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Vous êtes ici:  SAVOIR-FAIRE  ›  SemProg  ›  ROCKY DEM

Particle simulation using the Discrete-Element-Method in Rocky (cours en anglais)

Le 4 décembre 2019 - 2 jours - à Renens

ROCKY DEM provides accurate predictions of particle behavior in granular and liquid systems by analyzing media flows, energy absorption rates and particle breakage. Wherever large quantities of particles and bodies, regardless of their size, shape, material and adhesion force, are set in motion in bulk, mixing, slipping or flow processes, ROCKY can help to understand and improve the processes.
On the one hand, these are measures to optimise the movement of the mass, for example to minimise material losses or to prevent or suppress dust formation. On the other hand, the results provide important information for the efficient design of peripheral products, for example to increase the service life of conveyor belts and other components.
ROCKY DEM is used to optimize agitator mills, SAG mills, crushers and high-pressure grinding rolls, among other things; the particle spectrum ranges from small synthetic parts such as tablets to rubble.

This seminar is aimed at all process and calculation engineers whose mission is to design machines and flows in which particles play an important role.

You will learn the basics of the Discrete Elements Method in order to be able to evaluate your ROCKY simulation results in a qualified manner. For fast and efficient handling, you will receive an introduction to the operating concept including helpful tips from practice. This also includes the question of the procurement of material properties, the required physical tests and the methodology of comparing simulation and test. Backgrounds and exercises on advanced tasks such as the definition of fracture models and particle shapes enable you to acquire meaningful and high-performance solutions. Notes on solution setup such as the use of GPUs ensure that you achieve optimal computing performance.


Simulation with the Discrete Element Method (DEM)

  • Motivation and definitions
  • Discrete element method
  • Operating concept of the software ROCKY
  • Exercise: Bulk material in a transfer chute

Material data calibration from test results

  • Calibration of parameters in ROCKY, e.g. contact parameters
  • Exercise: angle of repose (AoR) and internal flow channel angle (drawdown angle)

Consideration of real particle shapes

  • Predefined particle shapes from the ROCKY library
  • Real particle shapes via geometry interface (STL)
  • Evaluation of the residence time in the coating drum
  • Exercise: Tablet Coating - Process Simulation

Simulation of brittle fracture of particles

  • Instant fragmentation model
  • Drop test to determine the break parameters, e.g. critical impact energy
  • Exercise: Simulation of the drop test

Wear due to particle transport

  • Component wear by means of wear model according to Archard
  • Exercise: Ball mill

Mechanical component stress due to particle transport

  • Transfer of particle forces from ROCKY to ANSYS Mechanical
  • Deformations and stress evaluation in the component
  • Exercise: Transfer chute extended with mechanical properties

Flow induced particle separation processes

  • One-way coupling CFD-DEM (ANSYS Fluent-ROCKY Interface)
  • Exercise: Waste separation

Outlook for further analyses

  • Two-way coupling CFD-DEM (Fluent-ROCKY Interface)
  • Thermal DEM Model for heat exchange between particle to component resp. particle to fluid
  • Parameter studies with ROCKY and optiSLang





Aucun / None

Informations pratiques

CHF 1'630.00 HT (repas du midi et documentation inclus)

4 et 5 décembre 2019

09h00 à 17h00

Avenue de la Poste 3, 1020 Renens

Votre entrée dans la simulation

Votre entrée dans la simulation

  • Introduire la simulation sans risque
  • 4 étapes pour un projet réussi
  • Accompagnement durant tout le processus
Séances d’information

Séances d’information

  • S’informer de manière rapide et gratuite
  • Nombreux sujets sur la simulation
  • Séances et conférences web