CFDEM®coupling - User Forum

I had taken a break from the CFD-DEM until this last week. I installed the latest version of LIGGGHTS and CFDEMCOUPLING and when I run my (updated) input scripts, I get crazy errors when I from temperature on any walls. The first try was with primitive Hertzian walls. I tried again with a mesh and still got errors that kill the simulation.

Dear all,

I am trying to compile OpenFOAM-2.1.x with LIGGGHTS 2.3.6 under CFDEMcoupling-PUBLIC-2.1.x in ubuntu 10.04 LTS (Lucid).
Both OpenFOAM and LIGGGHTS are running fine individually and the cfdemCompLIG command was done. But something went wrong when I tried to do the cfdemCompCFDEM command. Here are the error messages when compiling the solver:

Hi everyone,

A simple question.
Is gravity term of fluid included in cfdemSolverPiso?
Thanks.

Fengxian

Hello CFDEMers,

I have made an attempt to create a new solver based on cfdemSolverPiso. The idea is to include a simple convection diffusion equation of a scalar "W" in this case. The equation added to the new solver, called cfdemSolverPisoMT, looks as follows:

turbulence->correct();

fvScalarMatrix WEqn
(
fvm::ddt(W)
+ fvm::div(phi, W)
- fvm::laplacian(Di, W)
);

WEqn.solve();

runTime.write();

Hi,

I have recenely installed OF2.1.1,LIGGGHTS-PUBLIC 3.0.0 and cfdem-2.6.1
following the instruction on the CFDEM project website. I didn't see any
error during the installation but I am getting error when I try to run the test examples
using cfdemTestTUT or Allrun.sh from the directories. So far, I was able to run
the SettlingTestMPI example only but I get error from the other examples.

Helloeveryone,
There is an error for my test during coupling stage as follows,
[0] --> FOAM FATAL ERROR:
[0] [1]
[1]
[1] --> FOAM FATAL ERROR:
[1] incompatible dimensions for operation
[U[1 -2 -2 0 0 0 0] ] + [U[0 1 -2 0 0 0 0] ]
[1]
[1] From function checkMethod(const fvMatrix&, const fvMatrix&)
[1] in file /opt/openfoam211/src/finiteVolume/lnInclude/fvMatrix.C at line incompatible dimensions for operation
[U[1 -2 -2 0 0 0 0] ] + [U[0 1 -2 0 0 0 0] ]
[0]

What is this? (screenshot) Is it spam? It's a bunch of random categories with no posts. And the overlap with the right-hand column is strange too.
This needs to be cleaned up.

Hello everyone,

Is there any command could use to add or decrease fluid in some region during the simulation? I saw there is a file named setFields. I have changed the region in the file , however, the pressure does not change for the changing of hydrostatic pressure related to fluid head. Is there something wrong used for calculating hydrostatic pressure?
Thanks,
shokeyi

Hi everybody,

as I am still a rookie using CFDEM perhaps your could give me some advices basing on your experience.

Recently I downloaded and installed the LIGGGHTS and CFDEMcoupling packages as described in the installation manual. Everything seemed to work fine.

Using "cfdemSysTest" tells me that

valid:NO critical:no - $CFDEM_PIZZA_DIR = /home/dorn/LIGGGHTS/PIZZA/gran_pizza_17Aug10/src does not exist

the specification of paths of Pizza is not correct. --> What to do in that case?

I have installed CFDEM and run some cases successfully.

In order to save computational time, I like to run Liggghts first to get the initial position of particles and then use the results as restart file for CFDEM calculation.

Does anyone can tell me how to run Liggghts separately ? The command Liggghts does not work.

Many thanks

Peter