Round robin test on angle of repose: DEM simulation results collected from 16 groups around the world
Round robin test on angle of repose: DEM simulation results collected from 16 groups around the world
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DOI：
10.1016/j.sandf.2023.101272
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发表时间：
2023-02
影响因子：
3.7
通讯作者：
H. Saomoto;N. Kikkawa;Shuji Moriguchi;Y. Nakata;M. Otsubo;Vasileios Angelidakis;Y. Cheng;K. Chew-K.
中科院分区：
文献类型：
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作者：
H. Saomoto;N. Kikkawa;Shuji Moriguchi;Y. Nakata;M. Otsubo;Vasileios Angelidakis;Y. Cheng;K. Chew-K.
循环试验（对同一问题的同时分析）是一种研究不同分析师对给定问题提供的结果的方差和灵敏度以及参与测试的每个组使用的特定软件的可靠性的方法。对传统的数值方法进行了循环测试（例如，有限差分法），但还没有离散单元法（DEM）。本文介绍了第一次循环试验的结果DEM模拟安息角，涉及16组来自世界各地使用不同的软件。在这个循环测试的范围内，大多数组报告了类似的静止角度的模拟结果，这些结果与实验值的平均值仅相差几度，这一点最初对参与者隐瞒了。在休止角的变化程度上也有很好的一致性。此外，本文还结合与会者的报告，揭示了颗粒间本构模型和DEM软件的最新发展趋势。
The round robin test (the simultaneous analysis of the same problem) is a method to investigate the variance and sensitivity of results provided by different analysts for a given problem and the reliability of the particular software used by each group participating in the test. A round robin test has been conducted for the traditional numerical method (e.g., finite difference method), but not yet for the discrete element method (DEM). This paper presents the results of the first ever round robin test on the DEM simulation for the angle of repose, involving 16 groups from around the world using different softwares. Within the scope of this round robin test, most groups reported similar simulation results for the angle of repose that differed only by a few degrees from the average of the experimental values, which was initially concealed from participants. There was also good agreement on the degree of variance of the angle of repose. In addition, this paper revealed the recent trends on the interparticle constitutive models and DEM softwares by considering the reports obtained from the participants.