基于二维离散体积法的GPU真实世界海洋学模拟
Real-World Oceanographic Simulations on the GPU using a Two-Dimensional Finite-Volume Scheme
摘要：
在这项工作中，我们采取了现代高分辨率有限体积方案来求解旋转浅水方程，并将其扩展为运行现实世界的海洋模拟所需的功能。我们的贡献包括一个空间变化的北向量和科里奥利长期所需的大规模域，移动干湿锋，静态的土地掩模，底部剪切应力，风力，边界条件嵌套在一个全球性的模型，和一个有效的模型重新制定，使其非常适合大规模并行实现。我们的模型顺序进行了验证，使用网格收敛测试，我们显示数值实验，使用三个不同的部分沿挪威海岸的基础上，来自挪威气象研究所运行的业务预报的数据。我们的模拟框架在现代P100 GPU上显示出完美的弱缩放，并且能够以一小部分成本提供非常接近操作模型的潮汐波预测。本作品中使用的所有源代码和数据都在开放许可证下公开提供。
英文摘要：
In this work, we take a modern high-resolution finite-volume scheme for solving the rotational shallow-water equations and extend it with features required to run real-world ocean simulations. Our contributions include a spatially varying north vector and Coriolis term required for large scale domains, moving wet-dry fronts, a static land mask, bottom shear stress, wind forcing, boundary conditions for nesting in a global model, and an efficient model reformulation that makes it well-suited for massively parallel implementations. Our model order is verified using a grid convergence test, and we show numerical experiments using three different sections along the coast of Norway based on data originating from operational forecasts run at the Norwegian Meteorological Institute. Our simulation framework shows perfect weak scaling on a modern P100 GPU, and is capable of providing tidal wave forecasts that are very close to the operational model at a fraction of the cost. All source code and data used in this work are publicly available under open licenses.
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