CFDEM®coupling - User Forum

I am using public version of CFDEM to simulate my case. I took referance from periodicChannel case and modified my case in which inlet and outlet are coupled with cyclic boundary and flow velocity is defined using fvOptions located in CFD/system directory. I find it very strange that in the tutorial case *periodicChannel), I dont get any error and case runs smoothly. In opposite to that I get error for my case that model type meanSupVelocityForce is unvalid and the shows a list of fvOption models available. I wonder why is that.

My fvOptions file has following:

Hi Guys

Please refer to the attached input file. I am getting the below error.
The error is at line 55. I am using a prime number for the generation however the error still occurs.
Can someone please assist?

Hi,

I would hear if it is possible to simulate with particles that are non-spherical? At the moment I have only simulated with particles that are spheres. However, I wondered if it is possible to create cubes to simulate with?

Cheers,
Jeppe

Hi all,

I am trying to figure out what the rho value in the 0 folder indicates. In the "Periodic Channel" tutorial case for "cfdemSolverPiso" the rho value is set to 1.3 kg/m^3, however is this the density of the fluid or the particle (neither seems to be realistic values) ? However, in the "settlingTestMPI" and the "voidfractionTest" tutorial cases for the "cfdemSolverPiso" the rho values is set to 10 kg/m^3.

Maybe one of you can help me solving my confusion about the constant rho.

Cheers,
Jeppe

Hi all,

I tried several times to Set environment variables and paths. However, I got the following error:

cfdemSysTest: command not found

I followed previous steps successfully, but I don't know what is the problem here. Also, I read the solutions provided before for this problem and checked the paths, although none of them works.

I use Ubuntu, and LIGGGHTS and OpenFoam work on my system without any problem. Please help me in this regard.

Hi everyone

I am running simulations of a pressure driven suspension flow through a micro channel, investigating particles sized of 1 micron and below in diameter. Because of the size of the particles I am required to use the 'micro' unit system within LIGGGHTS.

In order to get the correct units within OpenFOAM I have adjusted both the units in the constant '0' folder and also added in the similar details from the "ErgunTestMPI_cgs" tutorial case to the controldict file but converted to match the LIGGGHTs micro scale.

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