CFDEM®coupling - User Forum

I make the changes in /.bashrc according the tutorials. When I open a new terminal, it shows me:

using default CFDEM_ADD_LIBS_DIR=/home/cae/CFDEM/CFDEMcoupling-PUBLIC-3.0.1/src/lagrangian/cfdemParticle/etc/addLibs_universal
using default CFDEM_ADD_LIBS_NAME=additionalLibs_3.0.1
!!! ERROR !!!: CFDEM_ADD_LIBS_DIR/CFDEM_ADD_LIBS_NAME=/home/cae/CFDEM/CFDEMcoupling-PUBLIC-3.0.1/src/lagrangian/cfdemParticle/etc/addLibs_universal/additionalLibs_3.0.1 does not exist.
make new dirs /home/cae/CFDEM/cae-PUBLIC-3.0.1 ? (y/n)

As noted in the online documentation:
//////////////////////////////////////////////////////////
liggghtsCommandModels
(
execute
);
executeProps0
{
command
(
run
$couplingInterval
);
runFirst switch1;
runLast switch2;
runEveryCouplingStep switch3;
runEveryWriteStep switch4;
verbose;
}
///////////////////////////////////////////////////////////////////

I noticed that even I set in controlDict as below:

startFrom startTime;

startTime 0.05;

stopAt endTime;

endTime 0.1;

deltaT 0.001;

writeControl adjustableRunTime;

writeInterval 0.01;

The folder for time=0.1 will not be generated. Does anyone can tell me how to get it?

Hi, everyone

I face a error when I used the command Fix insert/rate/region, and I don't know what is the reason, anyone could give me some suggestions?

Coupling...
Starting up LIGGGHTS
Executing command: 'run 5 '
run 5
ERROR: Fix insert/rate/region (id ins): 'start' step can not be before current step (../fix_insert.cpp:573)

I list the input as belowe

echo both
log ../DEM/log.liggghts
thermo_log ../DEM/post/thermo.txt

Hi everyone,

I have a problem as below,
In a 4 seconds long CFDEM run, I'd like a liggghts fix command (a fix addforce command) to be executed once at two seconds. Does anyone know how to realize it?
I have tried the liggghts command execute in CFDEM, but failed.
Any suggestion is appreciated.

regards,

Zhou Yu

Hi,

I have encountered one problem as follows: I use the Ubuntu 16.04 and OpenFoam of 3.0.0 version. Could anyone help me? I appreciate your help and time.

cfdemCompCFDEM

Any can help?

This is the log: https://paste.ubuntu.com/24342242/

I dont know if the compilation are fine.

see log: https://paste.ubuntu.com/24340600/

Why the "$WM_NCOMPPROCS = " dont show any numbers? How I can change this?! It's a problem?

Thanks

Hi all,

I installed OpenFOAM 3.0.x and compiled the latest version of LIGGGHTS with cfdemCompLIG without any problems. The cfdemSysTest looks as follows:

*********************************************
* C F D E M (R) c o u p l i n g *
* *
* by DCS Computing GmbH *
* www.dcs-computing.com *
*********************************************

Dear CFDEM enthusiasts,

I am currently running a simulation using the IB solver and I am experiencing very high computation times. Does anybody have experience in using this solver and can maybe tell me if this are usual computing times or if I am doing something wrong?

The simulation is running on 4 cores while the Computer posseses 128 GB of RAM. Around 400 particles are in the system but for 50 particles the simulation does not seem to run faster. I am using 4 cells per particle diameter.