CFDEM®coupling - User Forum

Dear all
I just intalled the CFDEM and I try to run the tutorial case- fillCyliner, but the terminals shows that I can't start the paraview.It says:
trying to start paraview...
./Allrun.sh: line 81: /home/daye/software/ParaView-4.3.1-Linux-64bit/bin/paraview: No such file or directory
And the detail is:
daye@daye:~/CFDEM/CFDEMcoupling-PUBLIC-3.0.1/tutorials/cfdemPostproc/fillCylinder$ ./Allrun.sh
mesh needs to be built
/*---------------------------------------------------------------------------*\

Hello,

while running periodicChannel tutorial I found some results I'm not able to explain:
the velocity of the fluid has a value of up to 10.19 m/s where the largest part is the x component.
The initial conditions in the CFD part are 0 or zeroGradient for all boundaries. Gravity is acting in z-direction. Inlet and outlet are defined as cyclic.
In DEM there is a particle velocity of 1 m/s in z-direction.

Doe's anybody has an explanation for this behavior?

Later I want to modify this case to some kind of cavity with some filtration at the bottom.

Hallo,
when using parCFDDEMrun.sh to continue a parallelzied calculation (without reconstruction) old results in the processorx folders are deleted. Is it possible to turn this off?
Best
Karl-Heinz

Dear all
I am converting Liggghts dump files to vtk format, but there is a problem that OPENFoam and Liggghts scale in Paraview are not the same.
the error is:

Hi everyone!

Thank you to all that have helped me install LIGGGHTS and CFDEM recently on my personal laptop. Now I am trying to install the same on my university's cluster. Obviously being a lowly postgrad student I am not on the sudo'er list, therefore I am not able to install things via git etc, therefore the I'm not quite able to follow the instructions online for LIGGGHTS and CFDEM compilation. I am able to rsync anything onto my home directory however

Hi everyone,

I have a trouble with the following code:

Executing command: 'set region total property/atom Temp 600.000000 '
set region total property/atom Temp 600.000000
ERROR: Set command with no atoms existing (../set.cpp:106)

can anyone help me?

Hallo,

I have a question about the Voidfraction model divided. In my simulation particles start to rotate when they attach on the edge of a surface. Does this rotation have to do with the divided approach (e.g.. di Felice drag)?

Particles are split into pieces as the documentation said. Does this lead to rotation if a particle is located in two CFD cells? Or are only translational motions calculated?

Thanks for your help. Best wishes,

Johannes

Hello, I'm facing this problem with the new version of CFDEM Coupling.
I'm attaching the log file of the simulation, but the error starts as:

Hi,

can someone explain a bit how to use smoothing model (constDiffSmoothing). I have read Docs about it but I think there is something else to be done beside just defining it in coplingProperties dictionary. I also added sSmoothField and vSmoothField to initial time directory and defined zeroGradient boundary conditions but after that I get an error:

--> FOAM FATAL IO ERROR:
keyword sSmoothField is undefined in dictionary ".../CFD/system/fvSolution.solvers".

I am using 2.3 version of CFDEM and cfdemSolverPiso.

Hi all,

Just a quick question. Is BeetstraDrag implemented in the current CFDEM? I can see enrties in the couplingProperties file in the tutorial, but couldn't find the source code. Do I need to build it myself or it is hidden somewhere?

Cheers,
Linhan