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arXiv 1706.04551math.NAcs.NA
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非静力学压力浅层流:基于有限体积和有限差分方案的GPU实现

Non-Hydrostatic Pressure Shallow Flows: GPU Implementation Using Finite Volume and Finite Difference Scheme

C. Escalante, T. Morales de Luna, M. J. Castro

AI总结:

本文提出一种高效的混合有限体积有限差分方案,用于求解非静力学浅层流系统,适用于GPU架构,通过多项式粘性矩阵路径保守有限体积方法和紧凑有限差分方法实现高阶精度,验证了方法的效率和准确性。

摘要:

我们考虑了Yamazaki等人推导的积分非静力学系统。提出了一种高效的正式二阶well-balanced混合有限体积有限差分数值方案。该方案基于一种最初由Chorin-Temam [15]引入的投影校正型方案,分为两个步骤:首先,使用多项式粘性矩阵路径保守有限体积方法对系统的超几何部分进行离散化;其次,通过紧凑有限差分方法求解色散项。还提出了一种处理复杂底拓扑上波破碎的新方法。该方法适应于GPU架构,并介绍了其GPU实现的指导方针。该方法已应用于理想化和具有挑战性的实验测试案例,展示了该方法的效率和准确性。

英文摘要:

We consider the depth-integrated non-hydrostatic system derived by Yamazaki et al. An efficient formally second-order well-balanced hybrid finite volume finite difference numerical scheme is proposed. The scheme consists of a two-step algorithm based on a projection-correction type scheme initially introduced by Chorin-Temam [15]. First, the hyperbolic part of the system is discretized using a Polynomial Viscosity Matrix path-conservative finite volume method. Second, the dispersive terms are solved by means of compact finite differences. A new methodology is also presented to handle wave breaking over complex bathymetries. This adapts well to GPU-architectures and guidelines about its GPU implementation are introduced. The method has been applied to idealized and challenging experimental test cases, which shows the efficiency and accuracy of the method.

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。

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