CFDEM®coupling - User Forum

Dear DCS team,

I hope I am using a right version of CFDEM 3.0 Manual, but I cannot find out the description for several newly added models such as field time average model; volume weighted average model... I just want to quickly understand how these new model work in CFDEM3.0.

Thanks,

Dear all,
I am simulating the movment of two multi_sphere particles. my simulation run successfully but after I reinstalled CFDEM again, It does not work for my case and this error happens after finishing some time step. ( I did not change any thing atall)

Dear all,

When I simulate particle interactions in a flow field, the Courant number blows up during collision and, therefore, in combination with the error "Atom sorting has bin size = 0.0", my simulation stops!

Any tips on where to pay attention on when simulating particle interactions (within a fluid flow field) in CFDEM?

Thank you in advance.

Kind regards,

Boris

How can I insert micro level particles in shear cell example given in the tutorial. What are the modifications to be made in the syntax? We have tried volume limit.

Is it possible to output the data as shown below about time taken by different routines of DEM while running a CFD-DEM simulation?

Hi, everyone

I am having this problem with the servo wall, the particles are crossing the wall like if it was not there. I attached a picture to illustrate the problem, and also the log file. I basically modified the example on cfdemSolverPisoScalar with a smaller box and particles, and fluid flow in the x-direction.

The code works on LIGGGHTS but I don't know if I need any specific modification for CFDEM.
I really appreciate any help you can provide,
Livio

Hello all,

I have simulated heat transfer in a granular assembly in LIGGGHTS.
I have also simulated a flow field separately in OpenFOAM

However, when I run both of them using cfdemSolverPisoScalar, I seem to be getting only LIGGGHTS output. Is this because of the run time or the time step, or is there more to it?

Regards,
Joel

Dear all,

I want to use fix massflow/mesh to delete a certain type of particles passing a stl surface in CFD-DEM coupling. I use group to define the group-ID.

The problem is the group command does not work and fix massflow/mesh deletes all particles. Is it possible to dynamics group particle in CFD-DEM? Or it is my setting problem.

Thank you for any help.

Regards,

Hi all,

I'm trying to compile CFDEM on CentOS 7 (in an OpenNebula VM).

I've compiled OF 30x and LIGGGHTs from source and they are working.

I'm using additionalLibs_30x and I've adapted the OFversion.H file

Error appears to be due to mpi version / location.

MPI is load though module load, which is load through ~/.bashrc ("module load mpi/openmpi-x86_64").

I think I have to adapt the makefile for the mpi locations and libs. Any tips on this?

Dear all,
is it possible to calculate the motion of an elliptic particle? When I run a simulation in liggghts with atom_style ellipsoid an pair_style gayberne everything works fine, but in cfdem I get the error message "Invalid pair style".

Best regards