cemfDEM®

This the DEM code developed in FORTRAN standard. It can perform DEM simulations for spherical particles. This DEM code benefits from various optimization algorithms giving rise to its execution speed, though it not parallel. Therefore, simulating tens of thousand particles within a reasonable time is possible. This code can be compile and run under both Windows- and Ubuntu-based operating systems.

  • Particles: Particles with single size, or size distribution, or various density, or physical properties can be simulated.
  • Geometry: The geometry of parts (container, blades and etc.) can be as simple as a cylindrical drum or as complex as a helical blade. A combination of linear and rotational motion can be specified for parts (blades). STL files can be imported into the program to define geometry parts. 
  • Integration: Various integration methods from single-step to multi-step methods and with various numerical precision from the first order to fifths order are implemented in the code.
  • Contact force models: Both linear and non-linear contact force with non-limited and limited tangential displacement models are available in the code as well as rolling friction models.
  • Contact search: Efficient contact search methods suitable for systems single size and systems with wide size distribution are implemented in the code to be used. So, the simulations with multi-sized particles run as efficiently as the simulation with single size particles.

Get cemfDEM® code

This program is open to public and can be used for non-commercial use. Although we carefully developed the physical models in the code, but there is no warranty for the simulation results. The code can also be customized to be fitted for a special application. You only need to cite us whenever you are using the results obtained fully or partially from this program. You can download this code from the website. We provided a set of samples with descriptive tutorials to help you to compile and perform simulations with this program. 

How to use cemfDEM®

You first need to download the code and then compile it on your computer. The code was tested under Ubuntu 14.04 LTS, Ubuntu 18.04 LTS and Windows-based operating systems. We compiled and tested this code with following compilers:

  • Intel Fortran 2013 and 2015 on Windows
  • Intel Fortran 2015 on Ubuntu 14.04 LTS
  • gfortran-4.9 on Ubuntu 14.04 LTS
  • gfortran-5.0 on Ubuntu 18.04 LTS
  • gfortran-7.5 on Ubuntu 18.04 LTS

A set of sample tutorial are provided below to teach you how to use various features of the code.

cemfDEM® Tutorials

Two: A DEM simulation to create a random packed bed of spheres with size distribution

Two: A DEM simulation to create a random packed bed of spheres with size distribution

In this DEM simulation, we create a random packed bed of spherical particles in a cylindrical container with the diameter of 15 cm and height of 20 cm. Particles are…

One: A discrete element method simulation to created a packed bed of spheres

One: A discrete element method simulation to created a packed bed of spheres

In this simulation, we create a random packed bed of particles (packed bed of spheres) in a cylindrical container with the diameter of 15 cm and length of 20 cm.…

Simulation of Slurry phase HDPE reactor

Simulation of Slurry phase HDPE reactor

High density polyethylene is produced by polymerizing ethylene (HDPE) and in cases co-polymerizing with propylene and 1-butene to achieve the desired density and properties. Hydrogen is also used to control…

reactingFoam: How to simulate combustion of a flame by OpenFOAM

reactingFoam: How to simulate combustion of a flame by OpenFOAM

You will learn how to use reactingFOAM solver to simulate a turbulent combustion of methane in air. The simulation is based on the combustion of methane in the Sandia D…