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arXiv 2402.06231physics.flu-dynphysics.comp-ph
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可压缩光滑粒子流体动力学的鲁棒固体边界处理

Robust Solid Boundary Treatment for Compressible Smoothed Particle Hydrodynamics

Navaneet Villodi, Prabhu Ramachandran

AI总结:

针对可压缩SPH边界处理方法缺失的问题,提出鲁棒且广泛适用的边界处理方法及防粒子穿透技术,经多种测试验证优于现有方法,推动SPH成为可压缩流动模拟的可行替代方案。

摘要:

缺乏适用于可压缩光滑粒子流体动力学(SPH)的准确边界处理方法,严重限制了其模拟物体内部及周围流动的能力。为此,本文仔细考虑了SPH可压缩流动特有的挑战。基于此,提出了适用于可压缩SPH的鲁棒且广泛适用的边界处理方法,并伴随一种防止粒子穿透边界的新技术。结果表明,所提方法显著优于其他近期方法。本文采用了多种测试问题来凸显所提方法的优缺点,其中许多问题迄今尚未用SPH进行过模拟。为了可复现性,实现代码已开源,且结果已自动化。总体而言,本研究推动了SPH作为基于网格方法在可压缩流动模拟中可行替代方案的发展。

英文摘要:

The unavailability of accurate boundary treatment methods for compressible Smoothed Particle Hydrodynamics (SPH) severely limits its ability to simulate flows in and around bodies. To this end, challenges specific to compressible flows with SPH are carefully considered. Based on these, robust and widely applicable boundary treatment methods for compressible SPH are proposed. These are accompanied by a novel technique to prevent particle penetration at boundaries. The proposed methods are shown to be significantly better than other recent approaches. A wide variety of test problems, many of which are not shown to be simulated with SPH thus far, are employed to highlight the strengths and weaknesses of the proposed methods. The implementation is open source and the results are automated in the interest of reproducibility. Overall, this research contributes to the advancement of SPH as a viable alternative to mesh-based methods for compressible flow simulations.

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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