CFDEM®coupling - User Forum

Dear CFDEM developers,

I am aware that the fluid property in the CFDEM coupling is constant and defined in ../constant/transportProperties.
Is there any possibility for us to make the fluid properties vary during the interaction process with the particle system? For example, the fluid density becomes larger and larger in the flowing process.

Many thanks for your attention.
Best regards,
Moon

Dear all,
I am simulating interaction of particle and fluid using CFDEMSOlverIB, but it stops here:
Time = 0.002
Selected 391658 cells for refinement out of 430289.
Refined from 430289 to 3171895 cells.
Selected 0 split points out of a possible 391658.
Courant Number mean: 92329.5 max: 7.85258e+09
- evolve()
timeStepFraction() = 1
Starting up LIGGGHTS
Step Atoms KinEng rke Volume
Executing command: 'run 100 pre no post no'
Step Atoms KinEng rke Volume
40101 8844 1.328017 0.069717623 0.000132651

Dear all,
I am trying to simulate a sand and water coupling case with the immersed boundary, when i start with CFDEMSolverIB and set momCoupleModels to be off. It tells me:
update Ksl.internalField()
[0] [1]
[1]
[1] --> FOAM FATAL ERROR: [2]
[2]
[2] --> FOAM FATAL ERROR:
[2] the solver calls for impMomSource()
, please set 'momCoupleModel' to type 'implicitCouple'
[2]
[2]
FOAM parallel run aborting

Hello,
I'm trying to start the packedBedTemp tutorial. But all I get is an error. Maybe some one can help me.
I'm peaty new with CFDEM so the many warnings are not saying me anything, but I believe the interesting part may be this one:

// run_parallel_cfdemSolverPisoScalar_packedBedTemp_CFDDEM //

/home/robert/CFDEM/CFDEMcoupling-PUBLIC-2.3.x/tutorials/cfdemSolverPisoScalar/packedBedTemp/CFD

Hello guys,

I have been having troubles to compile CFDEM in m y computer. I have worked with OpenFOAM for a couple of years, so my OF installation is fine. However, compiling CFDEM doesn't work. I don't know if some libraries are not well adressed or something. (My OF version is 2.3.)
When I compile CFDEM I get the next errors:

Could any one help me I did all what I can to get it installed
but I did not succeed

LIGGGHTS works very well
OpenFoam or foam-extend-3.1 very well also

But no way to get CFDEM-Coupling be installed

I'm missing some thing for sure but cant tell

Any help will be great in order to make a decision to continue or drop this and try other things

At the stage where I'm know in trying to understanding the mechanics of LIGGGHTS and OpenFoam interplay

I'm not able to know why I'm having those errors

Hi!

I recently started using CFDEMSolverPiso and I noticed something about the implementation of the fluid pressure gradient.

In gradPForce.C the gradient is calculated explicitly, followed by a cellPoint interpolation to the particle position (if interpolation is turned on), however, this gradient is calculated according to the logic of OpenFOAM (Gauss linear interpolation) which means:

if we have a pressure like this:
0 | 0 | 100 | 0 | 0

we obtain a gradient like this:
0 | 50 | 0 | -50 | 0

Hi all,

There are several differences between CFDEM2.90 and CFDEM2.7.1 that caused significant changes in results of my simulation. The solverPiso codes have some important differences, particularly

in 2.7.1:

Dear all, for the CFDEM now, can we consider the Basset history force for the particles now?

Thank you so much!

Detian

Hello all,

I am trying to study how the fluid flow velocity could influence (decrease) the temperature of particles.

I found some information about particle-particle and fluid-particle heat transfer but in my case I disregard the temperature of fluid. I only need the flow velocity as a parameter and how this parameter could change the temperature of the particle, I also need this parameter in the future for other purposes.