纳米颗粒
微尺度化学
材料科学
界面热阻
传热
无定形固体
热阻
分子动力学
粒子(生态学)
化学物理
复合材料
热的
半径
纳米技术
化学工程
热力学
化学
结晶学
计算化学
工程类
数学教育
地质学
物理
海洋学
计算机科学
计算机安全
数学
作者
Fanhe Meng,Muftah Elsahati,Jin Liu,R. F. Richards
摘要
Nanoparticle-based materials have been used as thermal insulation in a variety of macroscale and microscale applications. In this work, we investigate the heat transfer between nanoparticles using non-equilibrium molecular dynamics simulations. We calculate the total thermal resistance and thermal boundary resistance between adjacent amorphous silica nanoparticles. Numerical results are compared to interparticle resistances determined from experimental measurements of heat transfer across packed silica nanoparticle beds. The thermal resistance between nanoparticles is shown to increase rapidly as the particle contact radius decreases. More significantly, the interparticle resistance depends strongly on the forces between particles, in particular, the presence or absence of chemical bonds between nanoparticles. In addition, the effect of interfacial force strength on thermal resistance increases as the nanoparticle diameter decreases. The simulations results are shown to be in good agreement with experimental results for 20 nm silica nanoparticles.
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