CFDEM®coupling - User Forum

I have tried to create a simple pipe case with a pipe and adding wear to the walls.

The case runs fine up to 0.03s and then stalls for a long time and then crashes.

I cannot find out what the problem is.
Tried adjusting almost everything I think is relevant, but no luck.

Starting guess comes from a steady-state flow solution.

If one of the experts would kindly take a look at the case provided here I would be most grateful.

Dear there,

I'm new to Linux and it takes me a lot time try to install CFDEMcoupling.
In the past 1 month, I tried to install CFDEMcoupling, no succeed and now I'm really frustrated.
Can anyone here give me an hand please?

What I've done is
1. Install Ubuntu 12.04 64bit
2. Install OpenFOAM-2.2.x following the procedure (Repository version), tested, ok
3. Install CFDEMcoupling following the PDF, cfdemCompLIG-ok, cfdemCompCFDEM-error

Hello everyone,

I have a problem about the document of LiggghtsCommands in the constant folder. I can search the liggghtsCommandModels and execute files from the CFDEM folder or liggghts one. But I cannot get any clue about "set","total","noBlanks", "slash" in executeProps 1. Are they the command from the ubuntu system? or or opencode? any comments will be appreciated. thanks in advanced.

yyu

Hi Christoph,

I am testing a simple CFD-DEM case of cyclone separator using cfdemSolverPiso. Before doing the coupling of CFD-DEM, CFD and DEM simulation were tested separately and worked fine. However, when performing CFD-DEM coupling, it seems that the same command " fix insert/stream " in DEM does not work with cfdemPisoSolver.

CFD test:

DEM test:

Hi!!

I have a problem when using "reconstructPar" in cfdem coupling
My versions are:
CFDEMcoupling version: cfdem-2.5.5
LIGGGHTS version : 2.3.6
OF version: 2.2.0
O.S : Version 12.04 (precise) 64 bits
Cores : Intel® Xeon(R) CPU E5620 @ 2.40GHz × 8

the error message is as follows:
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Reconstructing point fields

No point fields

Reconstructing lagrangian fields for cloud particleCloud

Hi I am a regular user of CFDEM softwares OpnFOAM and LIGGGHTS.
I want to simulate channel flow for which I am coupling channel flow tutorial in openfoam with liggghts ( after modifying some parameters)
I am getting following error which I don't understand why.

Create time

Create mesh for time = 0

Reading field p

Reading physical velocity field U
Note: only if voidfraction at boundary is 1, U is superficial velocity!!!

Reading momentum exchange field Ksl

Reading voidfraction field voidfraction = (Vgas/Vparticle)

Hi All,

A PhD student is needed in the area of coupling of computational fluid
mechanics and discrete element method on particle movement, heating, liquid spray,
coating and film. Support includes salary, tuition, health insurance, etc. Interested parties should send a complete resume to Dr. Haifang Wen (Haifang_wen@wsu.edu)

Thanks!

Kun

Hi readers:

I made a clean install on openSUSE 12.3 managed to compile without errors for OpenFOAM and LIGGGHTS but many times a try after I execute cfdemCompCFDEM I have at the end (shown as snipped below):

Hi!
I have a little trouble with the command "bond_type harmonic"
if I use this command (bond_type harmonic) under LIGGGHTS works without any problem,
when cfdem coupling, I got this message:
"
Courant Number mean: 0.00147829 max: 7.37258
Starting up LIGGGHTS
Executing command: 'run 10 pre no post no'
run 10 pre no post no
Step Atoms KinEng 1 Volume
91101 61 0.18215281 0.00059623725 0.00011248163
ERROR on proc 7: Bond atoms 53 54 missing on proc 7 at step 91104 (neigh_bond.cpp:60)
"

Hi all,