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An erosion model for the discrete element method
Particuology ( IF 3.5 ) Pub Date : 2017-04-24 , DOI: 10.1016/j.partic.2016.12.005
Yongzhi Zhao , Huaqing Ma , Lei Xu , Jinyang Zheng

A shear impact energy model (SIEM) of erosion suitable for both dilute and dense particle flows is proposed based on the shear impact energy of particles in discrete element method (DEM) simulations. A number of DEM simulations are performed to determine the relationship between the shear impact energy predicted by the DEM model and the theoretical erosion energy. Simulation results show that nearly one-quarter of the shear impact energy will be converted to erosion during an impingement. According to the ratio of the shear impact energy to the erosion energy, it is feasible to predict erosion from the shear impact energy, which can be accumulated at each time step for each impingement during the DEM simulation. The total erosion of the target surface can be obtained by summing the volume of material removed from each impingement. The proposed erosion model is validated against experiment and results show that the SIEM combined with DEM accurately predicts abrasive erosions.



中文翻译:

离散元法的侵蚀模型

基于离散元法(DEM)模拟中颗粒的剪切冲击能,提出了一种适用于稀颗粒流和致密颗粒流的侵蚀的剪切冲击能量模型(SIEM)。进行了许多DEM模拟,以确定由DEM模型预测的剪切冲击能与理论侵蚀能之间的关系。仿真结果表明,在冲击过程中,近四分之一的剪切冲击能将转化为侵蚀。根据剪切冲击能量与侵蚀能量的比值,从剪切冲击能量预测侵蚀是可行的,在DEM模拟过程中,可以针对每个冲击在每个时间步长累积侵蚀。目标表面的总腐蚀可通过累加从每个撞击中去除的材料体积来获得。

更新日期:2017-04-24
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