CFDEM®coupling - User Forum

Hello CFDEM forum,

I'm new in with CFDEM, and i'm facing the same problems as discussed in CFDEM Compiling Problems. I have this error:

Unable to open document
file:///home/dina/CFDEM/CFDEMcoupling-PUBLIC-2.3.1/tutorials/cfdemSolverPiso/ErgunTestMPI_cgs/CFD/octave/cfdemSolverPiso_ErgunTestMPI.eps

Someone posted to change the path values, so I looked at the file "totalPressureDrop.m" in /tutorials/cfdemSolverPiso/ErgunTestMPI_cgs/CFD/octave/ and I have this path values

%path = '../probes/0/p'; % 2.1.x
path = '../postProcessing/probes/0/p'; % 2.2.x

The file CFDEMcoupling-PUBLIC/src/lagrangian/cfdemParticle/cfdTools/versionInfo.H mentions a particular version of OpenFOAM compatible to the CFDEMCoupling-PUBLIC. The version mentioned is "OFversion="2.3.x-commit-4d6f4a3115ff76ec4154c580eb041bc95ba4ec09":"
Can anyone tell me where to find in git this particular version and how to install it.

Hi,

I am trying to write a new solver to couple the compressibleMultiphaseInterFoam and LIGGGHTS, using the cfdemSolverPiso solver.
I want to know forces on the particle and not to have the effect of particles on the flow. So the flow should be solved independent of the presence of particles.
I created a solver and it is compiled successfully. The problem is when I run the solver I get the following error.

Hello everyone

Since few days I am trying to install and run CFDEM coupling. After several troubleshooting and help of Christian Richter. I managed to install CFDEM, OF and LIGGGHTS properly and run the tutorials partially. When I run tutorial cfdemSolverPisoScalar/packedBedTemp then I get peculiar errors related to LIGGGHTS. The log file for this run is attached. The part of terminal output is pasted below.
[Anyone please help me hint to get rid of the issue]

Similar error I am getting for the cases cfdemSolverIB/twoSpheresGlowinskiMPI, cfdemSolverPiso/ErgunTestMPI

Dear all
I have some questions when run my cases.Firstly,the "nr particles" sometimes decrease or sometimes turn to 0 immediately at some timestep,and this often cause divergence of my case.And I try to increase youndsModulus peratomtype,but I found this method might change the nr particles in the first timestep.How can I solve the problem? If anyone can give me some advices ,I would very very appreciate. Thanks

Good morning to everyone,
I am trying to create a dynamic mesh around some particles sedimenting inside a container of constant volume. My problem is that I cannot find out what kind of scalar I can insert for "field" in the DynamicMeshDict file.
Please help me, I am in a great rush!

hi everybody
i am simulating what "Klemens Gruber" has done to model sediment bed load tranportation
(http://www.jku.at/itp/content/e61131/e111072/e112573/e196534/e196561)
i need to include a turbulent lift model named "Zanke" lift model (which is necessary for packed particles)
does anyone know whether CFDEM has such a turbulent lift force or not?
and if not , where can i find the code?
i myself wrote its code but it seems does not work well!

Dear all,

In coupled cases, the data of particle radius, position and velocity are given from DEM. (src/lagrangian/cfdemParticle/cfdemCloud).

As I need the information of particle id as well, I modified the cfdemCloud.C , cfdemCloud.H, cfdemCloudI.H and basicIO.C by adding several lines to bring in the information of particle id.
After the compilation(wclean, wmake libso), everything seems fine and no error occurs.

But when I run a case, the error appears:

Hello everyone,

I installed OF, LIGGGHTS and CFDEM on a cluster.
I works fine for my useraccount, but if someone with the same permissions as me tries to run an example-case, the terminal says "mpi cannot find executable" or something similar (I dont have a screenshot or exact problem description for now. If its needed, I can add more details next week).

OF and LIGGGHTS work fine for other users.

Dear all,

Is it possible to control the life-time of particles in LIGGGHTS?

I want to simulate some solid-like droplets in the jet. Because of huge particle number, I think control the particle life time is an idea.

Thank you for any suggestions.

Best regards,
Zhaochen