从添加纳米粒子改变了液体结构和纳米粒子微运动两个方面,分析了纳米流体强化导热系数的机理,研究表明,相对于在液体中添加毫米或微米级固体粒子以增加导热系数而言,纳米流体强化导热系数的原因主要来自于纳米粒子的微运动,通过测量不同温度下纳米流体的导热系数,验证了纳米粒子微运动是纳米流体强化导热系数的主要因素。 From the addition of nanoparticles to change the liquid structure and the micro-movement of the nanoparticles, the mechanism of nanofluids to strengthen the thermal conductivity is analyzed. The results show that compared with the addition of solid particles in the liquid to increase the thermal conductivity, nano The main reason for the enhanced thermal conductivity of the fluid is the micro-movement of the nano-particles. By measuring the thermal conductivity of the nano-fluid at different temperatures, it is verified that the micro-movement of the nano-particles is the main factor for enhancing the thermal conductivity of the nano-fluid.