Simulating dense granular flow using the ?( <i>I</i> )?rheology within a space?time framework

A space-time framework is applied to simulate dense granular flow. Two different numerical experiments are performed: a column collapse and dam break on an inclined plane. The modeled as two-phase flows. material represented by constitutive model, the $\mu$($I$)-rheology, that based Coulomb's friction law, such normal stress pressure related tangential stress. model represents complex shear thinning viscoplastic behavior. interface between surrounding light fluid captured with level set function. Due discontinuities close interface, mesh requires sufficient resolution. approach allows unstructured meshes in time and, therefore well refined temporal direction around interface. In this study, results performance of flat simplex space discretization verified analyzed.