arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.00569physics.flu-dyncond-mat.soft
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固液界面小粗糙度下受限液体的滑移长度

Slip length of confined liquid with small roughness of solid-liquid interfaces

Li Wan, Yunmi Huang

摘要:

研究了固液界面粗糙度较小的受限液体的滑移长度。应用并矢格林函数和微扰展开法定量地得到了滑移长度。在滑移长度中,涉及界面粗糙度和液体与固体表面之间的化学相互作用的影响。在数值计算中,采用蒙特卡罗方法模拟粗糙界面,统计得到界面上的物理量。结果表明,体系的总滑移长度与化学相互作用贡献的滑移长度成线性关系。界面粗糙度起比例因子的作用。对于粗糙度,粗糙度的方差减小了滑移长度,而粗糙度的相关长度可以显著增加滑移长度,达到饱和值。

英文摘要:

We have studied the slip length of confined liquid with small roughness of solid-liquid interfaces. Dyadic Green function and perturbation expansion have been applied to get the slip length quantitatively. In the slip length, both effects of the roughness of the interfaces and the chemical interaction between the liquid and the solid surface are involved. For the numerical calculation, Monte Carlo method has been used to simulate the rough interfaces and the physical quantities are obtained statistically over the interfaces. Results show that the total slip length of the system is linearly proportional to the slip length contributed from the chemical interaction. And the roughness of the interfaces plays its role as the proportionality factor. For the roughness, the variance of the roughness decreases the total slip length while the correlation length of the roughness can enhance the slip length dramatically to a saturation value.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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