5 papers
Tree codes and sort-and-sweep algorithms for neighborhood computation: A cache-conscious comparison
Dominik Krengel, Yuki Watanabe, Ko Kandori +2
Neighborhood algorithms may take a considerable percentage of computer time in discrete element methods (DEM). While the sort-and-sweep algorithm is ideal in some ways, as it only…
Vertical pullout of a non-spherical intruder from a granular medium: From system-wide response to avalanching around the intruder
Dominik Krengel, Jian Chen, Shun Nomura +2
Intruder mechanics in a granular aggregate is a common subject in engineering and geotechnical applications. However, most studies are limited to spherical intruders or small displ…
Effects of particle angularity on granular self-organization
Dominik Krengel, Haoran Jiang, Takashi Matsushima +1
Recent studies of two-dimensional poly-disperse disc systems revealed a coordinated self-organisation of cell stresses and shapes, with certain distributions collapsing onto a mast…
Implementing van der Waals forces for polytope particles in DEM simulations of clay
Dominik Krengel, Jian Chen, Zhipeng Yu +2
Clay minerals are non-spherical nano-scale particles that usually form flocculated, house-of-card like structures under the influence of inter-molecular forces. Numerical modeling…
Tree Code Based Neighborhood Algorithms for Discrete Element Methods
Yuki Watanabe, Dominik Krengel, Hans-Georg Matuttis
We report our experiences for the development of a neighborhood algorithm implemented via tree-codes to optimize the performance of a discrete element method (DEM) for convex polyt…