arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2111.09705physics.flu-dyncs.LG
收藏

基于物理信息的神经网络自由表面流的学习

Learning Free-Surface Flow with Physics-Informed Neural Networks

University of Stuttgart(斯图加特大学)

Raphael Leiteritz, Marcel Hurler, Dirk Pflüger

摘要:

数据驱动的学习方法和经典模拟之间的接口构成了一个有趣的领域,提供了许多新的应用。在这项工作中,我们建立在物理信息神经网络(PINN)的概念,并将其应用于浅水方程(SWE)模型。这些模型在建模和模拟自由表面流动场景中发挥着重要作用,例如洪水波传播或海啸波。PINN残差的不同配方进行了比较,并进行了多个优化评估,以加快收敛速度。我们测试这些与不同的1-D和2-D的实验,并最终证明,对于SWE的情况下,不同的水深,该方法是能够产生竞争力的结果相比,直接数值模拟与总的相对$L_2$误差$8.9e-3$。

英文摘要:

The interface between data-driven learning methods and classical simulation poses an interesting field offering a multitude of new applications. In this work, we build on the notion of physics-informed neural networks (PINNs) and employ them in the area of shallow-water equation (SWE) models. These models play an important role in modeling and simulating free-surface flow scenarios such as in flood-wave propagation or tsunami waves. Different formulations of the PINN residual are compared to each other and multiple optimizations are being evaluated to speed up the convergence rate. We test these with different 1-D and 2-D experiments and finally demonstrate that regarding a SWE scenario with varying bathymetry, the method is able to produce competitive results in comparison to the direct numerical simulation with a total relative $L_2$ error of $8.9e-3$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑