Three-dimensional variable resolution for multi-scale modeling in Smoothed Particle Hydrodynamics

IF 7.2 2区物理与天体物理 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computer Physics Communications Pub Date : 2025-04-11 DOI:10.1016/j.cpc.2025.109609

Francesco Ricci , Renato Vacondio , José M. Domínguez , Angelantonio Tafuni

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引用次数: 0

Abstract

This study builds on our prior 2D variable-resolution framework for Smoothed Particle Hydrodynamics (SPH) using domain decomposition, extending it to the simulation of three-dimensional flows. We enhance the domain decomposition strategy to enable efficient mass transfer across subdomains with varying resolutions. Key improvements include a refined calculation of Eulerian fluxes at the interfaces between different subdomains, including the free surface, and the use of a first-order consistent approximation of the pressure gradient for a smooth transition of the physical variables across the different resolution zones.

The model is implemented in the SPH solver DualSPHysics and validated through several 3D test cases, including flow past a sphere, water entry of a wedge, and wave-induced motion of a floating box. Simulation results indicate that our 3D multi-resolution model can capture complex fluid-structure interactions effectively, and it can offer significant computational savings over traditional uniform resolution techniques. Our advancements provide a scalable and efficient solution for simulating a wide range of multi-scale engineering applications, especially those involving fluid-structure interaction.

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光滑粒子流体动力学多尺度三维变分辨率建模

本研究建立在我们之前使用域分解的平滑粒子流体力学（SPH）二维变分辨率框架的基础上，并将其扩展到三维流动的模拟。我们增强了域分解策略，以实现不同分辨率子域间的高效质量传递。主要改进包括对不同子域（包括自由表面）之间界面上的欧拉通量进行精细计算，以及使用压力梯度的一阶一致近似值，以实现物理变量在不同分辨率区域之间的平滑过渡。该模型在 SPH 求解器 DualSPHysics 中实现，并通过多个三维测试案例进行了验证，包括流过球体、楔形水入口以及浮箱的波浪诱导运动。仿真结果表明，我们的三维多分辨率模型能有效捕捉复杂的流固相互作用，与传统的统一分辨率技术相比，它能显著节省计算量。我们的进步为模拟各种多尺度工程应用，尤其是涉及流固相互作用的应用提供了可扩展的高效解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computer Physics Communications 物理-计算机：跨学科应用

CiteScore

12.10

自引率

3.20%

发文量

287

审稿时长

5.3 months

期刊介绍： The focus of CPC is on contemporary computational methods and techniques and their implementation, the effectiveness of which will normally be evidenced by the author(s) within the context of a substantive problem in physics. Within this setting CPC publishes two types of paper. Computer Programs in Physics (CPiP) These papers describe significant computer programs to be archived in the CPC Program Library which is held in the Mendeley Data repository. The submitted software must be covered by an approved open source licence. Papers and associated computer programs that address a problem of contemporary interest in physics that cannot be solved by current software are particularly encouraged. Computational Physics Papers (CP) These are research papers in, but are not limited to, the following themes across computational physics and related disciplines. mathematical and numerical methods and algorithms; computational models including those associated with the design, control and analysis of experiments; and algebraic computation. Each will normally include software implementation and performance details. The software implementation should, ideally, be available via GitHub, Zenodo or an institutional repository.In addition, research papers on the impact of advanced computer architecture and special purpose computers on computing in the physical sciences and software topics related to, and of importance in, the physical sciences may be considered.