CFDEM®coupling - User Forum

Dear all,

Is there a chance to use paraview to visualize particles' trajectories in time?

Thanks,
Mohsen

Dear all,

I have a solid body within pipe flow and I am interested in determining the lift and drag coefficient of the solid body. These coefficients are determined using the drag and lift forces, so actually I want to determine those!

As a solver I use the IBcfdemsolver (as I include big particles).

Hi Everyone,

Does anybody have some references for the added mass coeffient in the gradP and viscous force models?

Or is this left over from the versions which did not include a separate virtual mass force model?

Regards

Victor

Hi Everyone,

Could someone tell me how I can set the particleCloud_.cg value for an entire simulation?

Thanks,

Victor

Hello to everyone.
I have been trying to modify the twoSpheresGlowinski tutorial from CFDEM in order to simulate a coupled flow (sedimentation) of particles (~400μm diameter) into a non Newtonian fluid.
My main problem seams to be that no cells are selected to be refined and Courant number increases as the steps progress.
These is the log output of the 7th step where it cruses.

Selected 0 cells for refinement out of 8000.
Selected 0 split points out of a possible 0.
Courant Number mean: 1.78356e+41 max: 2.46448e+43

What do I have to change???

Dear all,

I have some doubt about how to set the "KochHillDrag" model.
My case treats a cloud of solid particles that flows through a high viscosity liquid.
I found that the simulation blows up due to the drag force values, which arise almost immediately.
On the other side I found that, setting the "scaleDrag" parameter to a value much lower than 1 (between 0.3 and 0.5),
the simulation becomes stable and runs well.

Hello!

Hello All,

I was wondering where I can get examples for liggghts version 3.30. Examples in the following link are not working:
https://github.com/CFDEMproject/LIGGGHTS-PUBLIC/tree/master/examples/LIG....

thanks for your help

Hi all!

I want to simulate a case in which I just want to consider temperature coupling between fluid and particles using LaEuScalarTemp. Is there a possibility to switch off the calculation of forces and momentum exchange completely?

Dear all,

I would like to submit to your attention an annoying problem I am not not able to solve.