论文标题
粒子对和惯性微流体的训练
Particle pairs and trains in inertial microfluidics
论文作者
论文摘要
交错的线性多粒子列车构成了惯性微流体的特征结构。使用晶格 - 玻尔兹曼模拟，我们在流经微流体通道时研究了它们的性质和稳定性。我们通过显示它们如何收缩或扩展到其平衡轴向距离来确认跨流线对的稳定性。相比之下，相同的流线对迅速扩展到特征性的分离，但即使在长时间慢慢散开。我们在实验中测量了粒子距离及其特征峰的分布。 由于集体阻力减少，轴向粒子间距大于平衡距离合同的交错多粒子列车初始化的轴向粒子间距大于平衡距离。线性粒子序列（类似于对，它们）迅速扩展到交错列车的平衡距离的两倍，然后非常缓慢地不均匀地漂移。同样，我们重现了粒子距离的统计数据和在实验中观察到的特征峰。最后，我们彻底分析了通过交错列车作为微流体声子作为微流体声子行进的阻尼位移脉冲，并显示缺陷如何严重抑制其传播。
Staggered and linear multi-particle trains constitute characteristic structures in inertial microfluidics. Using lattice-Boltzmann simulations, we investigate their properties and stability, when flowing through microfluidic channels. We confirm the stability of cross-streamline pairs by showing how they contract or expand to their equilibrium axial distance. In contrast, same-streamline pairs quickly expand to a characteristic separation but even at long times slowly drift apart. We reproduce the distribution of particle distances with its characteristic peak as measured in experiments. Staggered multi-particle trains initialized with an axial particle spacing larger than the equilibrium distance contract non-uniformly due to collective drag reduction. Linear particle trains, similar to pairs, rapidly expand towards a value about twice the equilibrium distance of staggered trains and then very slowly drift apart non-uniformly. Again, we reproduce the statistics of particle distances and the characteristic peak observed in experiments. Finally, we thoroughly analyze the damped displacement pulse traveling as a microfluidic phonon through a staggered train and show how a defect strongly damps its propagation.
