纳米流体强化导热系数机理初步分析

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。

A Preliminary Analysis of the Intensified Thermal-conductivity Mechanism of Nano-fluids

The mechanism of an intensified thermal conductivity achieved through the use of nano fluids is analyzed from the following two aspects, namely, a changed liquid structure due to the addition of nano particles and the micro motion of nano fluids. The results of the analysis indicate that relative to the enhanced thermal conductivity effected by the addition in fluids of millimeter or micrometer grade particles the enhanced thermal conductivity made possible by nano fluids has come about mainly due to the micro motion of the nano particles. Through the measurement of the thermal conductivity of nano fluids under various temperatures it has been verified that the micro motion of the nano particles represents a major factor contributing to the enhancement of thermal conductivity by the nano fluids.