This article presents an experimental study on the effect of temperature and solid volume fraction of nanoparticles on the dynamic viscosity for the CuO/EG-water nanofluid. nanoparticles with diameter of 40 nm are used in the present study to prepare nanofluid by two-step method. A “Brookfield viscometer” has been used to measure the dynamic viscosity of nanofluid with solid volume fraction up to 2% at the temperature range between 20 to 60 oC. The finding shown that, dynamic viscosity of nanofluid increases with increase in particle volume fraction and decrease in temperature. Nine different correlations are developed on experimental data point to predict the relative dynamic viscosity of nanofluid at different temperatures. due to making sure about accuracy of the proposed correlations, margin of deviation is presented at the end of this study. The result show excellent agreement between experimental data with those obtained by the correlations.

中文翻译：

---

乙二醇-水纳米流体在不同温度和不同固体浓度下的粘度的实验研究和新的相关性

本文提供了实验研究温度和纳米粒子的固体体积分数对CuO / EG-水纳米流体的动态粘度的影响。本研究中使用直径为40 nm的纳米颗粒通过两步法制备纳米流体。“ Brookfield粘度计”已用于测量在20至60 oC的温度范围内固体体积分数高达2％的纳米流体的动态粘度。该发现表明，纳米流体的动态粘度随着颗粒体积分数的增加和温度的降低而增加。在实验数据点上开发了九种不同的相关性，以预测纳米流体在不同温度下的相对动态粘度。由于要确保所提出的相关性的准确性，因此在研究结束时会提出偏差幅度。