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EDEM Physics Models
A Contact Model describes how elements behave when they come into contact with each other.
Physics Models and GPU Device Compatibility
The EDEM Solver can run on both CPU and GPU(CUDA) hardware platforms.

Welcome
What's New
This section describes the key features in EDEM version 2025.1.
About EDEM
EDEM is a high-performance simulation software for bulk and granular materials.
Hardware Requirements
This section details the minimum system requirements and requisites for running EDEM.
Release Notes EDEM 2025.1.1
This section contains information about the EDEM 2025.1.1 release, such as bug fixes.
Release Notes EDEM 2025.1
This section contains information about the EDEM 2025.1 release, such as key features, enhancements, and bug fixes.
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 Physics Models
A Contact Model describes how elements behave when they come into contact with each other.
- Base Contact Models
  Base Contact models define the physical collision between particle materials or particles and geometries.
- Friction Models
  Rolling Friction is the resistive force that slows down the motion of a rolling object.
- Additional Models
  You can also add additional models to a simulation.
- Particle Body Force Models
  You can define a particle body force to act on particles when a specified condition is met, when particles are in certain positions, or are traveling at a specified velocity.
- Field Data Manager
  Field Data Manager allows you to import and manage field data for use in a Custom model (typically, a Particle Body Force).
- Physics Models and GPU Device Compatibility
  The EDEM Solver can run on both CPU and GPU(CUDA) hardware platforms.
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 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.

Physics Models and GPU Device Compatibility

The EDEM Solver can run on both CPU and GPU(CUDA) hardware platforms.

The solver engine to be used will be determined by the hardware as well as the simulation settings. The GPU engine can only be used when all models in a simulation are supported, otherwise, the entire simulation will run on the CPU.

The following table provides details about the Physics models that are supported by the solver engines.


Models	Name	CPU	CUDA
Base Models	Hertz-Mindlin (no slip)	●	●
	Hertz-Mindlin with JKR	●	●
	Hertz-Mindlin with JKR V2	●	●
	Hertz Mindlin Nassauer Kuna		●
	Edinburgh Elasto-Plastic Adhesion	●	●
	Hysteretic Spring	●	●
	Linear Spring	●	●
	Effective Sphere Cohesion**		●
	Volume Spring**		●
Rolling Friction Models	Standard Rolling Friction	●	●
	Type C Rolling Friction	●	●
	RVD Rolling Friction (Deprecated)	●	●
	Spinning Friction		●
Additional Models	Archard Wear	●	●
	Bonding V2	●	●
	Electrostatics	●
	Fibers Bonding	●
	Heat Conduction	●	●
	Hydrodynamic Lubrication	●	●
	Linear Cohesion V2	●	●
	Linear Elastic Bonding	●	●
	Liquid Bridge and Exchange	●	●
	Oka Wear	●	●
	Relative Wear	●	●
	Spray Coating	●	●
	Tavares UFRJ Breakage	●	●
	Tribocharging	●
	Wet Mixing**	●	●
Particle Body Forces	Ganser Drag	●	●
	Haider and Levenspiel Drag	●	●
	Magnus Lift	●	●
	Morsi and Alexander Drag	●	●
	Saffman Lift	●	●
	Schiller and Naumann Drag	●	●

Note: **Experimental models are available in Options > Additional Components > Enable Experimental Contact models.

Chaining for GPU API is supported. However, only one Base model is supported at the same time, including any additional API models.

For more information about the GPU Solver, see the GPU CUDA Guide.