发帖
雷达卡
摘要翻译：
利用分子模拟方法，研究了聚合物刷在Couette和Poiseuille流动下与显性溶剂接触的性质。溶剂由化学上相同的链组成。我们给出的证据表明，在密刷中单独的、未纠缠的链表现出循环的、翻滚的运动和分子取向的非高斯涨落，类似于剪切流中孤立的栓系链的行为。在刷涂表面附近，分子的集体运动引起水动力流动方向的反转。利用Couette流和Poiseuille流，我们研究了刷涂表面的影响可以用Navier滑移条件描述到什么程度。
---
英文标题：
《Cyclic motion and inversion of surface flow direction in a dense polymer
brush under shear》
---
作者：
M. M\"uller and C. Pastorino
---
最新提交年份：
2007
---
分类信息：
一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
--
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
--
---
英文摘要：
Using molecular simulations, we study the properties of a polymer brush in contact with an explicit solvent under Couette and Poiseuille flow. The solvent is comprised of chemically identical chains. We present evidence that individual, unentangled chains in the dense brush exhibit cyclic, tumbling motion and non-Gaussian fluctuations of the molecular orientations similar to the behaviour of isolated tethered chains in shear flow. The collective molecular motion gives rise to an inversion of hydrodynamic flow direction in the vicinity of the brush-coated surface. Utilising Couette and Poiseuille flow, we investigate to what extend the effect of a brush-coated surface can be described by a Navier slip condition.
---
PDF链接：
https://arxiv.org/pdf/708.4245
京公网安备 11010802022788号
