使用ADCIRC模型模拟奥斯陆峡湾的流体动力学
Modeling the Hydrodynamics in the Oslofjord using an Advanced Circulation Model
- The Norwegian University of Life Sciences（挪威生命科学大学）
- Norwegian Meteorological Institute（挪威气象研究所）
- University of Notre Dame（圣母大学）
- Simula Research Laboratory（西穆拉研究实验室）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究构建了奥斯陆峡湾的ADCIRC流体动力学模型，采用新网格提升效率，验证显示其精度与挪威现有预报模型相当且耗时更少，还改进了极端天气下的模拟效果。
AI中文摘要：
本研究为奥斯陆峡湾的流体动力学模拟引入了一种新的非结构化计算网格。该网格利用OceanMesh2D工具，结合全球测深数据和海岸线数据生成，包含70410个节点，海岸线处的分辨率为50米。我们使用该新网格构建了奥斯陆峡湾的ADCIRC模型，针对四个具有不同特征的时间段运行模型，并将结果与当前最先进的模型以及峡湾内的水位计数据进行验证。结果显示，该模型的表现与挪威当前用于预报的模型相近，但所需计算时间大幅减少。我们采用三种不同的潮汐分潮组合来驱动模型，分析了使用更多分潮的成本与收益，发现其能略微提升模拟结果。不过，由于奥斯陆峡湾的域范围较小，潮汐驱动边界条件的精度有限。为进一步协调模拟结果与水位计数据的偏差，尤其是极端天气事件期间的偏差，我们改用全球ADCIRC模型输出的水位数据来驱动该模型，而非潮汐数据。
英文摘要：
This study introduces a new unstructured computational mesh for hydrodynamic simulations of the Oslofjord. The mesh was created with global bathymetry and shoreline data, using OceanMesh2D. It contains 70,410 nodes, with a resolution at the coastline of 50 meters. We use the new mesh to create an advanced circulation model of the fjord. The model is run for four time periods with different characteristics, and validated against the current state of the art and elevation gauges in the fjord. Initial analyses show that the model effectively propagates tides through the narrow channels of the fjord, while requiring minimal computation time. Three different combinations of tidal constituents are used to force the model, and we analyze the cost and benefits of using additional constituents. In order to assess the model in a realistic scenario, the water surface elevation output from a coarse global model is used to force the model an extreme weather event. The results demonstrate the mesh's ability to reproduce high-resolution total water levels in the fjord, with a maximum root mean square error of just over 10 centimeters.
