Ugur Tüzün

TL;DR: In this paper, a continuous and gradual Hopper filling method was introduced, a more realistic normal-tangential interaction between the particles, particle size polydispersity, and the model was extended from two to three dimensions (3D).

TL;DR: In this paper, a Cohesive Discrete Element Method (CDEM) was used to investigate the internal tensile stress and the tensile strength and shear strength of fine, cohesive granular materials.

TL;DR: In this article, a continuous potential interaction for frictional granular flows is introduced to ensure the stability of contact mechanical force algorithms over much larger time steps than were hitherto possible, by allowing softer interactions which vary on the same scale as the nominal particle size rather than the micro-contact scale used in the majority of previous literature.

TL;DR: In this paper, the phase transition of the microstructure and its effects on the observed bulk densities, discharge rates, and size segregation were investigated using a mass-flow hopper and a funnel.

TL;DR: In this paper, a non-intrusive local averaging technique was developed to compute bulk stresses from the values of local interparticle contact stresses which allowed us to monitor the changes in the orientation of the major principal normal stress as well as the magnitude of the shear stress in different hopper sections.