Transport and mixing in parametrically excited fluid layers

在所提出的项目中，我们想要比较圆形通道中表面波的实验结果和数值结果。这些波是由移动的障碍物或通道的方位振动产生的。这些研究属于参数波的一类，它在许多力学领域中扮演着重要的角色。这里提出的项目可以被视为在英国电信大学科特布斯-森夫滕贝格的DFG核心设施中心“旋转流物理”进行的试点项目的自然延伸。使用的实验最初是为DFG研究小组“MS-GWaves”设立的。本文提出的项目将研究非线性表面波背景下的输运和混合。重点将集中在孔的碰撞，双层系统中的孔，以及通过非对称强迫产生的非线性波。从动力学的角度来看，钻孔与海啸密切相关。它们一般不那么危险，但它们发生得更频繁，对河流中的泥沙输送和河口渔业很重要。考虑到环境研究中的许多应用，收集和比较更多的实验和数值数据以更好地理解是很重要的。

In the proposed project, we want to compare experimental and numerical results on surface waves in circular channels. The waves are generated by a moving barrier or an azimuthal vibration of the channel. The investigations fall into the class of parametrically generated waves, which play an important role in many areas of mechanics. The project proposed here can be seen as a natural extension of a pilot project carried out at the DFG Core Facility Center "Physics of Rotating Flows" at BTU Cottbus-Senftenberg. An experiment was used which was originally set up for the DFG research group "MS-GWaves". The project proposed here will investigate transport and mixing in the context of nonlinear surface waves. The focus will be on the collision of bores, bores in bilayer systems, and the generation of nonlinear waves by an asymmetric forcing. From the dynamical point of view, bores are closely related to tsunamis. They are generally not as dangerous but they occur much more frequently and are important for sediment transport in rivers and fisheries in estuaries. Given the many applications in environmental research, it is important to collect and compare more experimental and numerical data for a better understanding.