CFDEM®coupling - User Forum

Hi,
I was wondering if it is possible to run a pure CFD case first, and afterwards couple the CFD case with a DEM case? Can one of the exchange models handle such a task?
I am looking forward hearing from you.

Cheers

Hello Community

Hi All ,

I am getting this error while running a CFDEM tutorial . Not able to find out .

Unable to open document “file:///home/vivek/CFDEM/CFDEMcoupling-PUBLIC-5.x/tutorials/cfdemSolverPiso/ErgunTestMPI_cgs/CFD/octave/cfdemSolverPiso_ErgunTestMPI.eps”.

Hello CFDEM Folks,

These are the errors we are finding in simulation of first tutorial. Can Somone help me in this concern ?

trying to start paraview...
./Allrun.sh: line 81: /home/vivek/software/ParaView-4.3.1-Linux-64bit/bin/paraview: No such file or directory

Hi,

When I run the tutorial case, cfdemSolverPiso/periodicChannel, I received the following errors.

May I ask how to solve this issue please?

#####################################################
CFDEMcoupling version: cfdem-3.8.1
, compatible to LIGGGHTS version: 3.8.0
, compatible to OF version and build: 5.x-commit-538044ac05c4672b37c7df607dca1116fa88df88

You are currently using:
OF version: 5.x
OF build: 5.x-538044ac05c4
CFDEM build: 3.8.0-3-gb237264-dirty

I'm writing the command: write_dump all mesh/vtk post/meshfile*.vtk stress vel stresscomponents area

This command worked in previous versions when it was mesh/gran/VTK and I've corrected it to mesh/vtk, but I'm still getting errors with this command that are indicating the keywords are wrong. What is the correct way to do this in version 3.8?

Hello!

I am trying to simulate a tunnel with 4 spheres but one of these spheres comes out of one of the walls of the STL (it does not bounce)
The file is not recognizing my domain as a wall.

Any help would be appreciated

The configuration of the dictionary of the spheres is as follows:
*****************************
echo both
log ../DEM/log.liggghts
thermo_log ../DEM/post/thermo.txt

atom_style granular
atom_modify map array
communicate single vel yes

Dear All

Hey!

I have rewritten the smagorinsky turbulence model to create a sub-grid voidfraction dependent viscosity of the Batchelor-Green viscosity:

https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/artic...

Hello All

I am writing in hope if some one can help me in solving the problem. I want to restart my cfdem simulation from last time step. Due to time limit on cluster, the simulation did not finish till specified time (e.g.3 sec). I am following the same procedure as done in tutorial case ErgunTestMPI_restart. Here is in brief what I do: