论文标题
注意在均匀电场中表面活性剂覆盖液的成对相互作用
Note on the pairwise interactions of surfactant-covered drops in a uniform electric field
论文作者
论文摘要
我们研究了基于边界积分公式和分析理论的数值模拟的组合，研究表面活性剂对均匀DC电场中滴液的成对相互作用的影响，假设降液变形较小。假定表面活性剂不溶于整体液体。我们表明，表面活性剂削弱了电水力动力学流动，因此与清洁滴相比，介电性相互作用在表面活性剂覆盖的滴动力学中起着更为突出的作用。如果降液电导率与悬浮液相同，则非染料表面活性剂可以阻止滴剂的相对运动，从而有效防止合并。
We study the effect of surfactant on the pairwise interactions of drops in an applied uniform DC electric field using a combination of numerical simulations based on a boundary integral formulation and an analytical theory assuming small drop deformations. The surfactant is assumed to be insoluble in the bulk-phase fluids. We show that the surfactant weakens the electrohydrodynamic flow and thus dielectrophoretic interactions play more prominent role in the dynamics of surfactant-covered drops compared to clean drops. If drop conductivity is the same as the suspending fluid, a nondiffusing surfactant can arrest the drops' relative motion thereby effectively preventing coalescence.
