Stereoscopic measurements of liquid film flims on textured inclined plates

在这个更新方案中，将研究微观和宏观结构对液膜流动的流体动力学的影响。这种液膜流动被广泛应用于能源和化工过程中。与光滑的液膜相比，波状界面的液侧传质能力更强。微结构表面的应用引起了垂直于主流分量的速度分量的诱导，从而导致进一步的传质强化。这促进了液体区域附近壁面的混合。这些相互作用发生在工业用规整填料上，液体在填料不同局部倾斜角的宏观结构上流动，导致复杂的流体动力学，这对塔中使用的分离内件的成功至关重要。这种关系应该在本更新方案的框架内进行系统的详细研究。因此，将使用在第一个供资期间开发的测量技术进行试验性调查。首先，应对具有平面宏观结构的开式填料通道进行流体动力学表征，然后进一步研究微观结构对宏观结构对液体流动的影响。在其他工作组件中，还应对封闭填料通道进行这些研究，以了解微观和宏观结构对液膜流动的流体动力学影响的基本知识。

In this renewal proposal the influence of micro and macro structures on the fluid dynamics of liquid film flow will be investigated. Such liquid film flow is applied in a wide range of energy- and chemical engineering processes. e.g. distillation processes, where the liquid flows downwards on micro and macro structured surfaces with a countercurrent gas phase.Compared to a smooth liquid film the liquid side mass transport of a wavy interface is enhanced. The application of micro structured surfaces causes further mass transfer intensification due to the induction of velocity components perpendicular to the main flow component. This promotes the mixing of the wall near region of the liquid. These interactions occur on industrial used structured packings by the liquid flow over the macro structures in different local inclination angels of the packing, resulting in a complex fluid dynamics that are crucial for the success of the separation internals used in a column.This relationship should be investigated systematically in detail within the framework of this renewal proposal. Therefore experimental investigations will be carried out using the measurement technique developed in the first funding period. In a first step, the open packing channel with planar macro structures should be fluid dynamically characterized, and in a further step the influence of micro structures on the macro structures to the liquid flow should be examined in more detail. In additional working packages, these investigations should also be carried out for the closed packing channel to get fundamental knowledge about the fluid dynamic influence of micro and macro structures to liquid film flow.