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Upcoming Altair Community Events & Your Feedback Needed
Hi Everyone, As we look ahead to the final months of 2025, we're thrilled to announce that we have added few more sessions to our ongoing community series. We want to hear from You! Your ideas and feedback helps us create the experiences our community truly wants. Drop a comment below and let us know what events or…
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【EDEM】How to analysis collision number
Hi all, I’ve been trying to analyze the particle collision number in EDEM 2025.1, but I’m encountering an issue where the collision number results remain zero. So far, I have tried the following approaches: Enabling the Collisional Energy Tracking physics model Running the simulation using the CPU solver only Enabling…
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HeatConduction model with geometry being a heatsource with constant heatflux
Hello everyone, I'm simulating heat transfer in a vibrated bed In my simulation, the geometry will play a role of a heatsource with constant heatflux However, the current built-in HeatConduction model in EDEM only supports setting constant temperature for geometry I have tried to look for a solution through API and found a…
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Can someone help me send some suggestions about Altair software to the development team？
I mainly engage in structural analysis and multi-body dynamics analysis. As an engineer who frequently uses Altair simulation software, the transition from old interface to new interface has shown me a revolutionary change in CAE software. However, there are some small features that I think may require better development…
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Fluent Coupled edem
What data will the coupling interface transfer? Can I obtain the time step size of Fluent within the edem software?
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Coupling of fluent and edem
Can I add custom attributes to the DPM model in Fluent when performing coupled calculation with Edem? This custom attribute will modify the specific heat capacity of the particles. Will the edem side receive this change in specific heat capacity?
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Energy Loss GPU
Dear Experts, We have encountered several questions while using the Energy Loss module to calculate particle collision energy loss and would greatly appreciate your guidance. 1. Criteria for Contact vs. Collision Detection We do not fully understand the specific criteria employed in the code to distinguish between…
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API ParticleBodyForceV3_10_0
May I ask whether there is an example ParticleBodyForce API implemented using the IPluginParticleBodyForceV3_10_0 interface? I have encountered several issues while updating my API, and I was wondering if you could provide an example based on version V3_10_0. Thank you very much.
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Coupling interface issue
Hello, may I ask where I can download the coupling interface for combining Edem2024 with Fluent2024?
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What is usTangentialForce
I would like to ask what usTangentialForce represents in the EDEM. Additionally, could you please clarify why usTangentialForce is not zero when the coefficient of restitution is set to 1? Thank you very much.
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What’s New in EDEM 2026 – Release Highlights
Altair® EDEM™ continues to set the industry standard for the Discrete Element Method(DEM). Now more powerful and user-friendly than ever, EDEM 2026 showcases our commitment to advancing optimization and simulation-driven design by delivering new key features for physics modeling and customization. With this latest release,…
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API programming issue
I customized a const attribute value through the API in edem. How can I set the upper and lower limits for this attribute value in the API program?
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Parameters setting for uniaxial compression of agricultural materials.
When using the BoingV2 model to construct an agricultural material root model for uniaxial compression tests, no matter how I adjust the parameters for the simulation, the post-processing compression force is still very small. The model exhibits penetration, but the post-processing compression force remains very low. Why…
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How to implement DEM-SP (Smoothed Particle) coupling for pore pressure simulation in EDEM?
I am looking to implement a custom Discrete Element - Smoothed Particle (DEM-SP) coupling method in EDEM. My goal is to simulate the effect of internal seawater pore pressure on mineral crushing. This requires calculating fluid pressure gradients based on particle strain rates at each time step and applying these forces to…
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Particle factory in contact with geometry
Is it possible to have a particle factory where the particle is forced to start being in contact with a geometry surface? In my case I want a sphere to start rolling down a circular surface, but the particle is either generated outside the geometry or not close enough to the surface. Thank you. Product/Topic Name : EDEM…
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What should be done when the fluid grid is smaller than the particle size?
When I perform the coupled calculation of Fluent and Edem, if the particle size is larger than the fluid grid size, the calculation will diverge. Are there any methods to make this kind of situation be able to be calculated successfully?
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What are the specific details of running the API program in the Edem2024 system?
When I was writing the API, I didn't know how the particle volume force API worked.
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粒子のパラメータ設定に関する質問
現在，EDEM と Motion View を連携させて数値シミュレーションを行っています． 内容は，EDEM で粒子を容器内に充填し，Motion View で作成した物体をその上に落下させるといったものです． EDEM 側の接触モデルには Hysteretic Spring モデルを使用し，粒子材料にはシリコンゴムを想定しています． 文献に記載されている材料物性値（ヤング率，密度，摩擦係数など）を調べ，それらをそのまま EDEM の粒子パラメータとして入力して解析を行っているのですが，粒子を複数個容器に入れた状態で Motion View との連成解析を行うと，初期高度よりも高く跳ね返るなど，不自然な挙動が発生します．…
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Unified Workflow for EDEM - AcuSolve Coupling in SimLab
SimLab is a process-oriented multidisciplinary simulation environment to accurately analyze the performance of complex assemblies. Multiple physics including structural, thermal, electromagnetics, and fluid dynamics can be easily setup using highly automated modeling tasks, helping to drastically reduce the time spent…
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Stress Mode Analysis for Milling Equipment
Description: Stress Mode Analysis for Milling Equipment Product/Topic Name : Altair EDEM 2025.1.1 Version 11.1.1 I intend to map out the dominant stress (impact, shear, or friction) from simulation runs of mill using different combination of milling parameters. The goal is to determine the intensity (quantitative) of each…
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EDEMpy automated queries
I created a script to run a series of simulations (64 in total) starting from a template deck, which had 3 queries to save the X, Y and Z particle position. However, the queries were not created for the rest of the simulations. Is there a way using EDEMpy to create the queries and extract the data I want without opening…
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Export Geometry from EDEM
Hi All, I’m having some trouble exporting the geometries from EDEM. I selected the folder (by clicking the "…" icon) where I want to export the file, but an error appeared saying that the file path is invalid. Could you tell me how to fix it? Thank you!
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EDEM Crash When Accessing Analyst Interface After Stacking Simulation with 1400 Multi-Sphere Templat
Hello fellow EDEM users and support team, I hope you’re all having a great day! I’m encountering a frustrating issue with EDEM and would greatly appreciate any help or insights you can offer. Here’s the details of my workflow: I batch imported 1400 multi-sphere particle templates using EDEMpy and the CLUMPS library. Then,…
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Fluidized Bed Two-Way Coupling Simulation: Particle Explosion
Description: I am currently working on a simulation of a fluidized bed with paddle stirring. I am encountering an issue where the calculation only works when the medium is air and the inlet velocity is less than or equal to 17 m/s. If these conditions are not met—for example, if a fluid with higher density is used or the…
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Why cannot modify bulk material properties?
Description: I'm trying to modify the parameters for the characterization of the material but when I insert my own value it automatically switches to another one. For example, the default Poisson's ratio is 0,25; if I insert 0,3 and click the "enter" button on the keyboard the Poisson's ratio becomes 0. If I try to use the…
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motionviw&EDEM coupled simulation fails to output plt. file
Hello, I am running a motionviw&EDEM coupled simulation. I am changing the 'mesh coarseness for contacts' to do gird independence test. When the coarseness is 4 and 5, the simulation runs well. But when I change it to 7, It ran, but didn't output the final files like plt. file. See below figure. Any idea what is the…
