GENERALIZED MOBABLE BED SIMULATOR BY USING 3D DISTINCT ELEMENT METHOD
GENERALIZED MOBABLE BED SIMULATOR BY USING 3D DISTINCT ELEMENT METHOD
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采用3D离散元法的广义移动床模拟器
DOI：
10.2208/prohe.46.613
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发表时间：
2002
影响因子：
8
通讯作者：
T. Sakai
中科院分区：
文献类型：
--
作者：
H. Gotoh;E. Harada;T. Sakai
垂直式二维动床模拟器是泥沙运动计算力学的重要工具，但在描述泥沙运动现象的某些细节方面存在局限性。由于所有泥沙颗粒的重心都在同一垂直平面上，二维模型不能描述存在于计算垂直平面外部空间中的颗粒的影响。2D模型的这种局限性带来了一些问题，这些问题来自于颗粒的几何排列，特别是在颗粒分选的模拟上。给出了基于离散单元法的三维动床模拟器的总体结构。通过模拟均匀坡面上固定垂直柱作用下的泥沙堆积过程，验证了该模型的部分性能。
The vertical 2D movable bed simulator, which has been a key tool of the computational mechanics of sediment transport, has a limitation in describing some of details of sediment transport phenomena. Because all of sediment particles have their center of gravity on the same vertical plane, the 2D model cannot describe the effect of the particles existing in an external space of the calculated vertical plane. This limitation of 2D model brings some problems, which comes from a geometrical arrangement of particles, especially on the simulation of grain sorting. The framework of 3D movable bed simulator, which is based on the distinct element method, is shown herein. A dam-up process of sediment body moving on a uniform slope by fixed vertical columns is simulated to show some part of performance of the present model.