回流驱动下对撞机中粒子的非弹性碰撞和各向异性聚集
Inelastic collisions and anisotropic aggregation of particles in a nematic collider driven by backflow
摘要：
我们设计了一个用于控制球形胶体颗粒的非平衡各向异性聚集的对撞机。周围的环境赋予球之间的偶极相互作用。在周期性电场中，双折射液晶（NLC）的双向回流迫使球体彼此碰撞。非弹性碰撞有两种类型，头对头和头对头。偶极子的头-尾碰撞导致纵向聚集，而头-头碰撞促进横向聚集。头对头碰撞的频率由影响参数设定，该影响参数允许人们控制聚集体的所得形状、其各向异性和分形维数。
英文摘要：
We design a nematic collider for controlled out-of-equilibrium anisotropic aggregation of spherical colloidal particles. The nematic surrounding imparts dipolar interactions among the spheres. A bidirectional backflow of the nematic liquid crystal (NLC) in a periodic electric field forces the spheres to collide with each other. The inelastic collisions are of two types, head-to-tail and head-to-head. Head-to-tail collisions of dipoles result in longitudinal aggregation while head-to-head collisions promote aggregation in the transversal direction. The frequency of head-to-head collisions is set by the impact parameter that allows one to control the resulting shape of aggregates, their anisotropy and fractal dimension.
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