Dear all
I want to run a CFDEM program. my DEM part is already developed. but I don't know how to set inputs for CFD. I mean I don't know how to specify "k", "epsilon", "nut", "voidfraction" and other inputs allocated values, also i dont know how to set fvScheme and fvSolution.
my case is like a semi static problem, I am modeling "3D triaxial test" in soil mechanics. my media is full of soil grains and saturated with water.
and I think the case has laminar flow.
I would appreciate it, if some body could tell me which of cfdem tutorial cases is partially similar to my case or if some body could introduce me a reference or a way to fix this matter.
Thanks a lot for any help.
Talat,
alice | Mon, 02/13/2017 - 11:33
Hi Talat,
Hi Talat,
I would start wir considering cfdemSolverPiso/ErgunTestMPI. In this case a particle packing is created and afterwards the pressure drop of a liquid, streaming through the bed is considered. The solver can handle the interaction of a single fluid phase and particles. Have a look at the settings in the exmaple and use your own physical parameters, boundary conditions, geometry etc. as input.
Best regards,
Alice
tala | Wed, 02/15/2017 - 15:09
Dear Alice
Dear Alice
I am running my case by using ErgunTestMpi, and I have changed some parameters in controlDict and Coupling properties, but there is a problem: the directories of WriteInterval aren't made in CFD folder, run is proceeding. liggghts log is made.
my demt is 0.000003
coupling interval 100
CFD timestep is 0.0003
writeinterval is 0.009
start time 0
and endtime is 9
I started the run by mpirun -np 4 cfdemSolverPiso -parallel
Thanks a lot.
Talat,
j-kerbl | Fri, 02/17/2017 - 09:40
Hi Talat,
Hi Talat,
since you are running in parallel, the time folders (0.001 0.002 ...) are withing the processorX directories. Just open paraview, open controlDict.foam and select decomposed case to view this distributed data. I finds it automatically.
Cheers,
josef