CFDEM®coupling - User Forum

Hello,

I'm trying to reconstruct cases described in article: "Simulation of Sedimentation of a Sphere in a Viscous Fluid Using the Lattice Boltzmann Method Combined with the Smoothed Profile Method" by Suresh Alapati, Woo Seong Che, and Yong Kweon Suh, and here A. ten Cate, C. H. Nieuwstad, J. J. Derksen, and H. E. A. van den Akker, “Particle imaging velocimetry experiments and lattice-Botlzmann simulations on a single sphere settling under gravity,” Physics of Fluids, vol. 14, no. 11, pp. 4012–4025, 2002.

i hav inserted particles of size 100 micron into a container (taken as servo wall). I need to know the container wall stresses from paraview. What syntax i hav to add to the script? the script file and stl are attached..

Hello all,

I want to restart my simulations since the cluster I use does not permit to run beyond certain walltime.

I configured the case according to ErgunTestMPI_restart.
However, when I restart the simulations, all the files in processor* dirs are cleaned.
Of course, than it complains about not finding p in the latest time dir.

How can I prevent the clean up before the simulation starts?

Thanks.

regards,
Vinay

Dear Everyone:
I have installed foam-extend 3.1 with ubuntu 15.01 here on my local machine. I want to install CFDEM with this OF as I noticed CFDEM 3.00 is compatible with of30 and Ext 32. But when I run cfdemSysTest. I got following information:
mpic++:
/home/zhang/foam/foam-extend-3.1/ThirdParty/packages/openmpi-1.6.5/platforms/linuxGccDPOpt/bin/mpic++
--------------------------------------------------------------------------
The Open MPI wrapper compiler was unable to find the specified compiler
no in your PATH.

Hello,
I am trying to compile CFDDEM. I recieve this error. As seen below, i have openfoam version 2.3.1. Ligghts is already compiled and works fine for me.
collect2: error: ld returned 1 exit status
make: *** [/home/rhewum/OpenFOAM/rhewum-2.3.1/platforms/linux64GccDPOpt/bin/cfdemPostproc] Error 1
compilation done.

Hello all,

Do any of the CFDEM coupling solvers allow for heat conduction (not convection) in a static fluid present in a packed bed?

Regards,
Joel

Dear all,

My problem is within combining multiple blocks within the CFD blockmesh (using uniform mesh cells), which results in a badly calculated void fraction.

For my problem I do not want to use a typical duct (1 block) but a cylinder (many blocks). In order to simulate such a geometry the cfdemsolverIB requires uniform cells. Combining multiple blocks in the BlockMesh can approximate a cylinder using uniform cells (see figure).

Part of the Blockmesh will then look like:

Hi,

For some time I'm using cfdemSolverIB for my research purposes. Thanks for this project, you have made a great job. During the reading of some related papers I didn't found anything regarding the error analysis for coupling procedure.

In example, the original Issa's paper about the PISO algorithm he gives a proof that we need two corrector procedures per time step required to achieve errors of order: O(∆t^4) for velocity and O(∆t^3) pressure.

Dear all,

I want to simulate a large particle moving through a (cylindrical) tube. However, as a cylindrical tube uses a non-uniform mesh, the CFD-DEM coupling does not work properly.

Dear DCS team,

I hope I am using a right version of CFDEM 3.0 Manual, but I cannot find out the description for several newly added models such as field time average model; volume weighted average model... I just want to quickly understand how these new model work in CFDEM3.0.

Thanks,