CFDEM®coupling - User Forum

hello all,
i tried to run hopperemptying example of cfdem but it stooped with an error:

anoop@ubuntu:~/OpenFOAM/anoop-2.0.x/run/cfdemSolverPiso_shared/HopperEmptying/DEM$ liggghts < in.liggghts_init
LIGGGHTS 1.4.5 based on lammps-10Mar10
Created orthogonal box = (0 -0.006 -0.08) to (0.3 0 0.5)
ERROR: Bad grid of processors

what does it mean??
i changed processors to * * * but error is still same.
thanks for any further reply.

Anoop

HI,
Plz put swak4foam in direct downloads as im unable to download it via svn or git due to proxy limitations.

thnx

hi all,
Im working on gas-solid fluidized bed simulation. im new on cfdem. i have run the same problm openfoam (euler-euler approach). now im moving towards eulerian-lagrangian method. my problem is that i have seen cfdem example cases and have run settlingtestmpi. for gas-solid fluidized bed i have to pack bed upto some length with solid particles. in openfoam i did this with setfieldsdict but here setfields command is not working.
>> Is funkysetfields command related to this and does the same thing??
>> what is the meaning of voidfractionprev and voidfractionnext??

Dear all

I'm learning CFDEM. I started by analyzing the settling example. Then I modified this case more and more. At the beginning it seemed to work well. Any questions I tried to answer with the LAMMPS documentation and this forum. But now I'm standing in front of a big wall. My main problems are:

1) wall material in DEM: in the documentation i just found that the last number determines the wall material.
e.g.: fix xwalls all wall/gran/hooke 1 0 xplane 0 0.01 1
What kind of wall-types can I use? Where are they specified? How can I modify them?

hello sir,

I am new on liggghts and cfdem. i have installed liggghts and cfdem and its coupling with openfoam as per instructions given on this website. Now i want to simulate liggghts test cases. i made liggghts on ubuntu-10.04 LTS within src directory with these commands:
make clean-all
make fedora_fpic (i omitted -j)
make makelib
make -f Makefile.lib fedora_fpic

by this i found an executable lmp_fedora_fpic and Obj_fedora_fpic folder.

for example case run i entered these commands in terminal:
cd LIGGGHTS/liggghts_GIT/examples/LIGGGHTS/packing

sir,
plz suggest me the proper commands to run settlingtestmpi dem case of cfdem examples. how to convert output data in vtk format with pizza?

hi everyone,

Hi

I am running a coupled simulation with cfdemSolverPiso_shared. My model runs fine when only run on 2 processors. I want to see if I can speed up the run, and so have tried running it on 4 processors. However, my simulation crashes at the first CFD timestep (LIGGGHTS initialises fine, and inserts the correct amount of particles) and produces this error:

Starting time loop

Time = 0.0001

[0] #0 Foam::error::printStack(Foam::Ostream&) in "/home/cerecam/OpenFOAM/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"

Hello

I've installed CFDEM with OF-2.0.x as described in the installation-guide from CFDEM. But at the end i tried to run the cfdem testcase. The Allrun.sh script didn't run well. I could not visualize the results in paraview. I'm a bit experienced with OpenFOAM and there it works well with the ParaViewer.
My first question: is there something wrong with the Allrun.sh shellscript?

I also tried to run the case without Allrun.sh (cf CFD, decomposePar, ...). But this workflow also failed. When I run pizza I get the message:
error on line 1 of file ./pizzaScriptInit

hi everyone,
i am new on cfdem. i have jst installed cfdem with openfoam and liggghts coupling. is there any manual so that i may learn step by step commands for running cfdem over gas-solid fluidized bed.
thnx