CFDEM®coupling - User Forum

Hi all,

I have been trying to implement a case similar to the packedBedTemp cfdemSolverPisoScalar example case where hot particles are cooled by a flowing continuous phase. For my case I will not know the temperature of the particles, but instead the power (in Watts) of each particle so I am thinking I will need to use the heatSource model instead of the Temperature model within heat/gran. I have read the brief discussion of it in the user manual, but I am having trouble replicating results I have gotten through commercial codes.

Hi guys,

Hi, guys.

There is a problem restarting the liggghts file.

Specifically, I can not restart my simulation about the latest time using the file "DEM/post/restart/liggghts.restartCFDEM" after my computer suddenly turned off.

This is the second case.

First, the restartCFDEM file exists but the file size is 0KB.

The second file exists normally. However, if I execute "parCFDDEMrun.sh", it will not proceed in the step of reading the restart file as below.

Dear All,

Has anyone successfully installed CFDEM®coupling (version 3.7.0 or 3.8.0) on macOS 10.13 High Sierra, or on macOS 10.14 Mojave ?

Does CFDEM®coupling work correctly on the latest releases of macOS ? Any comment ?

Regards,
Limone

Hi All,
I have tried to adapt a case that I had running using the solver cfdemSolverPiso to add heating to the particles and run it with cfdemSolverPisoScalar. I made sure that everything looks correct from looking at the packedBedTemp example case. When I run the simulation I get the following error message:
Selecting locateModel engine

[0] --> FOAM FATAL IO ERROR:
[0] keyword engineProps is undefined in dictionary "/home/robert/CFDEM/robert-PUBLIC-4.x/run/PREXpolyhedraLaminarH2OScalar/CFD/processor0/constant/couplingProperties"
[0]

Dear All,

What force model does the cfdemSolverPISO use when it applied into the multi-size particle cfdem coupling system? Is it accurate enough? Any validation test has been done before?

Thanks

Dear all,

I run the cfdemsolverpiso tutorial case for fluid flow through a particle bed, however, I found that the generated image picture showed a big difference between the analytical ergun pressure drop and the simulation results. especially before the bed was fluidization. While the velocity was smaller than the minimal velocity, the simulated pressure drop was much larger than the analytical one? Can anyone help me explain this?

Thanks

Hello everyone:

when I want to compile PVReader with Paraview, I meet a problem. I don't know why? Can anybody help me?

Hi:

i just meet a problem when i want to install Paraview 5.4.0 through ThirdParty-5.x ,
my step: cd OpenFOAM
cd ThirdParty-5.x
./makeParaView

and there comes the download failed. do somebody knows what's the problem?

Downloading ParaView-5.4.0
./makeParaView: 112: ./makeParaView: curl: not found
Download unsuccessful
ParaView download failed. Re-run to retry download

Hi all,

I am simulating a case using CFD-DEM coupling package. I have successfully used "liggghtsCommands" in my CFD\constant folder and I can delete atoms in a certain region every coupling step. However, I don't expect the atoms are deleted every coupling step and I want to delete the atom every 1000 coupling step, how can I control the frequency of the liggghtscommand?