CFDEM®coupling - User Forum

Dear all
I want to know is there any way to apply a hydrostatic pressure to stl walls of LIGGGHTS program?
I am working on a coupled cfd-dem model and I need to add the hydrostatic pressure of fluid to stl walls in dem side,
Any help is very appreciated.
Regards,
Talat,

Hi,

I am simulating a fluidized bed column using CFDEM. Few months ago I was solving the problem with the solverIB, using a cylindrical block structured mesh. When I tried to change the solver (to solverPiso), I started having problems to use the same mesh I was using before. The solverPiso works fine when I construct a square-base column. But when I try to use the cylindrical mesh, the solverPiso presents problems. I already double checked the mesh, and since I was already using it to solve the case with the solverIB, I don't think it is bad constructed.

Hello, everyone. I just installed CFDEM on ubuntu 14 according to https://www.cfdem.com/media/CFDEM/docu/CFDEMcoupling_Manual.html#install...
After command 'cfdemCompCFDEMall', I inputted ' cfdemTestTUT' and things went well because I got a picture of a curve. However, when I went back to terminal, I found some words like this:

Hello, could someone help me to understand why boundary condition in phiIB field for the cfdemSolverIB solver uses zerogradient instead of constant zero? I am taking as example the twospheresglow tutorial.
Probably there is a basic answer, but I cannot figure out why.
Thank you in advance.

Best regards,
Paula

Hello everyone,

I am a new CFDEM coupling, please forgive me if I post a stupid question.

After installing CFDEM coupling, I try to run some cases in tutorial. Most of the case show errors:

Finalising parallel run
rm: cannot remove '*.png': No such file or directory
/home/zang/CFDEM/zang-PUBLIC-3.0.x/run/packedBedTemp/parCFDDEMrun.sh: line 45: octave: command not found

and the image viewer say: No images found in 'file:///home/user/CFDEM/user-PUBLIC-3.0.x/run/packedBedTemp/CFD/octave/cfdemSolverPisoSTM_pressureDrop.png'.

Hi,

I'm running a fluidized bed using cfdemsolverIB because my particles are too big (6 mm) for the mesh I need to solve the fluid phase. I have around 30 thousand particles into my system. When I try to run the case with few particles, the simulation doesn't present any problem. However, when I put all the 30 thousand particles into the system, it gives a Fatal Error after few timesteps. The error is:

Hello,
During the installation of CFDEM coupling through step by step method in online documentation, I have faced with some problems.
In this part, "Compile LIGGGHTS® and CFDEM®coupling" from online documentation/installation there are some commands such as:
cfdemCompLIG
cfdemCompCFDEMsrc
cfdemCompCFDEmsol
cfdenCompCFDEMuti

Although I have tried to perform them in terminal, the two last commands were not performed properly. You can see the problem as following:

Dynamical variations on parameters in a CFD-DEM simulation

Hello. I have a question about the installation for Ubuntu.

I'm installing CFDEM®coupling following the documentation(https://www.cfdem.com/media/CFDEM/docu/CFDEMcoupling_Manual.html#install...).

When I set environment variables and paths, I added the STANDARD block to the end of my bashrc.

Hallo,
I have a question regarding the ErgungTestMPI_restart tutorial case of CFDEM.
In in.liggghts_restart the file liggghts.restartCFDEM is read: read_restart ../DEM/post/restart/liggghts.restartCFDEM
Where is this restart file actually generated when running the case? I cannot find any code in in.ligghts_init, in.liggghts_run, ... where this file is written out.
Best
kalei