论文标题
液晶流中可控的颗粒迁移
Controllable particle migration in liquid crystal flows
论文作者
论文摘要
我们观察到在列液晶的微通道流中胶体颗粒的新型位置控制。晶格Boltzmann模拟显示了多个平衡粒子位置，其存在和位置可使用驱动压力调节，与各向同性液体中经典的Segre-Silberberg效应直接形成鲜明对比。另外，列在列的流动中的粒子迁移更快地发生了数量级。这些新的平衡是通过弹性力，流体动力提升和阻力以及通过粒子周围的缺陷结构的平衡来确定的。
We observe novel positional control of a colloidal particle in microchannel flow of a nematic liquid crystal. Lattice Boltzmann simulations show multiple equilibrium particle positions, the existence and position of which are tunable using the driving pressure, in direct contrast to the classical Segre-Silberberg effect in isotropic liquids. In addition, particle migration in nematic flow occurs an order of magnitude faster. These new equilibria are determined through a balance of elastic forces, hydrodynamic lift and drag as well as order-flow interactions through the defect structure around the particle.
