Use cases

Use Cases – Other Applications

Die Filling

Simulation of the die filling process for cohesive and non-cohesive material. This setup can be used to investigate the material segregation, emerging inhomogeneities in the bulk material or the permissible operation speed.

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Battery Modelling

Calculation of electric conductivity also available in Aspherix®. Potential and electric heating can be calculated for the particles. Conductance and current can be calculated for all particle-particle and particle-wall contacts.

Tutorial case for electric conductivity available!

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Excavation

Size-based Segregation of Pharmaceutical Powders
This is the CFD-DEM simulation of fine, poly-disperse pharamaceutical powder in a closed tube. Size segregation is caused by the counter-current airflow which is induced by the particle stream falling downwards.

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Excavation

Size-based Segregation of Pharmaceutical Powders
This is the CFD-DEM simulation of fine, poly-disperse pharamaceutical powder in a closed tube. Size segregation is caused by the counter-current airflow which is induced by the particle stream falling downwards.

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Excavation

Size-based Segregation of Pharmaceutical Powders
This is the CFD-DEM simulation of fine, poly-disperse pharamaceutical powder in a closed tube. Size segregation is caused by the counter-current airflow which is induced by the particle stream falling downwards.

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Excavation

Size-based Segregation of Pharmaceutical Powders
This is the CFD-DEM simulation of fine, poly-disperse pharamaceutical powder in a closed tube. Size segregation is caused by the counter-current airflow which is induced by the particle stream falling downwards.

Vimeo

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Excavation

Size-based Segregation of Pharmaceutical Powders
This is the CFD-DEM simulation of fine, poly-disperse pharamaceutical powder in a closed tube. Size segregation is caused by the counter-current airflow which is induced by the particle stream falling downwards.

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Planetary Exploration

The mole is about 30 cm in the regolith and probably still 7 cm in the tube of the support structure. It is approximately pointing 15° away from the vertical and has undergone either some rotation or precession of its rotation axis. It is still healthy but, of course, Its life time is limited.

Publication DLR with Goniva & Kloss 2011

planet2
planet

Grosse, Lange,  Burrow, van Zoest,  Goniva, Kloss,  (2011) First Design Concept for a Combined Thermal and Mechanical Penetration Device for Investigations of Icy Planetary Bodies – The ‘Cryo-Mole’. EGU General Assembly 2011, Wien, Österreich.

Wave Attenuation by Vegetation

Modelling of the wave attenuation by flexible vegetation. Due to the flow resistance caused by the vegetation the wave pattern as well as the erosion pattern on the bottom is affected.

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1D-3D Model of Twin Screw Extruder

Process times and system size are often an issue when modelling industrial applications with a high degree of resolution. To overcome these limitations we have developed a mixed 1D-3D model, in this case applied to a twin-screw exruder case. The approach consists of two parts:

  • 3D: DEM simulations of some relevant “chunks” of the extruder are carried out for capturing effects that occur on small scales. These chunks are called “representative volume elements” (RVE) hereafter.
  • 1D: A low-order model is used to reproduce the series of conveying elements connecting the RVEs. The model is obtained from a 3D simulation of RVE 1.

This is a sketch of the scheme:

1D-3D model

3D Printing

In this project we are investigating the effect of powder cohesiveness on the quality of the particle bed.

A rigid recoater moves forward and ocillates to account for external vibrations (e.g., induced by the machine, imagect with the printed objects, …).

With the current cohesion settings, occasional defects occur, caused by particle jamming.

3d printing
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Laser Modelling

Heating of a parabolic mirror due to laser reflection. The laser beam is modelled by distinct photons.

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Meso-scale Catalyst Model

  • CFDEM®coupling can use Immerse Boundary Method (IBM) to calculate the conductive heat flux between a rigid body and the surrounding fluid.
  • The heat transfer is enabled by the force model LaEuScalarTempIB (on the coupling side) and by the Aspherix® command enable_heat_conduction (on the DEM side).
  • Additional feature of LaEuScalarTempIB: prescribe a mass diffusivity inside the immersed bodies to control the transport of chemical species inside/outside the body.
cooling_sphere_IBM

1D-3D Model of Catalytic System

  • Simulation of methane dehydroaromatization using a combined 3D-1D model
  • Activity conducted in the Zeocat 3D project (EU’s Horizon 2020)
  • LaEuScalarTempIB: prescribe a mass diffusivity inside the immersed bodies to control the transport of chemical species inside/outside the body.
Zeocat3D_image

Chromatography Column

The group of Prof. Weuster-Botz at TUM (D. Hekmat, M. Dorn) showed impressive scientific progress on modelling chromatography columns:

“…packing non-uniformity may cause peak asymmetry and limit the performance of packed-bed chromatographic columns.”
“Using coupled CFD-DEM modeling, the measured packing behavior was reproduced qualitatively providing valuable information regarding intrinsic packing properties that up to now have been inaccessible.”

chromatography_column

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