CFDEM®coupling - User Forum

Dear all,

When I applied cfdemPisoSolver in my simulation, I found there is no interaction between stl mesh wall in liggghts part and water in openFoam part. Now, I am wondering whether there exist a method to define the contact betwwen water and walls?

In other words, if I want to simulation a similar problem about the drop process of a container full of water, how to define the interaction between water and the container? Is there any method? Any suggersions or clues are appreciated!

Best regards,
Rachel

Hi,
Is there any way to calculate and output the total particle/wall heat flux due to the conduction through contacts areas and conduction/convection through the gas?

Thanks

Simone

Dear all,

I want to ask a question. As I see in this forum, the mesh size of OpenFOAM should be 3-4 times of the particles diameter. If I have some kinds of particles with different diameters such as 1mm, 0.5mm, 0.1mm. Should my mesh size be 3-4 times of the diameters of the larger particles or the smaller particles? Thank you very much.

Besr regards,
Rachel

Dear all,

Dear all,

I am using Model A with following code lines, where implicit method is used. For the fluid force on a particle (Fpf), there are mainly three kinds of components, fd, f_pg (pressure gradient force), f_v (viscous force).

1) what is the true meaning of f_dragforce, does it only referee to the pressure gradient force f_pg + viscous force f_v, namely (Fpf-fd) ?

2) If f_cfd2 is the sum of Fpf for all particles, why I find f_cfd2 < sum (f_dragfroce) << pressure drop * area? The case with cylindrical bed is used.

Hi everyone,

I am simulating the pressure drop caused by a compressed bed of packed particles. On the DEM-side I mechanically compressed particles with a moving mesh. I then used this state to create the restart data where I changed the STL for a wall. On the CFDEM-side I apply a velocity of 0.001 in the inlet. I am using cfdemSolverPiso.

hello
I just installed the CFDEM according to the website but I have no idea where can I get the guide about how to run this simulation especially the post procession. I only got some pic and I want to see the result on the Paraview , so I'd like to know how to use it. videos pdf URLs anything is fine
Thanks

Any can help me?

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* C F D E M (R) c o u p l i n g *
* *
* by DCS Computing GmbH *
* www.dcs-computing.com *
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CFDEM(R)coupling system settings:
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CFDEM_VERSION=PUBLIC
couple to OF_VERSION=3.0.x
compile option=Opt

Hi everyone,

is there an analogous python wrapper to the CFDEM coupling as there is to only-liggghts?

Hallo,
I am doing a coupled CFDEM simulation with gas and particle flow. However I have the problem, that after the insertion of about 1000 particles my simulation significantly slows down. What can be the origin of this effect and how might this be prevented?
Best
Karl-Heinz