CFD and DEM - General Discussion

Hi, I am working at Aalborg University. We have done extensive testing on dense sand, undrained conditions, and found it has response slightly beyond what currently is "state of the art". Namely - we concentrated on the after loading when 1000 cyclic loads sustained by the sample. We do the tests on a single diameter height test under slipping boundary conditions - the kind of triaxial tests that give homogeneous stress state inside the sample, leading to results exceptionally well suited for FEM or numerical simulation.

Dear scientific community,

I am intending to create digital furnace whose components should have some type of own intelligence described by their own physical, chemical properties and be able to modulate the properties due to occurred situations. The "intelligent" components should be autonomous but also able to be connected and therefore represent uniform device (such as Lego).

Consider shaft furnace for magnesia sintering.

Hi, all
I am simulating a fluid flow in a periodic cylinder pipe using OpenFOAM.

The 0/U and 0/p files are set as following:

0/U
inlet
{
type cyclic;
value uniform (0 0 0);
}
outlet
{
type cyclic;
value uniform (0 0 0);
}
wall
{
type fixedValue;
value uniform (0 0 0);
}

Hi every body!
I want to know what is the most important advantage of LIGGGHTS in comparison to commercial software like PFC3D? In other word, what can LIGGGHTS do that PFC3D cannot do?

Hi All,

I would like to do a coating simulation, which means when two particles contact, one is coating particle, the other one is core particle (They could be defined in different groups or types), the coating particle will be deleted, while the mass of coating particle will be added to the mass of core particle.

Dear all,

I have installed OpenFOAM 2.2.1 on my ubuntu 12.04, and also CFDEM coupling seems woking smoothly.

In recently a case used on OpenFOAM 2.1.x was downloaded, the case is similar to my research field, so I do want it run on my OpenFOAM 2.2.1 and modify it to personal case. But when tried to compile the sovelor, it occored a error like this,

sofcFoam.C:57:25: fatal error: porousZones.H: No such file or directory
compilation terminated.
make: *** [Make/linux64GccDPOpt/sofcFoam.o] Error 1

Just starting my learning curve in discrete element method.

I am having trouble wrapping my head around the concept of the particle overlap during the particle to particle collisions. I feel the change in void fraction would introduce a good amount of error.

Is there some good literature on the concept?

Thanks

Dear community,

I'm interested in finding research groups specializing in the field of CFD\DEM\CFD-DEM with applications to chemical engineering\reaction engineering processes mainly in Germany.

Does any of you know of any groups with open PhD positions in this field located in germany ?
I would appreciate your kind help !

David

Dear all,
hi
I want to simulate a Banana Screen like the attached file using LIGGGHTS. But, the problem is that I do not know how can I measure the overall mass of the particles over the conveyors? I need the masses for computing the screen's separation performance. Is there any command in LIGGGHTS which is able to measure the mass? Any suggestion would be appreciated!

Sincerely Yours,
M.Jahani

Hello everybody
I am beginner with the LIGGGHTS and have a fundamental question.
What are the limitations to use LIGGGTHS for simulation of nano-particles in aqueous media? Is this software restricted only for granular microscopic particles or even applicable for simulation of mesoscopic colloids? For example, can it be an alternative for DPD (Dissipative particle dynamics) or SRD (Stochastic rotation dynamics) methods in simulating colloids sedimentation or aggregation?
Regards