CFDEM®coupling - User Forum

Dear All,

I am trying to "put together" automatically all the "processor" folders (from "processor 0" to "processor 576" in /home/....../CFD) in order to have just one folder to open in Paraview and see all my simulation data together....... I am following the instructions of Paul (Wed, 03/14/2018 - 12:57) from a previous post: https://www.cfdem.com/forums/paraview-visualization-hpc-simulation-modif...

Which means trying to use:

Hello, Ive been working on a very simple case that I intend to use to measure the angle of repose of a particle heap. The simulation runs fine, however, I cant get the coupling to work for the particle insertion/settling, its only using LIGGGHTS for it, which I think might influence the initial height of the heap (before the stopper is pulled). Once the stopper is removed and the heap starts collapsing, the coupling kicks in. Ive attached the case if its any help.
Thanks in advance

Hi,

I would like to know what is the preferred density ratio for particle and fluid for the cfdemSolverIB. Can I use particles which have the same density or lighter than the surrounding fluid?

Thank you.

Raihan

Hi CFDEM users,

Hi all,

does anybody did actually use the noDataExchange switch? In my cases the simulation crashes (complaining about setCG()) ?!
Best Regards
Stephan

Hi

i'm currently trying to extend a working DEM-simulation with CFD.
The setting is like this: particles get moved trough a chute and a conveyor belt via DEM and end in a pipe where they should get sucked off via CFD. From what i‘ve understood by now, i need a mesh of the enviroment to get the CFD-part working. My question here is: do i need to mesh the whole enviroment or only the pipe where the particles get sucked off? When i only need the pipe, does it have to be closed on the ends?

Hi,
when I generate the region to initialize particles, I found that we should import the geometry and mesh in the dem settings and not use the openfoam geometry/mesh automotively. May I ask if they are relative independent mesh system in the simulation? is this possible to use two different set of geometry/mesh set for the DEM maybe should be in the fluid domain defined in openfoam?

Regards,
Dan

Dear all,

finally I managed installing OF 5.x on the CentOS machine.
Then I tried to install CFDEMCoupling the following way:


cd $HOME
mkdir CFDEM
cd CFDEM
git clone git://github.com/CFDEMproject/CFDEMcoupling-PUBLIC.git
cd $HOME
mkdir LIGGGHTS
cd LIGGGHTS
git clone git://github.com/CFDEMproject/LIGGGHTS-PUBLIC.git
git clone git://github.com/CFDEMproject/LPP.git lpp


renaming

Hi Alice and Josef,

Please kindly advise my case on Ubuntu14.04. I have been using CFDEM3x for a long time, the compilation is always fine. I recently want to upgrade to CFDEM3.8 which has several new features useful to me. I installed OpenFOAM5x and LIGGGHTS3.8 without any problem. All run well. But when compiling CFDEM (cfdemCompCFDEMsrc), the following errors come:

Hi all,

I want to ask is there any method to simulate the free-surface of water using CFDEM coupling? For example, I want to simulate the process of a single particle settling into water from the air. Is there any possibility that we simulate the fluid wave around the surface of the water?

Furthermore, would it be possible that we simulate the interaction between solid, air and water?

Any suggestions are greatly appreciated.

Best,
Rachel