CFDEM®coupling - User Forum

Following the tutorial example, but the pressure drop didn't increase/decrease significantly (only 1 unit or less ) with the increase/decrease inlet velocity (0.01/0.1m/s). I know that the pressure is divided by rho, with a unit of m2/s2.
Could anyone give me idea why this happens?

Hello everybody,

I have just recently installed LIGGGHTS and CFDEM. I successfully run the available tutorial cases using both "cfdemTestTUT" and "./Allrun.sh" commands, it gave me some graphs and lists of numbers as a results.

But I still not sure how to present the results using paraview. Are all the available tutorial cases can be presented using paraview or only some of them?

I used paraview with Liggghts before and I also re-installed it with OPENFOAM again but I do not know if I need to set new alias again here to run these tutorials ?

Hi everybody,

I am a really new guy in Linux (Ubuntu) and coding as well. I have tried to compile CFDEM for my study for more than 2 months recently however it is really a tough job. I always get stucked on cfdemCompCFDEM step though I think I had followed strictly the instruction. After several removing and installing efforts, I decided to post my problem here and hope a support from some specialists here.

The result from cfdemSysTest is listed below (seems to be a perfect condition):

Hi ALL ! I was just wondering if some of you could help me out? Basically I want to run CFDEM on a cluster (runs on CentOS, I do not have root permission). OpenFoam finnaly runs. Trying to install CFDEM It took me a while to realize that I need to change the paths in the . bashrc file. However, when I do the cfdemSysTest I get something that open mpi is not there "The Open MPI wrapper compiler was unable to find the specified compiler
no in your PATH" ??? What am I doing wrong and ideas ??? Do I need to add something to the bashrc again ??? THANK YOU !!!

Hi everyone,

After using CFDEMcoupling for a while,
i'm curious
whether the DEMforce_ passed to DEM is added to particles (for pure DEM collision calculation) for only one DEM step or all steps during coupling interval (with the same value)?

best regards,
Mq

Hi
I study the CFDEM coupling by reading Manual.pdf, i find "tutorial cases " in Manual,but i can't find. I also see some examples and application on the website,but i cannot find the script or introduction about it, who can provide me some introduction or script. Thanks!
regards!
Tang

Hello everybody,

I'm not an experienced user with Ubuntu nor any related OS. Even though, I've been able to successfully install OpenFOAM 2.3.x with ThirdParty 2.3.x in my laptop (OS Ubuntu 14.04 LTS) and I've been trying to install LIGGGHTS & CFDEM, unsucessfully. I've been following the guide that's available in this website.

I'm quite sure that the OF installation process went fine because any error has been displayed so far and I was able to do a tutorial. The problem appears when I try to compile both programs (LIGGGHTS & CFDEM).

Hello All,

I am writing a code for compressible CFDEM, and now I am on the turbulence part, normally voidfraction is accounted for even in turbulence equations (for example in the k-epsilon equation) but clearly openFoam does not. So my question is do cfdem solvers account for the void fraction correction or not?

thanks as always for your help and patience,

Hello Dear all
I need to write the solver for coupling interFoam and liggghts. Can I replace the CFD files of cfdemSolverPiso with the files of interfoam solver and change the code of cfdemSolverPiso?
Please let me know the stages of writing new solver.

Thanks
Elham

Hi !!

I successfully ran two tutorial cases (erguntestMPI and settlingtestmpi); the coupling works flawlessly!! However, I encountered the following errors when I ran the packedbedtemp and twospheresglowinski tutorial:

For the cfdemsolverpisoscalar - packedbedtemp: