Mohammed Zayan Jalal, Rasheed Abdul Khaliq, John Akbar, Khalid Mohammad, Ismail Ahmad Faris, Aabid Abdul, Baig Muneer
Department of Mechanical Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur 50728, Selangor, Malaysia.
Department of New Energy Science and Engineering, School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, Sepang 43900, Selangor, Malaysia.
Materials (Basel). 2021 Dec 21;15(1):28. doi: 10.3390/ma15010028.
This study presents the rheological behavior of water-based GO-TiO-Ag and rGO-TiO-Ag ternary-hybrid nanofluids. The impact of nanoparticles' volumetric concentration and temperature on the rheological properties were studied. All experiments were performed under temperatures ranging from 25 to 50 °C in the solid volume concentration range of 0.5-0.00005%. The data optimization technique was adopted using the Taguchi method. The types of nanomaterials, concentration, temperature, and shear rate were chosen to optimize the viscosity and shear stress. The effect of shear stress, angular sweep, frequency sweep, and damping factor ratio is plotted. The experimental results demonstrated that the rheological properties of the ternary hybrid nanofluid depend on the ternary hybrid nanofluid's temperature. The viscosity of ternary hybrid nanofluids (THNf) change by 40% for GO-TiO-Ag and 33% for rGO-TiO-Ag when temperature and shear rates are increased. All the ternary hybrid nanofluids demonstrated non-Newtonian behavior at lower concentrations and higher shear stress, suggesting a potential influence of nanoparticle aggregation on the viscosity. The dynamic viscosity of ternary hybrid nanofluid increased with enhancing solid particles' volume concentration and temperature.
本研究展示了水基氧化石墨烯-二氧化钛-银和还原氧化石墨烯-二氧化钛-银三元混合纳米流体的流变行为。研究了纳米颗粒的体积浓度和温度对流变性能的影响。所有实验均在25至50°C的温度范围内、0.5 - 0.00005%的固体体积浓度范围内进行。采用田口方法进行数据优化技术。选择纳米材料的类型、浓度、温度和剪切速率来优化粘度和剪切应力。绘制了剪切应力、角频率扫描、频率扫描和阻尼因子比的影响曲线。实验结果表明，三元混合纳米流体的流变性能取决于三元混合纳米流体的温度。当温度和剪切速率增加时，氧化石墨烯-二氧化钛-银三元混合纳米流体（THNf）的粘度变化40%，还原氧化石墨烯-二氧化钛-银三元混合纳米流体的粘度变化33%。所有三元混合纳米流体在较低浓度和较高剪切应力下均表现出非牛顿行为，表明纳米颗粒聚集对粘度有潜在影响。三元混合纳米流体的动态粘度随着固体颗粒体积浓度和温度的升高而增加。
