Weeber R, Harting J
Institute for Computational Physics, University of Stuttgart, Pfaffenwaldring 27, D-70569 Stuttgart, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Nov;86(5 Pt 2):057302. doi: 10.1103/PhysRevE.86.057302. Epub 2012 Nov 9.
In dense colloids it is commonly assumed that hydrodynamic interactions do not play a role. However, a found theoretical quantification is often missing. We present computer simulations that are motivated by experiments where a large colloidal particle is dragged through a colloidal crystal. To qualify the influence of long-ranged hydrodynamics, we model the setup by conventional Langevin dynamics simulations and by an improved scheme with limited hydrodynamic interactions. This scheme significantly improves our results and allows to show that hydrodynamics strongly impacts the development of defects, the crystal regeneration, as well as the jamming behavior.
在致密胶体中，通常认为流体动力学相互作用不起作用。然而，往往缺少已有的理论量化。我们展示了受实验启发的计算机模拟，实验中一个大的胶体粒子被拖过一个胶体晶体。为了确定长程流体动力学的影响，我们通过传统的朗之万动力学模拟和一种具有有限流体动力学相互作用的改进方案对该装置进行建模。该方案显著改善了我们的结果，并能够表明流体动力学强烈影响缺陷的发展、晶体再生以及堵塞行为。
