Erzeugung definierter Suspensionstropfen in einer laminaren Dehnströmung

在先前项目的基础上，应检查在收缩通道几何形状中存在颗粒时非混溶流体的解体行为。技术目标是在系统的高流速下形成含有等量颗粒的大小相等的液滴。粒径比建议在0.1 < dP/dT < 0.5范围内，最小粒径大于0.3 mm。由于这个原因，在高颗粒负荷下，只有少数颗粒被液滴捕获。液滴的形成将在滴落和层流射流破碎区域内进行检查。流体的粘度比和绝对粘度是可以变化的。然而，只有低回流条件Re < 10将被考虑。通过改变颗粒对两种流体相的润湿特性（接触角），颗粒应该迁移到液滴表面，在那里作为具有最高活性的催化剂颗粒。通过对颗粒表面进行化学修饰，可以改变润湿性能。通过对连续流体进行环空去除，可获得高体积分散相含量≥0.4的分散体。然后，这些分散体将在琼脂教授的TCB组C1子项目的毛细管反应器中根据其反应动力学特性进行使用和表征。

Based on the previous projects, the disintegration behavior of non-miscible fluids in presence of particles within a contracting channel geometry shall be examined. Technical goal is the formation of equal sized droplets containing equal numbers of particles at high flow rates of the system. The particle to drop size ratio is proposed within the range of 0.1 < dP/dT < 0.5 with smallest particles larger than 0.3 mm. For that reason also at high particle loads only few particles are entrapped with the droplets. The drop formation is to be examined within the dripping as well as within the laminar jet breakup region. The viscosity ratio of the fluid as well as the absolute viscosity is to be varied. However only low Re-Flow conditions Re < 10 will be considered. By changing the wetting properties (contact angles) of the particles to both of the fluid phases the particles should migrate to the drop surfaces there to act as catalyst particles with mutual highest activity. The wetting properties are to be changed by chemical modification of the particle surfaces. By annular removal of the continuous fluid, dispersions with high volumetric disperse phase content ≥ 0.4 should be achieved. These dispersions will then be used and characterized according to their reaction kinetic properties in capillary reactors within the Sub-Project C1 at the TCB group of Prof. Agar.