论文标题
在带有颗粒的液体中添加表面活性剂的沉淀
Sedimentation of a surfactant-laden drop in a liquid with particles
论文作者
论文摘要
该项目旨在研究带有颗粒液体中表面活性剂的沉积。使用MATLAB进行2D模拟。该接口是通过前跟踪方法捕获的。局部粘度取决于遵循功率定律的局部粒子浓度。表面活性剂不仅会降低表面张力，还会诱导表面张力梯度。如果表面张力降低，则由于液滴的变形较大（即，液滴变得更平坦），沉降速度将降低。此外，由于较大的表面张力梯度，增加了表面活性剂的小子数（对流与界面上的扩散之比）将降低沉降速度。
This project aims to study the sedimentation of a surfactant-laden drop in a liquid with particles. A 2D simulation is performed with MATLAB. The interface is captured by the front-tracking method. The local viscosity depends on the local particle concentration, which follows a power law. The surfactants not only decrease the surface tension but also induce a surface tension gradient. If the surface tension decreases, the settling velocity will decrease due to a larger deformation of the drop (i.e., the drop becomes more flat). Additionally, increasing the Peclet number (ratio of convection to diffusion on the interface) for surfactants will reduce the settling velocity due to a larger surface tension gradient.
