Bleibel J, Domínguez A, Günther F, Harting J, Oettel M
Max-Planck-Institut für Intelligente Systeme, Heisenbergstr. 3, 70569 Stuttgart, Germany.
Soft Matter. 2014 May 7;10(17):2945-8. doi: 10.1039/c3sm53043d.
Under partial confinement, the motion of colloidal particles is restricted to a plane or a line but their dynamics is influenced by hydrodynamic interactions mediated by the unconfined, three-dimensional flow of the embedding fluid. We demonstrate that this dimensionality mismatch induces a characteristic divergence in the collective diffusion coefficient of the colloidal subsystem. This result, independent of the specific interparticle forces in the colloid, is solely due to the kinematical constraint on the colloidal particles, and it is different from the known divergence of transport coefficients in purely one or two-dimensional fluids.
在部分受限的情况下，胶体粒子的运动被限制在一个平面或一条直线上，但其动力学受到由周围流体的无约束三维流动介导的流体动力学相互作用的影响。我们证明，这种维度不匹配会导致胶体子系统的集体扩散系数出现特征性发散。这一结果与胶体中特定的粒子间作用力无关，完全是由于对胶体粒子的运动学约束，并且它不同于纯一维或二维流体中已知的输运系数发散情况。
