CFDEM®coupling - User Forum

Hi,
I am trying to set up my first (modified) CFDEM case inspired by the
ErgunTestMPI case.

My setup is a square box sheared on top with a velocity inlet, a outlet
and periodic conditions in lateral direction (top moving wall, bottom fixed)

I can run the case without problems in pisoFoam.

For the particles I insert a few (3-5) particles in the center of the box
similar to the in_init function of the ErgunTestMPI

I also took the coupling parameters from this case.

I can run the init function in liggghts

Hi

I am not sure if this is the cause of the problem, but a few days ago I reduced my CFD cell size to be about 3 particle diameters. The simulation runs fine in parallel (12 cores), but when I run reconstructPar, I an error when it tries to reconstruct the lagrangian fields (e.g. caseDir/processor0/0.1/lagrangian/). ReconstructPar still runs fine with my original mesh.

I couldn't find any obvious fix after searching online, so I have posted the last bit of the screen output below to see if any one has had this problem as well. I am running OF v2.1.1. and CFDEM v2.5.3.

hi, I am a new learner of CFDEM. there is a question puzzling me a lot. I want to do some 2D simulation via CFDEM, such as one-dimensional consolidation. But I fail and the error message indicates that :
ERROR: Could not create 3d grid of processors (procmap.cpp:65)

It seems that parCFDEMrun can only handle 3D problems,right? Or there is some tips for run 2D problems.

Could anybody help me??

thanks~~~~~~!!!

Hi CFDEMers,

As in the subject, is there a simple way to shut off the collision, i.e. allow the particles to overlap?

Thanks.
rq

Hi all,
I compile the CFDEM and LIGGGHTS according with "githubAccess_public.pdf" , this seems works well, but in output show many warnings, such as [-Wunused-parameter] in both cases (cfdemCompLIG , cfdemCompCFDEM).

When I try run any example, the next error appears (in cfdemSolverPiso ):

Hi folks,

Hi,
I am a new learner of CFDEM,I tried the tutorial example of twospheresglowinskiMPI, and I have delete the"rm -r $casePath/CFD/0.*",but there are still no CFD writing file of 0.*, I want to know why~~~

Hi all,

I've have got some results from an OpenFOAM simulation (interFaom was the solver) and now I want to couple this results to LIGGGHTS, i.e. making LIGGGHTS use this fields (U, p) to calculate DEM.

I read about the coupling method but couldn't find a way to disable OpenFOAM cicle. If I can turn off this calculus i will be able to replace the fields for the ones that i've got from interFoam.

Does anyone know about how i can modify the scheme?

Thanks in advance!

Hi all, i try to use the solver cfdemSolverPiso for my own case, for this I modified the ErgunTestMPI example.
When i run my case output is:

Hi,

I'm trying to CFDEMcoupling (using the command cfdemCompCFDEM), but I got the following error when trying to compile the solver and postprocessing utilities:

mkdir: cannot create directory `': No such file or directory

I've been looking at the bashrc files, and the environment variables seem to all be correct. I got the following message for cfdemSysTest:

*******************
system settings:
*******************
CFDEM_VERSION=PUBLIC
couple to OF_VERSION=2.1.x