Shape representation of axisymmetrical, non-spherical particles in discrete element simulation using multi-element model particles
Shape representation of axisymmetrical, non-spherical particles in discrete element simulation using multi-element model particles
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DOI：
10.1108/02644409910271894
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发表时间：
1999-01-01
影响因子：
1.6
通讯作者：
Raji, AO
中科院分区：
文献类型：
--
作者：
Favier, JF;Abbaspour-Fard, MH;Raji, AO
提出了一种在离散元（DE）模拟中表示非球形、表面光滑、轴对称颗粒的新方法，该方法使用的模型颗粒包括任意大小的重叠球体，球体的中心沿颗粒的对称主轴沿着彼此相对固定。接触检测和力变形和颗粒运动的计算是通过使用标准的DE技术来实现的，该技术被修改为将每个元素球体的行为与其所属的多元素颗粒的行为相结合。该方法使动态行为的颗粒的高纵横比和不规则的曲率（在两个维度上）被建模。使用球体来表示一个颗粒的计算速度和准确性的接触检测球的优势，这应该使该方法可比的计算效率的替代方案表示非球形颗粒。
A new method of representing non-spherical, smooth-surfaced, axi-symmetrical particles in discrete element (DE) simulation using model particles comprising overlapping spheres of arbitrary size whose centres are fixed in position relative to each other along the major axis of symmetry of the particle is presented. Contact detection and calculation of force deformation and particle movement is achieved using standard DE techniques modified to integrate the behaviour of each element sphere with that of the multi-element particle to which it belongs. The method enables the dynamic behaviour of particles of high aspect ratio and irregular curvature (in two dimensions) to be modelled The use of spheres to represent a particle takes advantage of the computational speed and accuracy of contact detection for spheres, which should make the method comparable in computational efficiency to alternative schemes for representing non-spherical particles.