CFDEM®coupling - User Forum

Hi cfdemers,

I modified ErgunTestMPI case to my numerical setup. I only changed the geometry in polymesh and boundary conditions in 0.
But I found the command fix couple/cfd is needed.

Could anyone tell me when this command is needed and where I can specify it?

Thanks.

rq

Hi,

Does anyone know where I can specify the LIGGGHTS is reading from in.liggghts_init or in.liggghts_resume?

update: I found the answer. It's in CFD/counstant/couplingProperties

Thanks.

rq

I have been trying to compile CFDEM for some time now but I just can't seem to get it to compile. I am working on a Scientific Linus 6.3 system and following the instructions from this site in the CFD-DEM>Downloads page. OpenFOAM 2.1, ParaView 3.12, and LIGGGHTS current git clone all compile without errors. OpenFOAM and paraView test out correctly. Executing the cfdemCompCFDEM command leads to this error:

...POSIX/lnInclude -fPIC -c $SOURCE -o Make/linux64GccDPOpt/readLiggghtsData.o
/usr/bin/ld: cannot find -lmpi_cxx
collect2: ld returned 1 exit status

Both OpenFoam and LIGGGHTS is installed and run OK.
When I compile CFDEM by using 'cfdemCompCFDEM', I get a error which I shown as below.

2012/11/17 Updated +1

cgoniva‘s reply in some topics hint me to re-compile Liggghts by using cfdemComLig again, then the problems solved.

Thanks again.

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2012/11/07 Update:
The problems refer to MPL_XXX is solved.
However, there is another problem as shown below.

Hi CFDEMers,

I am working on CFDEM in high performance clusters. Every time I have to spend days to update or reinstall cfdem package. Can anybody suggest a solution to install openfoam and cfdem without root access?

Thanks.

rq

Hi, everybody

I am trying to modify the tutorial to simulate the segregation of particles with different sizes. I tried a simple problem, a block with 90X90X1000, I poured a group particles with a diameter of 0.003 mm from z=0 to 350 mm, and then the other group with a diameter of 0.005 mm from z=350 to 700 mm. The result looks like that the larger particles can not fall down beneath z=350 to mix with the smaller particles, so do the small particles. Could somebody help me to solve this problem? What is the mistake i did in this case?

Thanks a lot!

Zhen Li

Hi everybody

I am trying to run the CFDEM coupling tutorials. However, I couldn't have made it for an unknown reason. Please tell me if you have any recommendation.

At the end of the terminal, I always get the same error:

(gnome-terminal:3075): Vte-2.90-WARNING **: No se pueden convertir caracteres de UTF-8 a actual.
Unhandled value type TerminalEncoding of pspec encoding

This error indicates that the characters can not be converted from UTF-8 to the current format.

Hi , I have made some changes and compiled a new solver based on version 1.7.x of CFDEM and OpenFoam. now I need to make LIGGGHTS again and include some of the optional packages ( Kspace,..) for DLVO forces. however, I see that instructions have changed and versions are different now. since my solver is only compatible with old version, I will appreciate if you provide me with the txt file that had instructions on compiling LIGGGHTS and CFDEM 1.7.x, so that I can compile my solver again.

Thanks,
Vajiheh

Dear all,

I do not recommend doing the installation as super user, as then the "std. user" might not be able to execute the solvers.

Cheers,
Chris

Hi Chris,

Today I installed OpenFOAM 2.1.1 and the latest LIGGGHTS 2.1.2 on my Laptop with the fresh installed Ubuntu 12.04 system, both worked perfectly.

When i came into compiling CFDEMcouling, the error information about "could not open file RASModel.H" appeared again.

---------------------
...........
could not open file RASModel.H for source file cfdemCloud/cfdemCloud.C
could not open file omp.h for source file cfdemCloud/cfdemCloud.C
could not open file openmpi/ompi/mpi/cxx/mpicxx.h for source file cfdemCloud/cfdemCloud.C