CFDEM®coupling - User Forum

Hi Josef and Alice

I got a simple problem when CFDEM finishes running but the results stored in individual processor folders in CFD are not automatically copied and combined into time step folders. This rarely happens. Normally after running, CFD results from different processors will be copied into different time steps, so that I can use foamToVTK to convert to VTK files with respect to write _time_step. I did not change anything in the parCFDEM file, all paths and commands are the same.

Can you give me some hints, please ?

Thank you,

Regards,

Hi,
i have installed Openfoam 3.0.x and liggbhts and CFDEM. i have compiled them also. When i open the terminal i get the following error :
using CFDEM_ADD_LIBS_NAME=additionalLibs_ .
!!! ERROR !!!: CFDEM_ADD_LIBS_DIR/CFDEM_ADD_LIBS_NAME=/home/abhinandan/CFDEM/CFDEMcoupling-PUBLIC-/src/lagrangian/cfdemParticle/etc/additionalLibs_ does not exist.

Hi all! I have a question regarding on how to restart a CFDEM simulation.

I want to set up a case that check if the simulation was run before and continue the simulation from the last time step.
I can read a restart file with the last configuration, but how do I check if all the particles were inserted during the first run of the simulation and if I need to insert the rest to achieve the specified number of particles?

PD: I am using the ErgunTestMPI_restart case as a template
Cheers,
Mauro

Hi everyone,
I am trying to delete particles using "delete_atoms overlap" while coupling, but i found the delete_atoms command runs once, how can the command run frequently after particle position updated?
Thanks advance!

Best wishes
xiaobaishu

I'm using OF-4.x to couple with CFDEM. While I compile CFDEM there's an error showing that the cfdemPostproc.C contains an error:

cfdemPostproc.C: In function ‘int main(int, char**)’:
cfdemPostproc.C:118:89: error: passing ‘const Internal {aka const Foam::DimensionedField}’ as ‘this’ argument of ‘void Foam::DimensionedField::operator=(const Foam::DimensionedField&) [with Type = double, GeoMesh = Foam::volMesh]’ discards qualifiers [-fpermissive]
make: *** [Make/linux64GccDPInt32Opt/cfdemPostproc.o] Error 1
waiting...

Dear All
i try to compile openfoam 4 with CFDEMcoupling-4.0. but i faced with below error:

using CFDEM_ADD_LIBS_NAME=additionalLibs_4.0 .
!!! ERROR !!!: CFDEM_ADD_LIBS_DIR/CFDEM_ADD_LIBS_NAME=/home/cfdemlab/CFDEM/CFDEMcoupling-PUBLIC-4.0/src/lagrangian/cfdemParticle/etc/additionalLibs_4.0 does not exist.
************************************
WARNING from your CFDEM code!
WARNING: Coupling with your OpenFOAM(R) version is currently under development!
In doubt switch to another version.
************************************

Hello! here is the installation tutorial which works fine for me

1)lets install OF231 following the procedure

http://openfoam.org/download/ubuntu.php

(instead of sudo apt-get install openfoam240 you should use sudo apt-get install openfoam231 or try this "cfdemSolverPiso is based on pisoFoam
and if you compare the options file of pisoFoam (version 2.4.x) with the same file from 2.3.x version you will notice that they differ by:

-I$(LIB_SRC)/meshTools/lnInclude

I have successfully installed Liggghts, cfdem and openfoam. Liggghts is perfectly running, went on to test cfdem coupling and I can execute the 'Allrun.sh' files in tutorial folders but no matter which I pick, CFDEM seems to be deleting the results files before I can have a look at them!

I check the case folder and I can see the cfdem dumps being created '0, 0.1, 0.2 etc' but when the run is complete, these are deleted....

Here is snippet of the terminal window at the end of the run:

Hi there,

i try to run a coupled simulation with servo wall pushing on some kind of particle column. An overview of the geometry is give in the attached screen shots. Actually, the particles are within a pipe, but for the sake of visibility this is not shown in the overview. The red circular face is the servo wall. The fluid region is meshed with snappy.
Running the simulation in DEM only is done without problems, however the coupled run dies at the first DEM run. From the log-file it seems that the mesh/surface/stress/servo makes some problems:

Please help me. I'm trying to compile CFDEM, I compiled with sucess openFoam 3.0.1 and LIGGGHTS 3.5.1, and the CFDEM compilation give-me this error: