定化和测量密度,粘度和电导率,使得目前的工作不同于该领域中的先前工作。在T = 75摄氏度和phi = 0.02(g / mL)时观察到最高的相对电导率;但是,T = 30℃,phi = 0.02(g / mL)时,是相对粘度的最大值。此外,在所有情况下,密度都会因温度升高而降低。 (C)2018 Elsevier Ltd.保留所有权利。

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