Over the last years, tremendous efforts were dedicated to develop new heat transfer fluids. So, the research on this topic was later on focused on nanofluids, ionanofluids, molten salts and new refrigerants. This article explores two mono-component and one bi-component nanofluid and, to be more specific, it deals with the viscosity study of stabilized Al₂O₃, SiO₂ water based nanofluids and their hybrid (Al₂O₃ + SiO₂ nanoparticles diluted in water). Experimental research showed a non-Newtonian behavior of all tested nanofluids. Alumina nanofluids and the two studied hybrid nanofluids have shear-thinning behavior and silica nanofluid have a shear thickening behavior. More exactly, the overall relative viscosity is higher for alumina nanofluids if compared to SiO₂ nanofluid and, by replacing 0.5% of SiO₂ with alumina, the viscosity increases if compared to results for SiO₂ nanofluid. Few correlations are proposed for a better estimation of the viscosity for Al₂O₃, SiO₂ water based nanofluids. Plus, the viscosity variation with temperature was experimentally studied for the case of hybrid nanofluids, underlying the decreasing of viscosity while temperature rise and the low hysteresis behavior while proposing two equations for the viscosity variation as temperature was increasing.

在过去的几年中，致力于开发新的传热流体。因此，有关该主题的研究后来集中在纳米流体，离子流体，熔融盐和新型制冷剂上。本文探讨了两种单组分和一种双组分纳米流体，更具体地说，它涉及稳定化的Al ₂ O ₃，SiO ₂水性纳米流体及其杂化物（Al ₂ O ₃  + SiO _2）的粘度研究。纳米粒子在水中稀释）。实验研究表明，所有测试的纳米流体都具有非牛顿特性。氧化铝纳米流体和两种研究的混合纳米流体具有剪切稀化行为，而二氧化硅纳米流体具有剪切增稠行为。更准确地说，如果比较对于SiO整体相对粘度为氧化铝纳米流体更高₂纳米流体和，通过用二氧化硅的0.5％₂与氧化铝，粘度增加，如果比较结果的SiO ₂纳米流体。为了更好地估计Al ₂ O ₃，SiO ₂的粘度，提出了一些相关性水基纳米流体。另外，对于杂化纳米流体的情况，通过实验研究了粘度随温度的变化，其基础是温度升高时粘度降低和低滞后行为，同时提出了随温度升高粘度变化的两个方程式。