Colloid-colloid and colloid-wall interactions in driven suspensions.
Colloid-colloid and colloid-wall interactions in driven suspensions.
复制标题
驱动悬浮液中的胶体-胶体和胶体-壁相互作用。
DOI：
--
复制
发表时间：
2007
影响因子：
4.4
通讯作者：
M. Rauscher
中科院分区：
文献类型：
--
作者：
M. Krüger;M. Rauscher
我们调查的非平衡流体结构介导的两个胶体之间的驱动力通过相互不相互作用的布朗粒子的悬浮液，以及在静止的情况下，胶体和壁之间。我们解决Smoluchowski方程在双球坐标系中，以及与反射的方法，无论是在线性近似的小速度和数值中间速度，我们比较的结果，以前考虑的叠加近似。特别是，我们发现一个增强的摩擦（相比于一个孤立的颗粒上的摩擦），两个胶体驱动并排以及为一个胶体沿沿着的墙壁。减少了尾涂胶体上的摩擦。并排行进的胶体经历溶质诱导的排斥，而尾随的胶体彼此吸引。
We investigate the nonequilibrium fluid structure mediated forces between two colloids driven through a suspension of mutually noninteracting Brownian particles as well as between a colloid and a wall in stationary situations. We solve the Smoluchowski equation in bispherical coordinates as well as with a method of reflections, both in linear approximation for small velocities and numerically for intermediate velocities, and we compare the results to a superposition approximation considered previously. In particular, we find an enhancement of the friction (compared to the friction on an isolated particle) for two colloids driven side by side as well as for a colloid traveling along a wall. The friction on tailgating colloids is reduced. Colloids traveling side-by-side experience a solute induced repulsion while tailgating colloids are attracted to each other.