CFDEM®coupling - User Forum

I simulate the bubbles move up in the water where bubbles are regarded as the discrete phase. In the default solver, the p field is not include gravity effect. Now I add gravity effect in the p formulation and compile the solver. When I run the simulation wihout drag force, I think the gradP force works fine, but if I add the drag force, bubbles don't move up and their movement become out of order. I don't kown what is wrong with it, It's the solver problem or wrong initial conditions or any other problem?anther problem is that some bubbles can cross the draft tube wall.

Hello CFDEM Users,

I tried to install CFDEM on Ubuntu machine. After installing, I didn't manage to run the tutorials. So, I tried to run the following example :
~/CFDEM/CFDEMcoupling-PUBLIC-2.1.0/tutorials/cfdemSolverPiso/settlingTestMPI/CFD

using the command :
mpirun -np 2 cfdemSolverPiso -parallel

and I found the follwoing error :

--> FOAM FATAL ERROR:
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

Hi everyone,

I am just coming back with a new equiry on CFDEM coupling.

Hi,

I am trying to update from CFDEM 2.4.4 to CFDEM 2.5.0, but I get error while compiling cfdemSolverIB as shown below. I think some library is missing in ../cfdemSolverIB/Make/options. Any ideas? Version 2.4.4 had compiled fine. I have attached the log file.

Hello everyone,
I am trying to install CFDEM followed by the githubAccess_Public.pdf. It all runs fine. The "cfdemSysTest" also shows no errors. However, when I compiled "cfdemCompLIG", then the computer goes dead. Is there anyone meet this situation and knowing how to modify it? Thanks.

when I simulate the bubbles move up in the water, the gradp forcemodel does not work fine. The bubbles' velocity is too big, though the drag forcemodel is included. Another problem is bubbles. may fall down in the end of the iteration.

the gradp forcemodel can be weather used to simulate the buoyant effect?

Hi,

1. I was able to install cfdem packages along with LIGGGHTS and OpenFOAM 2.1.x. I had no issues during the installation.

2. I was able to run the cfdemSolverIB tutorial. However, I had the following errors running the EurgentestMPI.

Reading momentum exchange field Ksl

Reading voidfraction field voidfraction = (Vgas/Vparticle)

Creating dummy density field rho

Reading particle velocity field Us

Reading/calculating face flux field phi

Hi dears ,Just a simple question ,

Can LIGGGHTS DEM code can easily be coupled by commercial codes like ANSYS FLUENT ?

Regards
Mohammad

Hello,

Using Lammps, I have understood the dynamics of a chain of beads which are connected to each other, considering the interaction potential between the beads (Lennard-Jones potential + Nonlinear spring potential).
Further, I have developed solvers to implement the ion transport using continuum based models in OpenFOAM. Now, I would like to couple both these solvers.

I have installed CFDEM per the procedure given in pdf "githubAccess_public". My problem is when I run any examples following error appears: