Granular flow problems characterized by large deformations are widespread in various applications, including coastal and geotechnical engineering. The paper deals with the application of a rigid-perfectly plastic two-phase model extended by the Drucker-Prager yield criterion to simulate granular media with a finite volume flow solver (FV). The model refers to the combination of a Bingham fluid and an Eulerian strain measure to assess the failure region of granular dam slides. A monolithic volume-of-fluid (VoF) method is used to distinguish between the air and granular phases, both governed by the incompressible Navier-Stokes equations. The numerical framework enables modeling of large displacements and arbitrary shapes for large-scale applications. The displayed validation and verification focuses on the rigid-perfectly plastic material model for non-cohesive and cohesive materials with varying angles of repose. Results indicate a good agreement of the predicted soil surface and strain results with experimental and numerical data.

翻译：以大变形的颗粒流问题为例，这类问题在海岸工程和岩土工程等众多领域广泛存在。本文探讨了一种基于刚塑性两相模型并引入德鲁克-普拉格屈服准则的有限体积流求解器在颗粒介质模拟中的应用。该模型结合了宾汉流体和欧拉应变度量来评估颗粒坝滑坡的破坏区域。采用整体式流体体积方法区分空气相和颗粒相，两者均受不可压缩纳维-斯托克斯方程支配。该数值框架能够模拟大规模应用中的大位移和任意形状。所展示的验证与确认侧重于针对具有不同休止角的非黏性和黏性材料的刚塑性材料模型。结果表明，预测的土壤表面和应变结果与实验及数值数据吻合良好。