Effect of hydration layer and surface wettability in enhancing thermal conductivity of nanofluids
Effect of hydration layer and surface wettability in enhancing thermal conductivity of nanofluids
复制标题
水化层和表面润湿性对增强纳米流体导热性的影响
DOI：
10.1063/1.3270003
复制
发表时间：
2009
影响因子：
4
通讯作者：
Ranganathan Kumar
中科院分区：
文献类型：
--
作者：
P. Sachdeva;Ranganathan Kumar
在水基纳米流体的分子动力学研究中，我们发现在颗粒-流体界面形成水合层，液体分子之间的吸引力或内聚势在其中占主导地位。在水化层中，碰撞模式而不是动力学或势模式是纳米流体热输运性质增强的主要原因，因为它导致更多的相互作用。研究发现，润湿颗粒的导热系数高于中性或非润湿颗粒。
In a molecular dynamics study of water based nanofluids, we show that a hydration layer is formed at the particle-fluid interface, where the attraction or cohesive potential between the liquid molecules is dominant. In the hydration layer, the collision mode rather than the kinetic or potential mode is primarily responsible for the enhancement of thermal transport properties in nanofluids, as it results in more interactions. The thermal conductivity for a wetting particle is found to be higher than for a neutral or a nonwetting particle.