纳米流体的制备和物理性质实验研究

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL
Yan Liu, Mingda Dong, Zhihao Liu, Huichao Gu
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引用次数: 0

摘要

本研究采用两步法制备了CuO、SiC和TiO2三种纳米流体,分析了影响三者稳定性、导热系数、粘度和密度的因素,为强化纳米流体的传热性提供理论参考。首先,本文分析了不同分散剂添加量、磁力搅拌时间和超声振荡时间对纳米流体稳定性的影响,最终选择了制备三种纳米流体的最佳方案。其次,本文测定了三种纳米流体的导热系数、粘度和密度,并探讨了影响其物理性质的因素。三种纳米流体在最高温度下的导热系数分别是最低温度的 2.9 倍、3.2 倍和 1.4 倍。当温度从 25 ℃ 升高到 65 ℃ 时,不同体积浓度的 CuO 纳米流体的粘度下降最大,体积浓度为 0.6% 时粘度下降了 41.3%。纳米流体的密度随温度升高而降低,随体积浓度升高而升高。在 25 °C 时,SiC 纳米流体的密度随体积浓度的增加而增加,增加幅度最大,密度增加了 0.72%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Study on Preparation and Physical Properties of Nanofluids
In this study, three nanofluids, CuO, SiC, and TiO2, are prepared by a two‐step method, and the factors affecting the stability, thermal conductivity, viscosity and density of the three are analyzed, so as to provide theoretical reference for strengthening heat transfer of the nanofluids. First, the effects of different dispersant addition amounts, magnetic stirring time, and ultrasonic oscillation time on the stability of nanofluids are analyzed in this paper, and finally chose the best solution for preparing three nanofluids. Second, the paper determines the thermal conductivity, viscosity, and density of three kinds of nanofluids and explores the factors affecting their physical properties. The thermal conductivity of the three nanofluids at the highest temperature is 2.9, 3.2, and 1.4 times that of the lowest temperature, respectively. When the temperature increased from 25 to 65 °C, the viscosity of CuO nanofluids decreases the most at different volume concentrations, and the viscosity decreases by 41.3% at 0.6% volume concentration. The density of nanofluids decreases with the increase of temperature and increases with the increase of volume concentration. At 25 °C, the density of SiC nanofluid increases the most with the volume concentration, and its density increases by 0.72%.
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来源期刊
Particle & Particle Systems Characterization
Particle & Particle Systems Characterization 工程技术-材料科学:表征与测试
CiteScore
5.50
自引率
0.00%
发文量
114
审稿时长
3.0 months
期刊介绍: Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.
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