Separation of oceanic boundary layers.

本文的目的是研究分离尾流中海洋边界层分离和混合的动力学。将采用一种新的理论框架来量化旋转、层结、涡拉伸和海岸线曲率对边界层分离的竞争性贡献。该项目还将开发一种基于非结构化动态自适应网格的新型数值模型。这个模型是令人兴奋的，因为它提供了一个机会，明确解决边界层在相对较低的耗散制度有关的海洋。最初的计算将针对沿沿着垂直海岸线的二维旋转流，以及可变海底地形上的二维分层流。随后我们将考虑沿着各种几何形状的倾斜侧壁的旋转和分层的三维流动。将考虑的应用包括墨西哥湾流、西部深层边界海流、Aghulas海流和地中海暗流。边界层的不充分解决或参数化的影响也将在一个绑定的学生调查。

This proposal is to study the dynamics of oceanic boundary layer separation and mixing in the separated wakes. A new theoretical framework will be employed to quantify the competing contributions of rotation, stratification, vortex stretching and coastline curvature to boundary layer separation. The project will also exploit a novel numerical model based on an unstructured, dynamically-adaptive mesh. This model is exciting because it offers the chance to explicitly resolve the boundary layers in relatively low-dissipation regimes relevant to the ocean. Initial calculations will be for two-dimensional rotating flow along vertical coastlines, and two-dimensional stratified flow over variable bottom topography. Subsequently we will consider three-dimensional flows with both rotation and stratification along sloping sidewalls of various geometrical configurations. Applications to be considered include the Gulf Stream, the Deep Western Boundary Current, the Aghulas Current and the Mediterranean Undercurrent. The impact of either inadequately resolving or parameterising the boundary layer will also be investigated within a tied studentship.