We use cookies. By browsing our site you agree to our use of cookies. Accept this cookie | Find out more & disable cookies

EDEM Video Gallery

Below are some examples of applications of EDEM® simulation. For more information contact us.


Mining: Transfer Chutes simulated using EDEM BulkSim®

 

Design of a 90-degree copper ore transfer chute (Courtesy of BMEA)

EDEM BulkSim is used for the design evolution of a problematic copper ore transfer point. By adjusting the layout of the chute regions of high impact and wear are reduced.

 

Design of a Stacker Transfer Point (Courtesy of BMEA)

EDEM BulkSim is used in the design of a stacker transfer point handling iron ore at 11,000 tonnes / hour.

 

Soft-loading Transfer Chute Simulation (Courtesy of BMEA)

EDEM BulkSim allows engineers to design soft loading chutes that offer a low angle of discharge and low impact force on belt. This can lead to reduced air entrainment and dust generation, as well as reduced material degradation.

 

Ore transfer tower; large drop height (Courtesy of BMEA)

Four rock boxes control material flow, provide wear protection, and enable change in conveyor direction.

 

90° rock-box carrying a cohesive ore

Calibrated EDEM Material Model used to verify the flow of a cohesive ore through a 90° rock-box chute.

 

Ore chute with three flow paths at 585tph (Courtesy of DRA Minerals)

 

Micro-ledged chute carrying copper ore (Courtesy of BMEA)

Copper ore is being fed into the complex chute design at 1,700 tonnes/hr. Over a period of 2 minutes of operation the ore continually builds up within the ledges until a complete blockage results. Prediction of such long term blockage within complex equipment is not possible with traditional design methods.

 

Conveyor Transfer Chute - EDEM in Action

Mineral Processing: Milling & Grinding

 

Particle breakage in cone crusher using particle replacement method

Larger rocks are progressively broken into smaller particles that discharge from the side of the crusher. The number of particles in the simulation increases as large particles are replaced by multiple smaller particles, according to breakage functions.

 

Particle breakage in grinding mill using particle replacement method

As breakage occurs in the mill, large rocks are replaced with smaller rocks, maintaining overall mass balance.

 

Rock breakage in crusher (Courtesy of Chalmers University of Technology)

EDEM is used to test virtual prototypes of new crusher concepts. In this simulation the breakage of rocks is modelled using the bonded particle model approach. Particles are visualized by showing the bonds which provides a deeper insight into the breakage process. 1st place winner of 2014 EDEM Visualization Contest

 

High Pressure Grinding Rolls (HPGR) - (Courtesy of LTM-UFRJ)

Particle breakage in HPGR using the particle replacement method. This model has been used to predict the effect of material properties on the operating gap and the load distribution on the surface of the rolls, demonstrating that it can effectively be used to predict the performance of the HPGR. 3rd place winner of the 2014 EDEM Visualization Contest.

 

Particle breakage in HPGR mill using particle replacement method

As breakage occurs in the mill, large rocks are replaced with smaller rocks, maintaining overall mass balance.

 

Gap width between HPGR rollers varies (Courtesy of LTM-UFRJ, in partnership with DEM Solutions)

High pressure grinding Roller (HPGR) is modeled as a dynamically controlled body, responding to the balance of forces applied from material bed and mounting spring assembly. Particles experiencing a high compressive force are shown in green.

Heavy Equipment: Excavator Buckets, Truck Bodies

 

Excavator bucket 'programmed' to repeatedly load truck

The Multibody Dynamics Coupling Interface reduces setup and simulation time by programmatically controlling the multiple bucket movements and re-positioning to the start each time. An EDEM Custom Factory instantly creates a bed of particles inside the bucket.

 

Excavator Bucket modeled using EDEM-EASY5-ADAMS Coupled Solution

EDEM simulates the bulk material dynamics. The forces and torques acting on the bucket are returned from EDEM to ADAMS, which then can compute the mechanical response of the arm and boom to allow optimum design of the hydraulic system and engine of the excavator.

 

Dragline bucket modeled using ESTEQ EDEM-Easy5-Adams Coupling

Dragline bucket design with a full set of rigging is modeled by coupling 105 individual components between MSC.Adams and EDEM. This gives valuable insight regarding hoist & drag forces, optimal carry angle and design for soil flow improvement.

 

Dragline bucket comparison (Courtesy of VR Steel)

EDEM is coupled with MSC Adams to compare two taper bucket designs. This coupled simulation enables VR Steel to compare the mass inside the bucket vs. time and the force required to drag the bucket. Normalizing this data, VR Steel can optimize a bucket to provide the best filling characteristics whilst minimizing drag force. (Video compiled using Ensight)

 

EDEM-MBD co-simulation of tractor pulling plow

The EDEM Coupling Interface simplifies model setup and enables EDM-MBD co-simulation. A tractor and plow are modeled as separate bodies to show the interaction of the plow and soil, and wheels and soil–to understand the effects on the motion of the tractor

 

Stress on truck body during loading and discharge – #1

Distribution of surface pressure on a truck body during loading & discharge interpolated between equipment mesh elements

 

Stress on truck body during loading and discharge – #2

Distribution of surface pressure on a truck body during loading & discharge interpolated between equipment mesh elements

 

Stress on truck body during loading and discharge – #3

Distribution of surface pressure on a truck body during loading & discharge interpolated between equipment mesh elements

 

Bucket loader

 

Dump trucks unloading material

Two dump trucks with different levels of fill are being unloaded. The effect of the different levels of stress experienced at the bottom of the truck (because of higher weight of material) is simulated. This leads to more adhesion to the truck body in the fuller truck.

 

Soil-tyre interaction: tractor

EDEM gives insights into regions where the material is likely to stick and provides realistic traction forces and pressure distribution.

Agriculture: Grading, Sieving, Grain handling

 

Infested grain commingling in boot of silo (Courtesy of Kansas State University)

 

Flow of soybeans in conventional mixed flow dryer (Courtesy of Kansas State University)

This simulation aims to determine the particle flow pattern as the grain particles descend from the hopper at the top of the mixed flow dryer to the vertical drying layers.

 

Size sorting of cauliflower

 

Raspberry grading

Simulation of equipment used for the grading (by size) of raspberries.

 

Flexible stalk sieve

Sieving of particles and flexible fibers modeled using bonded particle capability. The fibers are constructed from linear arrays of spheres bonded at their contacts with the bonding model chosen to allow flex at the contacts.

 

EDEM-MBD co-simulation of tractor pulling plow

The MBD CI simplifies model setup and enables MBD-DEM co-simulation. A tractor and plow are modeled as separate bodies to show the interaction of the plow and soil, and wheels and soil–to understand the effects on the motion of the tractor

Process Industries: Mixing, Coating, Drying

 

Tablet attrition during spray coating

 

Tablet movement in a pan coater (Courtesy of RCPE)

Movement and mixing of tablets during pharmaceutical coating process

 

Pharmaceutical tablet coating: Predicting film coating uniformity

 

Tracking residence time of tablets in spray zone in drum coater

The spray is being directed radially from the center of the drum on to the tablet bulk. The tablets are colored by time in the spray zone.

 

Tracking the mass of coating fluid applied to particles in a drum coater

 

Tracking tablets receiving coating fluid in a drum coater

 

Dry mixing using V-Mixer

 

Cohesive material in wet mixing process (Courtesy of IAB Weimar)

 

Mixing of Aggregates (Courtesy of IAB Weimar)

EDEM is used to investigate the mixing process of 2 different-sized aggregate fractions in a UEZ mixer.
Particles in EDEM can be colored by size for analysis of mixing and segregation problems or by velocity to spot areas of low material flow velocity, a potential for causing blockages in equipment.

 

Mixing asphalt for temperature control - Roadtec Shuttle Buggy (Courtesy of Astec Industries)

 

Drum drying of aggregate (Courtesy of Astec Industries)

Drum dryer, showing air temperature vs. aggregate moisture (Courtesy of Astec Industries)

 

Coating of aggregate with bitumen droplets (Courtesy of Astec Industries)

 

Aggregate drum dryer, showing temperature (Courtesy of ASTEC Industries)

 

Optimizing aggregate dryer efficiency #1 (Courtesy of Astec, Inc.)

This EDEM simulation shows the convective heat flux on particles inside an aggregate dryer. The parallel EDEM CFD Coupling for ANSYS Fluent was used to capture the convective heat transfer along with a custom contact model to account for particle moisture. This coupled simulation technique allows Astec to optimize the dryer design for maximum efficiency.

 

Optimizing aggregate dryer efficiency #2 (Courtesy of Astec, Inc.)

This simulation use the Parallel EDEM CFD Coupling for ANSYS Fluent. Particles are coloured by moisture mass fraction. A custom contact model considers the energy lost from evaporation as a heat sink term in the heat calculations.

 

Pickup of spray by a capsule represented as a change in mass

The capsule accumulates mass from contact with spray droplets represented as particles. The spray particles disappear on contact with the capsule.

Other examples

 

Optimizing charge layering in a blast furnace

 

Size segregation in asphalt production & handling

 

Gold gravity recovery- Knelson Concentrator (Courtesy of McGill University)

The Knelson concentrator is a gravity concentration apparatus mainly used in gold mining industries. The fast rotating bowl applies aplies >100g force to the particles inside. Difference in specific gravity in presence of fluidizing water being injected from small tubes on the sides separates gold particles from impurities.

 

Strand flow in Rotary Drum Blender (Courtesy of University of British Columbia)

EDEM is used to model a lab-scale glass-fronted RDB and compare model predictions with real time observation of mill-run strands tumbling inside the lab blender. Getting an accurate model of strand flow is key to enable blending parameters to be adjusted in order to minimize the effects of surging.

Advanced Modeling Solutions using EDEM Application Programming Interface (API)

 

Flexible membrane wrapping around a fixed object.

The membrane constructed of a planar array of spherical particles bonded using flexible bonds. The elements respond to loading from the CAD geometry causing slippage of bonds simulating a highly deformable cloth-like material.

 

Flexible membrane responding to fluid drag and obstruction.

The membrane is constructed of a planar array of spherical particles bonded using flexible bonds. Bonded assemblies of sub-particles can be any shape. Here the element particles are responding to fluid drag calculated from a fluid flow field imported using the Field Data Coupling.

 

Flexible fibers in a drum

Flexible fibers constructed of a bonded linear array of particles. A CAD template (a cylinder) was used instead of each particle in the visualization.

 

Flexible fibers constructed from an array of particles

Flexible fibers constructed from an array of particles created along the line of a helix

 

Modeling flexible fibers using bonded particle capability

Sieving of particles and flexible fibers. The fibers are constructed from linear arrays of spheres bonded at their contacts with the bonding model chosen to allow flex at the contacts.

 

Compression of a brittle solid

Uniaxial compression of a brittle solid represented as a bonded assembly of particles.

 

Bending and plastic deformation of a deformable solid

The solid is represented using a bonded assembly of spheres. The bond strengths can be calibrated using such bending tests.

 

Tool cutting into a bonded assembly

This type of bonded assembly is used to represent coal, rock, concrete etc.

 

Bulk plastic deformation using a Hysteretic Spring model

 

Use of a dynamically changing inter-particle cohesion

Increase in particle clumping as the level of particle cohesion as particles are mixed in a rotating drum.

 

Tracking particles in a salt spreader and dynamically calculating mass transported

The dynamics of salt particles transported across the spreader disk are analyzed by calculating cumulative amount of particles exiting specific zones around the spreader.

 

Visualization of particle residence time using a custom particle property

The holdup of bulk material in a rock box is modeled using a custom property – residence time.

 

Simulation of toner transport in a laser printer

EDEM can be used to study the transport of toner to optimize the systems to improve print quality and speed. This simulation is using the electrostatics module to attract the particles to the transfer drum.

Dynamic Response of Equipment: EDEM - Multibody Dynamics (MBD) Coupling

 

Screw auger transporting particles

 

Hopper with flop gate opens in response to flow of particles

With the EDEM Coupling Interface this model can be made more complex, such as adding damping due to friction in the door, or a more sophisticated method for flow control, such as an actuator.

 

‘Spring box’ lowers as it fills with particles, vector shows movement

A Simple validation test case which loads a specified weight of particles into a spring mounted box to confirm total displacement, according to Hooke’s Law. (System is damped to reduce oscillations).

 

Particles impact a 'free body’ with 6 degrees of freedom

In this example particles impact a box, which is free to rotate and translate in all 6 degrees of freedom, according to the force and torque acting on it. The particles and box are coloured by linear velocity, but on different scales.

 

Impeller jams in attrition mill (Courtesy of New Jersey Institute of Technology)

Using the EDEM Coupling Interface the model incorporates the effect of instantaneous retardation of impeller motion due to jamming of the grinding balls, which increases the accuracy of the predicted energy dissipation rates and assessed performance.

 

Gap width between HPGR rollers varies (Courtesy of LTM-UFRJ, in partnership with DEM Solutions)

High pressure grinding Roller (HPGR) is modeled as a dynamically controlled body, responding to the balance of forces applied from material bed and mounting spring assembly. Particles experiencing a high compressive force are shown in green.

 

Excavator bucket 'programmed' to repeatedly load truck

The Multibody Dynamics Coupling Interface reduces setup and simulation time by programmatically controlling the multiple bucket movements and re-positioning to the start each time. An EDEM Custom Factory instantly creates a bed of particles inside the bucket.

 

Dragline bucket modeled using ESTEQ EDEM-Easy5-Adams Coupling

Dragline bucket design with a full set of rigging is modeled by coupling 105 individual components between MSC.Adams and EDEM. This gives valuable insight regarding hoist & drag forces, optimal carry angle and design for soil flow improvement.

Field Data Import

 

Dust removal from solar panels modeled using particle-EMAG interaction – #1

The Field Data Coupling was used to import an electric field and calculate body forces acting on charged particles in the oscillating field. Used in devising methods for clearing dust from solar panels intended to operate in extraterrestrial environments. (Courtesy of McGill University)

 

Dust removal from solar panels modeled using particle-EMAG interaction – #2

The Field Data Coupling was used to import an electric field and calculate body forces acting on charged particles in the oscillating field. Used in devising methods for clearing dust from solar panels intended to operate in extraterrestrial environments. (Courtesy of McGill University)

 

Clearing solar panels of dust (Courtesy of McGill University)

 

Flexible membrane responding to fluid drag and obstruction.

The membrane is constructed of a planar array of spherical particles bonded using flexible bonds. Bonded assemblies of sub-particles can be any shape. Here the element particles are responding to fluid drag calculated from a fluid flow field imported using the Field Data Coupling.

 

Particles in a hydrocyclone

The particle are acted on by fluid drag forces calculated from a flow field simulated in a 3rd party CFD solver. The converged flow field was imported using the Field Data Coupling which interpolates the fluid velocity vectors in each fluid cell to the individual particles.

 

Coupled simulation with CFD of separation using cross-flow air stream

Fine particles are separated from the heavier particles due to lower drag forces. The drag forces were calculated using the velocity vectors in an imported CFD flow field.

©2014 DEM Solutions Ltd. All rights reserved. Sitemap | Terms of Use