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arXiv 1908.01762math.NAcs.NAphysics.comp-ph
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一种高效的、开源的迭代ISPH方案

An efficient, open source, iterative ISPH scheme

Abhinav Muta, Prabhu Ramachandran, Pawan Negi

摘要:

本文提出了一种简单、鲁棒和通用的方法来实现不可压缩光滑粒子流体动力学(ISPH)方法。这种方法非常适合在CPU和GPU上实现。该方法是无矩阵的,并使用迭代公式来建立和求解压力-泊松方程。一种新的方法是用来确保均匀的粒子分布和改进的边界条件。该公式使得可以使用弱可压缩SPH格式的固体壁边界条件。该方法速度快,在GPU上运行,而不需要复杂的集成与稀疏线性求解器。我们表明,这种方法是足够准确的,但与其他方法相比,效率。几个基准问题,说明了新方案的鲁棒性,性能和广泛的适用性。提供了一个开放源代码的实现,手稿是完全可复制的。

英文摘要:

In this paper a simple, robust, and general purpose approach to implement the Incompressible Smoothed Particle Hydrodynamics (ISPH) method is proposed. This approach is well suited for implementation on CPUs and GPUs. The method is matrix-free and uses an iterative formulation to setup and solve the pressure-Poisson equation. A novel approach is used to ensure homogeneous particle distributions and improved boundary conditions. This formulation enables the use of solid wall boundary conditions from the weakly-compressible SPH schemes. The method is fast and runs on GPUs without the need for complex integration with sparse linear solvers. We show that this approach is sufficiently accurate and yet efficient compared to other approaches. Several benchmark problems that illustrate the robustness, performance, and wide range of applicability of the new scheme are demonstrated. An open source implementation is provided and the manuscript is fully reproducible.

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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