纳米颗粒表面修饰对纳米流体粘度的影响

纳米流体的黏度受流体温度、纳米颗粒粒径、纳米颗粒浓度等多方面的影响。在前人的研究中,黏度随流体温度的增加而减小,随纳米颗粒粒径的增加而减小,随纳米颗粒浓度的增加而增大,但黏度随纳米颗粒浓度的增大程度不同。通过总结大量不同情况下纳米流体的黏度数据,分析纳米流体黏度随纳米颗粒浓度的增加与纳米颗粒表面性质的关系。分析结果表明:纳米颗粒的添加增加基础流体的黏度;且亲水型纳米颗粒比疏水型纳米颗粒与水形成的纳米流体的黏度高。通过对纳米颗粒表面性质的修饰,可以控制纳米流体黏度的变化,从而影响流体输送过程中的能耗。

Effect of different surface properties of nanoparticles on the viscosity of nanofluids

The viscosity of nanofluids is affected by temperature, size of nanoparticle and concentration of nanoparticle. Researches show that, the viscosity decreases with the increase of temperature and the size of nanoparticle, and increase with the increase the concentration of nanoparticles, but the enhancement of viscosity with different surface properties nanoparticles is different. By analyzing the relationship between the viscosity of nanofluids and the surface properties of nanoparticles, the viscosity of nanofluids was analyzed. The results show that the addition of nanoparticles increases the viscosity of the base fluid, and the viscosity of hydrophilicity particles-DIW nanafluids is higher than that of hydrophobicity particles-DIW nanafluids. Through the modification of the surface properties of nanoparticles, the viscosity of nanofluids can be controlled, finally affect the energy consumption of fluid transportation.