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首页> 外文期刊>International journal of computational methods >A New Particle Generation Method for Arbitrary 2D Geometries in SPH Modeling
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A New Particle Generation Method for Arbitrary 2D Geometries in SPH Modeling

机译：SPH建模中任意2D几何形状的新粒子生成方法

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摘要

For smoothed particle hydrodynamics (SPH), homogeneous particle distribution is important to ensure the computational accuracy and stability, but it is hard to achieve this for complex geometries. In this paper, a new particle generation method is developed to generate particles for arbitrary 2D geometries. In the method, the geometry required for generating particles is orthogonally partitioned into a series of sub-domains. Among the resultant sub-domains, the most ones having standard area are directly converted into particles. The others are iteratively meshed into elements with nearly standard area and particles are placed according to these elements. The present method is implemented based on Abaqus. Examples of particle generation are given to compare various particle generation methods. It is found that the present method shows advantages over some existing methods in the approximation of geometric boundary as well as the regularity and homogeneity of particle distribution. Several physical problems are adopted to examine the influence of initial particle distribution on SPH solution. The calculated results show that particle distributions generated by the present method can lead to better accuracy and stability than those created by some existing methods.
机译：对于平滑的粒子流体动力学（SPH），均匀颗粒分布对于确保计算精度和稳定性非常重要，但很难实现这一点的复杂几何形状。在本文中，开发了一种新的颗粒生成方法以产生任意2D几何形状的粒子。在该方法中，生成粒子所需的几何形状在一系列子域中进行正交划分。在所得的子域中，具有标准区域的最多转换为颗粒。其他方法迭代地啮合成具有近乎标准区域的元件，并且根据这些元件放置颗粒。本方法基于ABAQU实现。给出颗粒产生的实例以比较各种颗粒生成方法。发现本方法显示了几何边界近似的一些现有方法以及颗粒分布的规律性和均匀性的优点。采用了几种物理问题来检验初始颗粒分布对SPH溶液的影响。计算结果表明，本方法产生的粒子分布可以导致比某些现有方法产生的粒度更好地和稳定性。

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