论文标题
对电流动流体中链形成动力学的系统研究
A systematic study of the dynamics of chain formation in electrorheological fluids
论文作者
论文摘要
我们报告了使用Brownian Dynamics模拟的电流动（ER）流体中链形成动力学的系统研究。系统的参数，例如施加的电场，极化性，偶极矩，摩擦系数和数量密度以简化的单位表示，并在较大范围内更改，以将系统的行为映射为它们的函数。我们定义了从双指数拟合获得的时间常数与各种物理量的时间依赖性，例如偶极能，扩散常数和平均链长。较小的时间常数与较短链的形成（对，三重态等）的形成有关，而较大的时间常数与超过模拟单元格的那些链式中更长的链的形成有关。我们使用的近似值是，偶极矩仅像文献中一样由施加的电场诱导。但是，我们报告了粒子粒子极化也可能发生的情况的初步结果。
We report a systematic study of the dynamics of chain formation in electrorheological (ER) fluids using Brownian Dynamics simulations. The parameters of the system such as applied electric field, polarizability, dipole moment, friction coefficient, and number density are expressed in reduced units and changed in a wide range in order to map the system's behavior as a function of them. We define time constants obtained from bi-exponential fits to time dependence of various physical quantities such as dipolar energy, diffusion constant, and average chain length. The smaller time constant is associated with the formation of shorter chains (pairs, triplets, and so on), while the larger time constant is associated with the formation of longer chains in the regime of those that overarch the simulation cell. We use the approximation that the dipole moments are induced by the applied electric field only, as usual in the literature. However, we report preliminary results for the case when particle-particle polarization is also possible.
