Welcome
What's New
New features and enhancements available in EDEM.
About EDEM
EDEM is a high-performance simulation software for bulk and granular materials.
Release Notes
This section contains information about the EDEM release, such as key features, enhancements, bug fixes, and known issues.
Tutorials
Start using EDEM with our interactive tutorials.
Get Started with EDEM
The EDEM user interface comprises three icons for each simulation component - Creator, Simulator, and Analyst.
EDEM Creator
EDEM Creator is the pre-processor for creating an EDEM simulation model, including setting up equipment and defining the generation of bulk materials.
EDEM Simulator
EDEM Simulator is a powerful solver used for fast and efficient simulations.
EDEM Analyst
EDEM Analyst is the post-processor used to analyze and visualize the results of your simulation.
EDEM Contact Models
A Contact Model describes how elements behave when they come into contact with each other.
EDEM Cal Utility
EDEM Cal is a utility which works with EDEM and is designed to assist in performing calibration.
EDEM Calibration Kits
The EDEM Calibration kits are a collection of EDEM models of standard bulk solids characterization tests commonly used for EDEM material model calibration.
GPU CUDA Guide
The EDEM CUDA GPU module uses the latest General Purpose Computing on Graphical Processing Units (GPU) technology.
Programming Guide
The EDEM Programming Guide describes the EDEM API.
Coupling Interface Programming Guide
The Coupling Interface Programming Guide provides an overview of how to use the EDEM Coupling Interface to couple with a generic CFD code and/or Multi Body dynamics codes.
EDEMpy
EDEMpy is a Python library for accessing EDEM data from .h5 files (the underlying EDEM file format). EDEMpy does not require prior knowledge of advanced programming.
EDEM Solver Capabilities
EDEM contains four solver engines.
Appendix
This section provides additional information about how to estimate simulation time, supported EDEM File types, attribute definitions, and so on.
- EDEM File Types
  This section lists the EDEM file types, including Standard and Optional supported file types.
- Estimate Simulation Time
  It is challenging to estimate the exact real time required for a DEM simulation, as each simulation and each computer is different.
- Attribute Definitions
  The following tables provide detailed descriptions for Particle, Geometry, Contact, and Collision attributes.
- Calculate Characteristic Length
  The Characteristic Length is the average length of each feature in the CAD file.
- Disable FMA in CUDA
  The CUDA compiler applies an optimization method known as Fused-Multiply-Add (FMA) which combines addition and multiplication into a single instruction.
- Use EDEM on a Remote Desktop
  Generally, simulations are set up on Windows. However, the simulation is run on a Windows or Linux processing machine which is remotely located.
- Command Line Example Commands
  This section provides examples of the default processing options, and how to specify processing options and run simulation and export data.
EDEM Terminology
Definitions of terms used in EDEM.
References and Bibliography
This section cites the contributions made by various authors and sources that have been used as reference material for EDEM, and the specifics of how they have been applied can be found in the individual contact model sections.

Disable FMA in CUDA

The CUDA compiler applies an optimization method known as Fused-Multiply-Add (FMA) which combines addition and multiplication into a single instruction.

For more information about Fused-Multiply-Add (FMA), see https://docs.nvidia.com/cuda/floating-point/index.html#fused-multiply-add-fma.

This will improve the performance, However, there are some cases where it can cause the simulation results to change by a small amount. It is recommended to disable this option when developing new code and trying to compare results between versions.

You can disable this optimization by passing the following command line option:

--nofma=1

You can also disable this option in the Advanced Settings dialog box in the Simulator options.

Note: This is an option that can be enabled as the default setting.