Inelastic X-ray scattering was performed for copper/ethylene glycol nanofluid at 298 K. The collective excitation of the solvent was analyzed by a generalized Langevin equation. The thermal diffusion coefficient and μ(fast)- and α(structure)-relaxations of the solvent for the nanofluid are larger and faster than those of pure liquid, respectively. The high-frequency sound velocity obtained from momentum transfer dependence of a maximum in the longitudinal current-current correlation function increases with increasing the number of copper nanoparticles. The enhanced thermal conductivity of copper/ethylene glycol nanofluid could be related to the solvent dynamics.

中文翻译：

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铜/乙二醇纳米流体非弹性X射线散射的广义Langevin分析

在298 K下对铜/乙二醇纳米流体进行非弹性X射线散射。通过广义Langevin方程分析溶剂的集体激发。纳米流体的溶剂的热扩散系数和μ（快速）-和α（结构）-松弛分别比纯液体大和快。从纵向电流-电流相关函数中的最大值的动量传递相关性获得的高频声速随着铜纳米颗粒的数量的增加而增加。铜/乙二醇纳米流体的导热性增强可能与溶剂动力学有关。