dense medium cyclone is a high capacity device that is widely used in coal preparation. it is simple in design but the swirling turbulent flow, the presence of medium and coal with different density and size fraction and the presence of the air-core make the flow pattern in dmcs complex. in this article the flow pattern simulation of dmc is performed with computational fluid dynamics and fluent...

Die Modellbildung und Simulation ist ein Applikationsgebiet, an dem viele allgemeingültige Verfahren und Methoden der Informatik vermittelt werden können. Damit ist sie ein Teilgebiet der Informatik, das in den Informatikunterricht der allgemeinbildenden Schulen integriert werden sollte. Für die Implementierung von Simulationsmodellen auf Computern werden geeignete Softwarewerkzeuge benötigt. D...

Simulation of a large number of deformable bodies is often difficult because complex high-level modeling is required to address both multi-body contact and viscoelastic deformation. This necessitates the combined use of a discrete element method (DEM) and a finite element method (FEM). In this study, a quadruple discrete element method (QDEM) was developed for dynamic analysis of viscoelastic m...

Discrete Element Method (DEM) is a powerful tool for simulating different types of mills. It also used computing particles such as rocks, grains, and molecules. DEM has been widely in the field rock mechanics. In present work, DEM approach applied to model milling media (powder balls) inside planetary ball mill estimate distribution dry powder during milling. fact, efficiency DEM strongly depen...

The prediction quality of discrete element method (DEM) models for railway ballast can be expected to depend on three points: the geometry representation of the single particles, the used contact models and the parametrisation using principal experiments. This works aims at a balanced approach, where none of the points is addressed with excessive depth. In a first step, a simple geometry repres...

The simulation of protein folding kinetics is a challenging task and modern computers are just reaching the performance levels required to push multiple folding trajectories into the microsecond range. Even with enough computing power at hand, the verification of the simulated protein kinetics usually relies on static parameters like average folding rates from folding experiments[34]. In recent...

An important aspect of hydraulic flood modelling deals with representing topography of river and floodplain. Commonly, flood model applications are reported successful in topographically simple areas were topography only changes gradually and where topography is simulated by DEM’s of relatively low resolution. Such DEM’s are particular useful for flood simulation in rural areas, although import...

This study is an engineering application of optimum design approach using the discrete element method (DEM) and a genetic algorithm (GA) which one most commonly used evolutionary computation algorithms. The three-dimensional shapes waste electrical electronic equipment (WEEE) were directly applied in DEM simulation. DEM-GA simulation was to tray set on single-item feeder for recycling WEEEs; as...

Pebble flow simulation plays an important role in the steady state and transient analysis of thermal-hydraulics and neutronics for Pebble Bed Reactors (PBR). The Discrete Element Method (DEM) and the modified Molecular Dynamics (MD) method are widely used to simulate the pebble motion to obtain the distribution of pebble concentration, velocity, and maximum contact stress. Although DEM and MD p...

Mesh convergence is a vital issue that needs to be addressed in numerical model. This study investigated the effects of mesh element number on Discrete Element Method (DEM) granite rock response under compression loading. used 3D finite-element code LS-DYNA model Unconfined Compression Test (UCT) simulation. Models with five different types were conducted for mesh, namely normal fine super coar...