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首页> 外文会议>MIT Conference on Computational Fluid and Solid Mechanics >Some recent developments for moving-least-squares particle methods
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Some recent developments for moving-least-squares particle methods

机译：最近移动 - 最小二乘粒子方法的一些发展

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Two developments are reported. First, a three-dimensional boundary detection technique for sets of overlapping spheres is described. It finds the exact boundary in the sense that if a physical model of the overlapping spheres is constructed, it would look exactly like the numerical construction. This is of critical importance to moving-least-squares enhancements of smooth-particle hydrodynamics requiring explicit boundary value treatments, but would be of use for any meshfree technique. Secondly, a new numerical integration technique involving only data at the MLS nodes is described. It differs from traditional nodal quadrature technique in that the geometrical volume is replaced by certain sums of the MLS correction factors and weights. Numerical examples demonstrate that the method correctly accounts for the overlap of weight functions, and converges to the correct value.
机译：报告了两个发展。首先，描述了用于重叠球体组的三维边界检测技术。它在意义上发现了确切的边界，如果构造重叠球体的物理模型，它看起来就像数值结构一样。这对移动性粒子动力学的最小平方增强的最重要的重要性至关重要，需要明确的边界值处理，但是对于任何网格免于技术将用于使用。其次，描述了仅涉及MLS节点的数据的新的数值积分技术。它与传统的节点正交技术不同，因为几何体积由MLS校正因子和重量的某些总和代替。数值示例表明该方法正确地占重量函数的重叠，并收敛到正确的值。

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