Abstract The impacts of SDS-coated NiO nanoparticles, temperature and nanoparticles concentration were investigated on thermal conductivity of nanofluid under permanent and alternative magnetic fields. Three different temperatures of 40, 60 and 80 °C and nanoparticles concentrations in the range of 0.01 to 1%were chosen. The results showed that thermal conductivity of nanofluid varied with increasing nanofluid temperature. Moreover by increasing the volume load in the base-fluid, thermal conductivity increased remarkably. Moreover, by adding SDS to the nanofluid, the stability of the nanoparticles in water improved. In addition, thermal conductivity increased slightly with volume fraction up to 0.1 vol%. However, with more nanoparticles concentration from 0.1 vol% to 1%, the alterations in the thermal conductivity were more tangible. Moreover, the alternative magnetic field led to greater effect on the thermal conductivity. Both alternating and permanent magnetic fields could well help to increase the thermal conductivity of nanofluid.

中文翻译：

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恒定和交替变化磁场影响下含有 SDS 包覆的 NiO 纳米粒子的去离子水的热导率评估

摘要 研究了 SDS 包覆的 NiO 纳米粒子、温度和纳米粒子浓度对永磁和交变磁场下纳米流体热导率的影响。选择了 40、60 和 80 °C 的三种不同温度和 0.01 至 1% 范围内的纳米颗粒浓度。结果表明，纳米流体的热导率随纳米流体温度的升高而变化。此外，通过增加基液中的体积负荷，热导率显着增加。此外，通过向纳米流体中添加 SDS，纳米颗粒在水中的稳定性得到了提高。此外，热导率随体积分数增加到 0.1 vol% 略有增加。然而，随着从 0.1 vol% 到 1% 的更多纳米颗粒浓度，热导率的变化更加明显。而且，交替磁场对热导率的影响更大。交变磁场和永久磁场都可以很好地帮助提高纳米流体的热导率。