Discrete Element Method

VKB Tech is one of the few companies which offers simulation services of bulk material behaviour during transportation, mixing, milling and crushing by Discrete Element Method DEM.

DEM SIMULATION WILL ALLOW YOU TO:

 Predict and improve performance of machines and devices

 Choose optimal parameters and configuration of tools

 Reduce energy consumption

 Determine the real loads for design process

 Avoid demurrage and breakdown

 Increase service life of machines

 Reduce the repair and service costs

 Reduce dust emissions, spillage and wear

 Identify regions of high wear

DISCRETE ELEMENT METHOD is a computational method of modelling and simulation of particles during motion, their influence on the environment and mutual interaction. Available software like EDEM BulkSim allows simulation of almost any physical conditions prevailing during transportation, mixing or crushing taking into account the size and shape of particles, their density, elasticity and the ability to adhere. DEM simulation results deliver many valuable information for engineers like: displacements, velocities, forces and stress in elements/particles of moving medium.

DEM Simulations are currently used in many industries for simulation and optimization of processes and for machine design. Below are examples of DEM simulation capabilities.

MINING AND METALS INDUSTRY

DEM Simulation in mining and metal industry allows:

 Predict and improve performance of quarrying and handling processes in mining combines and conveyors

 Determine optimal shape of excavator buckets

 Determine the real loads acting on elements and next use it for FE structural analysis

 Avoid problems with blockage in transfer chutes

 Avoid demurrage and breakdown

 Reduce energy consumptions by control of flow stream

 Speed design and development processes of modern mining machines

DEM Simulation of coal transfer chute with gentle guide path of coal stream

DEM Simulation of bucket wheel excavator

PROCESSING OF MINERAL RAW MATERIALS

Discrete Element Method works very well in simulation of braking/separation and joining of particles. Thanks to employed Explicit method and automatic contact detection algorithm between particles, DEM allows in an easy way to get reliable results.

Use of DEM for crushing, milling, and mixing processes simulation allows:

 Geometry optimisation of tools, mixers, blades and buckets

 Determine forces and loads acting on operating tools

 Predict process efficiency

 Verify many design configurations without the need of building prototypes

 Speed development and design process

DEM Simulation of rock crushing process

DEM Simulation of mixing process

MATERIAL HANDLING EQUIPMENT

DEM simulations are more and more often used to design modern bulk material transportation system in mines, power stations and electro – thermal plants.

The use of DEM simulation allows:

 Lower energy consumption by optimal selection of discharge angle and velocity of feed stream

 Reduction of dynamic forces during material impact on belt

 Reduction of dust emission by consolidating stream

 Minimise material spillage

 Avoid blockage of material in transfer chutes

DEM simulation of bulk material flow in transfer chute

The use of DEM simulations in the design process of transport systems

AGRICULTURAL MACHINERY

DEM simulation allows better design of agricultural machines like: combines (grain, potatoes, fruits, vegetables), fertilizer spreader and tillage machines, it helps:

 Determine the influence of design on performance

 Reduce the damage of crops

 Accurately determine loads acting on machine elements that next can be used for structural calculations

 Verify machine performance without the need of building prototype

 Reduce R&D cost

DEM simulation of potato harvester

DEM simulation of fertilizer spreader

MULTIPHYSICS SIMULATION (FEA-CFD, DEM-MBD,DEM-FEM)

Multiphysics simulation of bulk material flow with heat transfer and fluid flow allow even more realistic simulation. Coupled DEM with FEA or CFD (fluid-structure interaction) gives much more information about process, efficiency and influence of structure (mechanical and thermal loads). Multiphysics simulation is becoming primary tool for verification of conceptual machines and designs at early design stage. Accurate prediction of loads during loading, transportation or processing of bulk materials is possible thanks to coupled DEM-CFD or, DEM-FEA simulations. Simple data exchange between software for bulk material handling and structural analysis allows engineers design robust & reliable machines without overdesign.

The use of multiphysics simulation in the design and development process allows to:

 Determine the efficiency of various technological processes like: cooling, heating, drying, filtration

 Accurately predict mechanical and thermal loads

 Optimise the strength and weight of structure

 Avoid breakdown during services or testing

 Identify and secure places from wear and corrosion

 Speed development and design process of reliable and energy efficient machines

Coupled DEM-FEA simulations (EDEM-ANSYS)

Multiphysics simulation of drying process of loose material

Coupled DEM-MBD simulations (EDEM-ADAMS)

Please contact us for more information or if you wish to talk to us about a specific project.