Interaction of fluid flow and phase change in ternary systems

经典流体力学关注的是纯液体。相比之下，本项目的主题是三元液体的流体动力学，显示相变，在技术上有各种应用。为了获得对这类系统的基本理解，我们想要进行控制实验，并伴随尺度关系的发展。更具体地说，我们将重点放在共流装置上，其中二元液体被喷射到第三种液体中（反之亦然）。液体的选择使得在溶剂交换过程中液滴成核（“乌佐效应”）。第一个目标是获得可控和可复制的流型。这些是我们想要理解的，其中包括建立两相流型与相应的流体性质和操作参数之间的关系。在此基础上，我们计划确定我们观察到的一些关键现象背后的控制参数和缩放关系。对于选定的流动现象，我们计划与合作伙伴一起进行数值模拟。最后，我们还想探索这种两相流的潜在应用。

Classical hydrodynamics focuses on pure liquids. By contrast, the subject of this project is the fluid dynamics of ternary liquids, displaying phase transitions, which has various applications in technology. To gain fundamental understanding of such systems, we want to perform controlled experiments, accompanied by the development of scaling relations. More specifically, we will focus on a co-flow device, in which a binary liquid is jetted into a third liquid (or vice versa). The liquids are chosen such that in a solvent-exchange procedure droplets nucleate (“ouzo effect”). The first objective is to obtain controllable and reproducible flow patterns. These we want to understand, which includes establishing a relationship between the two-phase flow patterns and the corresponding fluid properties and operation parameters. Based on that, we plan to identify control parameters and scaling relationships underlying some of the key phenomena we have observed. For selected flow phenomena, we plan to conduct numerical simulations together with a cooperation partner. Finally, we also want to explore potential applications of such two-phase flows.