Systematic studies of foam prevention and inhibition by identification of interfaces-non-existence domains and their realization by means of adaptive design of column random fillers and packs

它旨在通过对精细化学以及食品和饮料技术的“功能”柱装置中的局部热流体动力学过程进行系统的实验和模拟研究，为预防和抑制不良泡沫做出贡献。重点在于倾倒式元件和结构填料，其主要用于气体和液体之间的材料和热能的有效传输，例如，在萃取、吸收、蒸馏和精馏逆流塔中。当气体从塔底流向塔盖时，液体沿相反方向流动，作为滴流膜，或沿着沿着功能元件表面的细流。这通常会导致形成不需要的泡沫。化学抑泡剂无法解决问题，因为它们会危及化学产品以及食品和饮料的纯度。这里计划进行的研究考虑了倾倒式元件和结构填料长度尺度上的纯机械泡沫形成。计划中的系统调查的重点在于通过被动物理措施来预防和抑制不希望的泡沫，这些措施的基础是确定不存在气体夹杂物和泡沫的区域。当净泡沫平衡为负值且（广义）Deborah数非常高时，会出现这种情况。不存在域的建议识别假设，毛细机械效应中起着至关重要的作用，界面的稳定性，因此，在包含气体。调查开始与静态的情况下，并考虑零发展阶段的基础上解决方案的高斯-杨-拉普拉斯方程的接口，只存在于某些领域的元素。这些包括具有高稳定性的毛细作用占主导地位的界面，这使得气泡的形成非常困难或不可能。在所提出的理论的背景下，电流在滴流膜和溪流被认为是静态平衡的干扰。通过检查界面的能级和稳定性，可以估计产生泡沫所需的新界面的趋势。这适用于层流和湍流状态，文献提供了相应的标准。基于被动泡沫管理的研究结果和方法，拟虚拟设计和实验测试新的功能性柱固定装置。基于Pareto的遗传算法在迭代开发周期中提供必要的数学优化。

It intends to contribute to the prevention and inhibition of undesirable foams by means of systematic experimental and simulative studies on local thermos fluid dynamic processes in "functional" column installations of fine chemistry as well as food and beverage technology. The focus lies on dumped-type elements and structure packings which serve the effective transport of material and thermal energy between mostly a gas and a liquid, for example, in extraction, absorption, distillation and rectification counter-current columns. As the gas flows from the column floor to the lid, the liquid flows in the opposite direction as a trickle film, or a rivulet along the surface of the functional elements. This causes regularly a formation of unwanted foam. Chemical foam inhibitors provide no solution because they endanger the purity of chemical products as well as foodstuffs and beverages.The studies planned here consider purely mechanical foam formation on the length scale of dumped-type elements and structure packings. The focus of the planned systematic investigations lies on the prevention and inhibition of undesirable foams by passive physical measures based on the identification of domains, in which gas inclusions and, therefore, foams do not exist. This condition occurs when the net foam balance takes on negative and the (generalized) Deborah number very high values. The proposed identification of the non-existence domain postulates that capillary-mechanical effects play an essential role in the stability of interfaces and, thus, in the inclusion of gases. The investigations start with the static case and consider elements of the zero development stage based on solutions of the Gauss-young-Laplace equation for interfaces that exist only in certain domains. These include capillary-dominated interfaces with high stability that make the formation of bubbles very difficult or impossible. In the context of a proposed theory, currents in the trickle films and rivulets are considered as disturbances of the static equilibrium. By checking the energy level and the stability of the interface, the tendency to create new interfaces as required for the generation of foams can be estimated. This applies to both the laminar and the turbulent state, for which the literature provides corresponding criteria. Based on the findings and methods to be developed regarding passive foam management, it is intended to virtually design and experimentally test new functional column fixtures. Pareto-based genetic algorithms provide the necessary mathematical optimization in iterative development cycles.