CFDEM®coupling - User Forum

Hello,

I keep getting a segmentation fault when I start approaching 40 cells / diameter. Under 30 cells / diameter is fine, and I have this issue both on my laptop and the cluster at my univesity. I'm running this with cfdem-pfm, though I recall having what initially appeared to be the same problem with cfdem-public. I've narrowed down the issue to the buildLabelHashSet function in IBvoidfraction.C. To determine this, I put an info warning around when it's called:

Hello everyone,

I am trying to install CFDEMcoupling on Fedora Linux.

Generally I am following the installation of CFDEMcoupling from :https://www.cfdem.com/media/CFDEM/docu/CFDEMcoupling_Manual.html

For now the good thing is that I have downloaded all software and compiled OpenFOAM successfully, so the only work is the last step to compile LIGGGHTS® and CFDEM®coupling with ‘cfdemCompCFDEMall’ command. However the problem occurs.

Hi everyone,

I'm a new user to LIGGGHTS, and I'm having a tough time creating a simple simulation.

I want to create a simulation where a single particle (metal particle) falling from air and another simulation where a single particle is falling in viscous medium (like a resin).
When a particle falls in air, it'd just have a gravity force acting downwards on a particle.
When a particle falls in a viscous medium, it'd have a drag force acting on the system. So, how can I add drag force acting on the particle

Good morning, I am very interested in CFDEMcoupling for research purposes. I have a simple question. Which is the last OpenFOAM version (ESI Group) that can be used for compiling with the latest CFDEMcoupling 3.8.0? Apparently, it is the very old v1612+ (14 versions have been released after this). Cannot be compiled on newer OpenFOAM versions? A lot of feature have been added in newer versions. Plus, it is not easy to compile in newer Ubuntu releases (e.g., 20.04 LTS, 22.04 LTS). Thanks in advance for your reply.

Dear all,

We defined a group in LiggghtsCommand) , and then plan to print the total number of atoms in the group to a file.

executeProps0
{
command
(
group dele variable melt // melt was defined in liggghts
variable num equal count(dele)
print $num append noBlanks nummelt dot txt
);
runFirst off;
runLast off;
runEveryCouplingStep 1;
runEveryWriteStep off;
verbose;
}

I was installing CFDEM and experience this error:

meshe@meshe:~$ cfdemCompCFDEMall
copying patch files for LIGGGHTS if available
cp: cannot stat '/home/meshe/CFDEM/CFDEMcoupling-PUBLIC-5.x/src/LIGGGHTSpatch/*': No such file or directory

Hi all,

I was following this document and everything went as expected until the .runMe.sh step
https://www.engineerdo.com/wp-content/uploads/2021/02/Installation_CFDEM...
I am trying to install this on my university computer to run a few Sims.
I see the following error; please give me a few hints on how I could solve this problem.

It seems the currently recommended OpenFoam version for compiling with the latest CFDEMcoupling 3.8.0 is version 5.x. However, this is a very old OpenFoam version, and I wonder if there are any reasons why the newer versions such as 7 or 8 cannot be used. Is there any experience on coupling with newer OpenFoam versions?

I have followed this video for CFDEM installation
https://www.youtube.com/watch?v=V6VaVE6VB0g

I am not able to run this command cfdemCompCFDEMall

Hello everyone,

I am beginer in CFD-DEM. I want to simulate the movement of soil particles under fluid flow.

Firstly, I generated the flow channel using Blender. Next, I used HYLEX-OS for CFD. After that, I used LIGGGHTS to create the particles. I have a problem when generating a flatbed.

Please help me solve it, if you have documents related to this problem, please share them with me.

I also attached my file below, if you have time, please have a look.

Thank you so much.

Best regards.