ESSS Rocky DEM 4.5.0

ESSS announces the newest release of its powerful Discrete Element Modeling software – Rocky DEM 4.5. This release delivers significant advances in solving particle dynamics engineering problems, enabling much faster solution of applications with large numbers of particles. Rocky DEM 4.5 also expands the innovation possibilities of particle-laden systems through expanded integration with Ansys simulation software, further supporting customers’ digital engineering strategies.

Release highlights include:

- Increased ability to simulate free and rigid body motion through coupling with Ansys Motion multi-body dynamic software, helping engineers account for flexible components, kinematic forces, and link chains. Together with Ansys Motion, Rocky 4.5 performs analyses that consider the stress and deformation of flexible body components.
- Expanded CFD-DEM capability now includes a broader range of particle-fluid applications, plus solutions for flows where particles are much larger than CFD mesh, all in a well-integrated workflow with Ansys Fluent.


Sample snapshots of enhanced Rocky Ansys Fluent post-processing from a particle drying simulation – Fluid and particle temperature (left), Fluid flow velocity and particle drying rate (right)

- Seamless integration with Ansys optiSLang supports model calibration and enables large-scale design exploration for design optimization and verification. In addition, Rocky users can now generate reduced order models (ROMs) for their process simulations to implement digital twins in Ansys Twin Builder and on a variety of software and hardware platforms.
- Integration with Ansys Minerva for efficient simulation processes and data management.
- Multi-CPU and multi-GPU improved performance and scalability for all applications. Performance tests for this new release showed impressive advancement across the board when compared to previous releases, with gains ranging from 50% to 1000%, depending on the application type.
- Expanded solver API and GUI customization support, with an additional 30+ ready-to-use specialized physical modules. Rocky 4.5 expands the existing API library template available for customers to download. With additional exposure, users can do even more with Rocky, like working on their own breakage models and custom CFD coupling laws.



ROCKY DEM allows precise prediction of the particle behavior of granular and liquid systems by analyzing media flows, energy absorption rates and particle breakage. Wherever large quantities of particles and bodies are set into motion in bulk, mixing, slipping or flow processes regardless of their size, shape, material or adhesion, ROCKY can help to understand and improve the processes.

These are, on the one hand, measures for optimizing the movement of the mass, for example to minimize material losses or to prevent or suppress dust formation. On the other hand, the results provide important information for efficiently designing peripheral products, for example to increase the service life of conveyor belts and other components.

ROCKY DEM optimizes, among other things, agitator mills, SAG mills, crushers and high-pressure grinding rollers, the particle spectrum ranges from small synthetic parts such as tablets to gravel.

With ROCKY for ANSYS particle simulation can be extended with important structural and flow-mechanical information. These are achieved by a complete integration in ANSYS Workbench. The compact and user-friendly user interface of ROCKY for ANSYS ensures uncomplicated installation and operation. CAD geometries can also be imported easily and quickly.

Rocky DEM 4.5 simulation software is accelerating engineers’ use of particle modeling through improved computational speed, solver flexibility, and deeper integration with Ansys

Rocky DEM provides decisive insight into granular flow behavior with accurate particle representation.


Engineering Simulation and Scientific Software (ESSS) is an innovative international provider of engineering simulation products and services operating in more than 10 countries. With over twenty-five years of experience and over 200 employees, ESSS is a well-established Ansys channel partner. In addition, ESSS develops new simulation tools, runs the ESSS institute, and drives broader adoption of customized CAE solutions in the energy industry.

Product: ESSS Rocky DEM
Version: 4.5.0
Supported Architectures: x64
Website Home Page : https://rocky.esss.co/
Languages Supported: english
System Requirements: PC / Linux *
Size: 1.4 Gb