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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 API] Varialbe_Cohesion
Hello, I have been working through the EDEM API tutorial and successfully ran 3_Variable_Cohesion. I would like to apply this tutorial to a simulation with three different particle types. Could you please advise which files need to be modified and how they should be changed in order to support three particle types instead…
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[EDEM] Restart from a previously run state
Hello, I would like to restart my simulation from a previously run state and treat it as a new initial condition. Specifically, I run the simulation for 10 seconds, then I want to take that state and restart the simulation again from 0 seconds, applying different conditions or changes from that point onward. Could you…
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[EDEM] EEPA model's initial values
Hello, I am currently running a mixer simulation. I am simulating a mixer that blends three different types of particles, and I am wondering how the initial values for the EEPA model should be set. For the particles themselves, I determined the parameters using the angle of repose via the Open Powder Wizard, and I left the…
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License Error: Unable to check out EDEMGUI License, EDEM v2025.1
I am currently using the student edition of EDEM, and it has been working well for the last few months. I was running a simulation and midway through I got the following error, attached below. I was hoping someone can help me out, I have a University project due in less than a month and I need to view my EDEM simulation…
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How to Generate Spherical Particles in EDEM by Scaling to Specific Volume Values?
Dear EDEM users and team members, I’ve run into a technical question and hope to get some advice from you all. I’d like to know how to generate spherical particles in EDEM that are scaled to specific volume values. For example, I’ve created a spherical particle template with a radius of 10 mm, and I have a CSV file…
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Hi everyone, my EDEM software keeps freezing. Could anyone help me figure out how to fix it?
Dear seniors, I’m having an issue with EDEM 2024: the process gets stuck at 2% when importing particle models in STEP or other formats. Could you please offer some guidance on how to resolve this problem?
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How to define the Aspect Ratio for a non-spherical drag model in CFD-DEM.
I learned from the sieve_base case in Tutorial 6A — Particle Separation in a Harvester, that defining a non-spherical drag model requires defining the Aspect Ratio. However, I am now encountering particles where the length, width, and height are all different, such as elliptical disk-shaped particles or irregular…
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Question regarding particle generation for calibration of different particle types (Dynamic AoR)
I am currently working on a particle mixing simulation and need to calibrate the particle contact parameters. I plan to use the dynamic Angle of Repose (AoR) method using a rotating drum. For parameters involving the same particle type (self-interaction), I assume I can simply generate a single type of particle using a…
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Differences Between CPU and GPU Versions of EDE
Hello everyone, I hope you are all doing well. I am planning to start a new simulation of spiral jet milling using EDEM coupled with Fluent. Due to the high computational cost associated with this work, I am considering switching from CPU-based to GPU-based computation. When I previously worked with EDEM in 2022, I recall…
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EDEM to Simsolid cause localized excessively high stresses.
I am currently importing boundary force data from EDEM into Simsolid for analysis and have noticed localized excessively high von stresses. However, no issues such as local particle penetration were observed. At the same time, when importing different time steps, the location of these localized excessively high stresses…
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Can EDEM identify volume mesh
Everyone in the community ! Suddenly, I have an idea whether EDEM can identify the polyhedral particle grid, and the body grids are connected by bond. Once the bond is subjected to external force, it will be broken. Or whether this function can be realized in the form of API.
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[EDEM] Is it possible to vary the surface energy in EEPA model during an EDEM simulation?
I am looking to implement a model with time-dependent surface energy, defined as a function of time. I understand this requires API customization, but I need guidance on the implementation steps. The EDEM version is irrelevant.
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EDEM 2026 – Fluent 2024 Coupling: Only EDEM 2024.1 Appears in Compiler
Hi everyone, I’m trying to couple EDEM 2026 with ANSYS Fluent 2024, but in the coupling/compile setup the latest available EDEM version shown is EDEM 2024.1. Does this mean that EDEM 2026 cannot be coupled with Fluent 2024, or am I missing a required update/patch or compatibility setting? Please see the attached…
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fluent-edem
Hello, Fluent is coupled with Edem. Can I only use the aggregation function of Edem to handle the thermal properties of particles within the DPM framework of Fluent?
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Modelling sintering neck formation and solid bonding in EDEM
I would like to ask which EDEM model is appropriate for simulating sintering neck formation and solid bonding between particles. In particular, is there a built-in model in EDEM that can represent the evolution of a sintering neck and the resulting solid bond? If there is no suitable built-in model, could you please advise…
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Regarding the truncation ratio parameter in EDEM
What does this parameter mean? What is the upper limit of shattered energy?I think the explanation in another place is the value of Emax/E50, which one is correct? Or did I misunderstand
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Track collision - EDEM
Hello everybody Trying to study collisions in a planetary milll between the milling media (ball-balls, balls-jar) using the "Track Collisions" option. However, when I export the data, all values related to the number of collisions between elements are zero (standard option). Is there anything else I need to do? Thank you.
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I have a question about Tavares calibration of EDEM
In this formula：I want to measure E50 and σ now Assuming that I have conducted many experiments on particle size ranges, I have conducted 20 experiments with a particle size of 10mm and obtained the energy Ek of each stone fragmentation. Then, I divided it by the corresponding weight m of each stone to obtain the specific…
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EDEM command line - Track collisions
When running EDEM using the command line, is there a processing flag to track collisions? The K flag is for extracting collision data. When running a simulation using the command line does EDEM automatically track collisions? I know it can be done using the GUI but I need to run multiple simulations in a cluster. Thank you.
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How to calculate the total volume/equivalent diameter of a cohesion particle cluster using edem API?
Hello, Based on the Variable Cohesion API tutorial, I have implemented a cohesion model that runs on CUDA (GPU), and cohesive particle clusters can be observed during the simulation. My current goal is to calculate, at each time step, the total volume/equivalent diameter of a cohesion-based particle cluster, preferably…
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In EDEM, how the bonds in the Bonding V2 model break?
The coloring of bonds in various states is as shown in the figures above. I would like to understand the criteria or mechanism for bond generation in the Bonding V2 model. In Figure 1, the particle within the red circle has formed black bonds with several surrounding particles, indicating established effective connections.…
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I have a question. When will the coupling interface between EDEM and Hyperstudy be released?
Does the 2026 version support the ability for EDEM to perform DOE analysis in HyperStudy? Has this feature been updated? Specifically, I'm referring to the capability of simultaneously calculating five DOE parameter values, with each calculation utilizing a different GPU, and then, after completing these five calculations,…
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Hyperstudy parameter sweeping for EDEM parameterization scan encountered issues.
I am using HyperStudy to perform a parameterized sweep of the geometric sine motion frequency in EDEM (1–9 Hz). As shown in the figure, HyperStudy reports all runs as successful, but when I check the generated input files, the parameters were not modified. What could be the reason?
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In EDEM simulations, how can the Bond number be obtained?
http://dx.doi.org/10.1016/j.powtec.2015.08.031 The Bond number is a dimensionless quantity representing the ratio of adhesive forces to gravitational forces. It is primarily used to characterize whether particle flowability remains consistent after particle coarsening. For more information on the Bond number, please refer…
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ESTIMATION OF MATERIAL INTERACTION PARAMETERS FOR EDEM
I am trying to model clay particle grinding in a planetary mill using EDEM. My milling jar and balls are made of zirconia, and the particles to be grinded are clay (mixture of muscovite and kaolinite). Are there suggested values on EDEM for the material interaction parameters, i.e. coefficient of restitution, coefficient…
