Ansys rocky
Author: s | 2025-04-23
Ansys Rocky Student Add-Ins: Rocky Modules Scripts. Ansys Rocky Student Add-Ins enhance Ansys Rocky (found in the Ansys Student free download) with specialized modules and scripts This library extends the functionality of Ansys Rocky by adding a Python interface without changing the core behavior or license of the original software. The use of PyRocky requires a legally licensed copy of Ansys Rocky. To get a copy of Ansys Rocky, see the Ansys Rocky page on the Ansys website.
Ansys Motion – Rocky – Ansys Motion
For running Rocky on the cluster? I have used this syntax:# Apply resources via SLURM#SBATCH --nodes=1#SBATCH --ntasks=48#SBATCH --time=48:00:00#SBATCH --job-name=rocky_test1#SBATCH -o rockycase239_%j.out#SBATCH -e rockycase239_%j.errmodule purgemodule load rocky/2023R1.1Rocky --simulate “StaticAngle2rocky.rocky” --resume=0 --ncpus=48Thank you. Rob Forum Moderator --> I assume the cluster uses a supported O/S? mkhademi Subscriber --> Hi Rob,The cluster is using Red Hat Enterprise Linux (RHEL) version 8.6.I noticed that I should have given the full path of the rocky file to be run. But, again it gave this error:Traceback (most recent call last): File "/home/jenkins/Work/Jenkins/workspace/rocky30-rb-ROCKY-v23.1.1-ansys-newlinux/etk/coilib50/source/python/coilib50/__init__.py", line 42, in LoadCppModule File "/home/jenkins/Work/Jenkins/workspace/rocky30-rb-ROCKY-v23.1.1-ansys-newlinux/rocky30/source/python/rocky30/_cx_freeze_vtk9_hack.py", line 17, in import_hook_wrapperImportError: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by /software/ansys/Rocky/2023R1.1/rocky/bin/lib/python3.6/_coilib50.so) Rob Forum Moderator --> So, no? mkhademi Subscriber --> Oh I see. This is actually surprising for me, because Fluent is running on RHEL. My default was that Rocky is compatible with any Linux OS where Ansys can be used.Thank you Rob! Rob Forum Moderator --> Ansys acquired Rocky & team from ESSS earlier this year, but we've been working with them for longer. As it's from a different development background the OS list is slightly different. It's also gpu focussed with a cpu option so OS requirements are a little different. Fluent came from UNIX, and then moved onto LINUX and Windows. There may be a library you can port, otherwise keep an eye on the release notes as I'd be very surprised if more OS support wasn't in the plan. Note, I don't know about the plan! Miran Ulbin Subscriber --> It does run in batch mode on Centos using --headless in the rocky command line.But it does work on full graphical OS and not on minimal (usual HPC nodes!). I am guessing what libraries are missing as the program freezes as it waits for something. Author Posts --> 1 List of drafts & discarded replies Would you like the Reply to be published? Publish Now February 4, 2022 at 12:33 pm --> The topic ‘Ansys Rocky does not start simulations in Batch mode’ is closed to new replies. #white-section mb-5-->#p-main--> WebinarThe phenomenon called “fatigue,” the accumulation of damage in critical locations due to repetitive cyclic stresses, is one of the leading causes of failure in heavy equipment industries. In this 15-minute webinar, you will see how to evaluate fatigue in a typical critical location, such as a weld for a wheel crusher, combining Ansys Rocky for loading assessment and Ansys Mechanical and embedded DesignLife for fatigue evaluation. This session is part of Rocky in Action, a series of free webinars that offer a realistic overview of simulation workflow and showcase how easily Ansys Rocky enables DEM simulation and solves real engineering problems. Specialists in simulation and CAE applications present these sessions.What Attendees Will Learn:How to use Rocky to get the forces a crusher must withstand during operationSimulate unitary forces in Mechanical, the base cases for a weld fatigue evaluationInclude embedded DesignLife in Mechanical for evaluating weld fatigue, importing the forces as time seriesGet estimated damageAnsys Rocky Ansys EnSight: Leveraging Simulation
Recommending simulation software? Read Whitepaper Ansys LS-DYNA Example Workflow In this whitepaper, we give a quick overview of Ansys LS-DYNA and explain a 10-step workflow and the thinkingbehind each step. Read Whitepaper Ansys Lumerical: A High-Level Overview A PIC (photonic integrated circuit) is an integrated chip that contains components that work with particles oflight, or photons. Read Whitepaper Investigate PCB Thermal Performance with 2022 Enhancements to Ansys SIwave Read Whitepaper Ansys Rocky Particle Simulation Ansys Rocky is the industry-leading discrete element method (DEM) software used for simulating the motion of granular and discontinuous material in a broad range of practical applications. Read Whitepaper See Optical and Photonic Simulations in a New Light Learn how companies around the world are leveraging optics and photonics to boost competitiveness by delivering a better customer and employee experience. Read Whitepaper Reduce Failure and Achieve Meaningful Results in Cardiovascular Devices Companies that make cardiovascular devices face increasing market pressures to get their products approved and available faster. Read Whitepaper Optimize Wireless Systems in Large Facilities with Proper Antenna Placement Read Whitepaper Dispelling Uncertainties Over EMI Simulation for PCB Design Learn about the FCC compliance testing process, the misconceptions, and risks, and how to mitigate design issues with simulation software. Read Whitepaper Return to Home. Ansys Rocky Student Add-Ins: Rocky Modules Scripts. Ansys Rocky Student Add-Ins enhance Ansys Rocky (found in the Ansys Student free download) with specialized modules and scripts This library extends the functionality of Ansys Rocky by adding a Python interface without changing the core behavior or license of the original software. The use of PyRocky requires a legally licensed copy of Ansys Rocky. To get a copy of Ansys Rocky, see the Ansys Rocky page on the Ansys website.Ansys 2025 R2: Ansys Rocky Update
Learning ForumFeedMy PostsHelp --> All Channels Fluids Ansys Rocky does not start simulations in Batch mode Author Posts --> mkhademi Subscriber --> Hi!I would like to simulate a Rocky project in Batch mode on a Windows system. I have added the path to system environmnet and can open Rocky from command prompt. However, when I am trying to run a project with the syntax below, nothing happens. I am using the same syntax brough in the user manual (Appendice 7.5.1) which isRocky.exe –simulate “C:Documentsproject_filename.rocky” –resume=1 –ncpus=7Thanks for an suggestions. Federico Ansys Employee --> Hello,do you get an error message from the prompt or nothing happens at all? I believe your path is missing "/" after C: -> "C:/[...]" mkhademi Subscriber --> Hi Federico,Thanks for your reply. I get no error message. It is just the program does not run, or it does not create .lock file in the project folder.The path I brougtht above was from the manual. I am using the / in my syntax, like"C:\Program Files\ANSYS Inc\v231\Rocky\bin\Rocky.exe" -simulate "E:ROCKY DEM\Workshops or tutorials\Static Angle_BatchRocky23\StaticAngleBatch.rocky" -resume=1 -ncpus=20 Federico Ansys Employee --> Be sure to include two hyphens in your flags "--simulate". Rocky should run in the background.Let me know if that works. mkhademi Subscriber --> Hi Federico,I tried once with the two hyphens, but did not work again. I did the simulations through GUI once. That is why I am using --resume=1. I will setup the simulation again on the GUI without doing the smulations to try again on the Batch mode with the simplest conditions. Meanwhile, can you please write the steps needed to arrange the simulation on Windows with a Batch mode. Maybe I have missed something. For example, Rocky.exe is the only file that must be added to the path? Thank you. mkhademi Subscriber --> Hi Federico,I could run the simulations on my laptop with the same syntax you suggested. I should now check to see what the issue might be on my workstation. Thank you so much. mkhademi Subscriber --> Hi Federico, Thank you again for proposing the solution. The problem on the workstation was that I had two versions of Rocky 2023R1 and 2022R2. The created project was knows as 2022R2 although created by 2023R1, so the Batch syntax was trying to solve a R2022R2 project using 2023R1 version. Thank you again for your help. Federico Ansys Employee --> I'm glad that you were able to resolve the issue. Thanks for sharing your solution! mkhademi Subscriber --> Hi Federico,When I am using the same syntax on the HPC cluster, there will be an error, and inside the error is written "Installing backtrace handlers...success" and the program is not executed. Can you give some general guidelines NotesStarting in 2025R1, Lumerical products are now available in the Ansys automated installer. See Installing Lumerical Using the Ansys Automated Installer for more information.This article provides the standard installation process for Ansys Optics on RHEL and Rocky Linux with the Gnome desktop environment. The process shown will install Ansys Optics in the "opt" folder in the root directory and will require root/sudo access/opt/lumerical/[[verpath]]To install on a custom or shared network location or without root access please refer to this Knowledge Base (KB). RequisitesRoot/sudo access is required for the process shown in this articleInternet access is needed to download/install dependencies.RHEL paid subscription is required for access to RedHat repositories. Refer to this KB for the list of required libraries/packages for RHEL/Rocky Linux.Installation processDownload the installation package. (registration required).Open terminal.Change directory to the download location (default, ~/Downloads) and unpack the installation files.$ cd ~/Downloads$ tar -xf Lumerical-[[ver]]-{version_number}.tar.gzChange directory to the extracted folder and run the install script with sudo access or as root. This will check your system and install any missing dependencies.Follow the directions on the screen and enter desired options to complete the installation.$ cd ~/Downloads/Lumerical-[[ver]]-{version_number}/$ sudo sh ./install.sh Run the Ansys Optics Launcher./opt/lumerical/[[verpath]]/bin/launcherSelect "I have a license from Ansys...".Choose "...configure my license only for Lumerical products" if will be using only Ansys Lumerical products, then "Go to the licensing setup" and configure Ansys Lumerical to obtain the license from your server. Otherwise, "configure my license for All Optics products" if you are using Ansys Lumerical together with either Speos or Zemax and configure your license as shown in this Knowledge Base. If not, you can request a 7-day evaluation license to evaluate our tools. If you are joining a workshop, request the license using your workshop ID/code. Running Ansys LumericalOpen Terminal and run the Ansys Lumerical CAD from the Launcher using the "New Project" button to the right of the solver.Run the CAD directly from the Terminal (default install path shown):/opt/lumerical/[[verpath]]/bin/fdtd-solutions &/opt/lumerical/[[verpath]]/bin/mode-solutions &/opt/lumerical/[[verpath]]/bin/interconnect &/opt/lumerical/[[verpath]]/bin/device *See alsoCustom installation or on shared filesystem in Linux Uninstalling Ansys LumericalAnsys 2025 R1: Ansys Rocky Update
Ansys Blog September 11, 2019 The world is full of particle-fluid interactions and flows. From tablet coatings, vacuum cleaners and pipe erosions, engineers need to study these applications to ensure their products are optimized.The challenge is that traditional computational fluid dynamics (CFD) and discrete element method (DEM) software assume that particles are spherical. The world is rarely this perfect. Simulation of particle transport in a pipe can be used to assess erosion. When engineers need to assess non-spherical particle-fluid interactions, they can create a multiphysics simulation by coupling CFD and DEM using Ansys Fluent and Rocky DEM, from Ansys Channel Partner ESSS. There are two ways to couple CFD-DEM models: using one-way or two-way communication. Simulation shows how the coating of pharmaceutical tablets will dry as hot air is injected into the system One-way CFD-DEM coupling is typically used when simulating dilute flows. In this approach, the fluid field affects the particle flow, but the particles don’t affect the fluid flow.Two-way CFD-DEM coupling is used when simulating dense flows. In this case, the fluid flow affects the motion of particles and the particles in turn affect the motion of the fluid.In both approaches, all of the particles are tracked by a DEM solver using Lagrange methods. The DEM solver explicitly solves the equations that govern the particles’ motion (both translational and rotational) and energy balance. As part of the CFD-DEM coupling, these equations consider the net force and torque placed on each particle by the fluid.In two-way coupling, the information exchange between CFD and DEM works both ways. The pressure and fluid velocities computed by Ansys Fluent are used by Rocky DEM to compute the particle phase volume fraction along with the momentum and energy exchanged between the particles and fluid phases. These values are then transferred to the CFD solver so it can update the pressure and fluid velocities. This two-way exchange of information continues, for each time step, until convergence. The main advantage to coupling Fluent and Rocky DEM is that engineers can accurately perform simulations in which particles have unique, non-spherical shapes. These simulations are better able to predict real-world behavior, because of Rocky DEM’s precise shape representations, in combination with its laws to compute fluid forces on particles.Engineers can model various shapes, including:Custom convex particlesCustom concave particlesFlexible fibersShell particles A CFD–DEM simulation shows how pharmaceutical tablets, with custom shapes, are coated Similarly, engineers can simulate adhesive and cohesive materials using one of Rocky DEM’s adhesion models.In addition, since the DEM solver tracks each individual particle, there is a complete history of particle movement inside the domain. For instance, Rocky DEM can track particle:VelocitiesTemperaturesContact dataWhen this particle history is processed by Rocky DEM’s post-processing toolset, engineers can extract a high level of information from the coupled CFD-DEM simulation. This information provides insight into your application problem and ultimately reduces development costs and time to market.For simulations that have a large number of particles, Rocky DEM can combine the processing power of multiple graphics processing units (GPUs). This2.4. Ansys Rocky Modules
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The Rocky Solver SDK is supported for the following operating systems:Windows 10 64-bitRocky Linux 8 Linux 64-bitThis manual assumes that your system is one of the above and Rocky can perform a simulation successfully in this system.Note: Refer to the Rocky User Manual or search on the Rocky support channels if you were unable to run Rocky.The Rocky Solver SDK package for both supported operating systems can be downloaded from Ansys Customer Portal.It is assumed that users of the Rocky Solver SDK have basic knowledge of the C++ and Python programming languages.Prerequisites for LinuxUnzip the Rocky Solver SDK for Linux in a folder of your choice. Set the environment variable RockySDK_DIR with the location of the unzipped sdk subdirectory.The version of the Rocky Solver SDK is identified in the name of its zip file. It is paramount that you install a Rocky Solver SDK of the same version as the Rocky application upon which your module is designed to run.Note: The version of Rocky can be discovered by choosing Help → About in the application menus.Install the CUDA toolkit 11.7.0 for x86_64 Rocky Linux 8. Set the environment variable CUDA_PATH_V11_7 with the location of the installed CUDA toolkit. Example: CUDA_PATH_V11_7=/usr/local/cuda-11.7/.Build tools - LinuxInstall Miniforge 3 for Linux 64-bit, then, activate a conda prompt and install the following packages:makecmake"gxx_linux-64>=11,The conda prompt now contains a minimum set of tools required to build Rocky modules.Prerequisites for Windows 10Unzip the Rocky SDK for Windows in a folder of your choice. Set the environment variable RockySDK_DIR with the location of the unzipped sdk subdirectory.The version of the Rocky SDK is identified in the name of its zip file. It is paramount that you install a Rocky SDK of the same version as the Rocky application upon which your module is designed to run.Note: The versionComments
For running Rocky on the cluster? I have used this syntax:# Apply resources via SLURM#SBATCH --nodes=1#SBATCH --ntasks=48#SBATCH --time=48:00:00#SBATCH --job-name=rocky_test1#SBATCH -o rockycase239_%j.out#SBATCH -e rockycase239_%j.errmodule purgemodule load rocky/2023R1.1Rocky --simulate “StaticAngle2rocky.rocky” --resume=0 --ncpus=48Thank you. Rob Forum Moderator --> I assume the cluster uses a supported O/S? mkhademi Subscriber --> Hi Rob,The cluster is using Red Hat Enterprise Linux (RHEL) version 8.6.I noticed that I should have given the full path of the rocky file to be run. But, again it gave this error:Traceback (most recent call last): File "/home/jenkins/Work/Jenkins/workspace/rocky30-rb-ROCKY-v23.1.1-ansys-newlinux/etk/coilib50/source/python/coilib50/__init__.py", line 42, in LoadCppModule File "/home/jenkins/Work/Jenkins/workspace/rocky30-rb-ROCKY-v23.1.1-ansys-newlinux/rocky30/source/python/rocky30/_cx_freeze_vtk9_hack.py", line 17, in import_hook_wrapperImportError: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by /software/ansys/Rocky/2023R1.1/rocky/bin/lib/python3.6/_coilib50.so) Rob Forum Moderator --> So, no? mkhademi Subscriber --> Oh I see. This is actually surprising for me, because Fluent is running on RHEL. My default was that Rocky is compatible with any Linux OS where Ansys can be used.Thank you Rob! Rob Forum Moderator --> Ansys acquired Rocky & team from ESSS earlier this year, but we've been working with them for longer. As it's from a different development background the OS list is slightly different. It's also gpu focussed with a cpu option so OS requirements are a little different. Fluent came from UNIX, and then moved onto LINUX and Windows. There may be a library you can port, otherwise keep an eye on the release notes as I'd be very surprised if more OS support wasn't in the plan. Note, I don't know about the plan! Miran Ulbin Subscriber --> It does run in batch mode on Centos using --headless in the rocky command line.But it does work on full graphical OS and not on minimal (usual HPC nodes!). I am guessing what libraries are missing as the program freezes as it waits for something. Author Posts --> 1 List of drafts & discarded replies Would you like the Reply to be published? Publish Now February 4, 2022 at 12:33 pm --> The topic ‘Ansys Rocky does not start simulations in Batch mode’ is closed to new replies. #white-section mb-5-->#p-main-->
2025-03-30WebinarThe phenomenon called “fatigue,” the accumulation of damage in critical locations due to repetitive cyclic stresses, is one of the leading causes of failure in heavy equipment industries. In this 15-minute webinar, you will see how to evaluate fatigue in a typical critical location, such as a weld for a wheel crusher, combining Ansys Rocky for loading assessment and Ansys Mechanical and embedded DesignLife for fatigue evaluation. This session is part of Rocky in Action, a series of free webinars that offer a realistic overview of simulation workflow and showcase how easily Ansys Rocky enables DEM simulation and solves real engineering problems. Specialists in simulation and CAE applications present these sessions.What Attendees Will Learn:How to use Rocky to get the forces a crusher must withstand during operationSimulate unitary forces in Mechanical, the base cases for a weld fatigue evaluationInclude embedded DesignLife in Mechanical for evaluating weld fatigue, importing the forces as time seriesGet estimated damage
2025-04-19Recommending simulation software? Read Whitepaper Ansys LS-DYNA Example Workflow In this whitepaper, we give a quick overview of Ansys LS-DYNA and explain a 10-step workflow and the thinkingbehind each step. Read Whitepaper Ansys Lumerical: A High-Level Overview A PIC (photonic integrated circuit) is an integrated chip that contains components that work with particles oflight, or photons. Read Whitepaper Investigate PCB Thermal Performance with 2022 Enhancements to Ansys SIwave Read Whitepaper Ansys Rocky Particle Simulation Ansys Rocky is the industry-leading discrete element method (DEM) software used for simulating the motion of granular and discontinuous material in a broad range of practical applications. Read Whitepaper See Optical and Photonic Simulations in a New Light Learn how companies around the world are leveraging optics and photonics to boost competitiveness by delivering a better customer and employee experience. Read Whitepaper Reduce Failure and Achieve Meaningful Results in Cardiovascular Devices Companies that make cardiovascular devices face increasing market pressures to get their products approved and available faster. Read Whitepaper Optimize Wireless Systems in Large Facilities with Proper Antenna Placement Read Whitepaper Dispelling Uncertainties Over EMI Simulation for PCB Design Learn about the FCC compliance testing process, the misconceptions, and risks, and how to mitigate design issues with simulation software. Read Whitepaper Return to Home
2025-04-10