CFDEM®coupling - User Forum

Hi all,

As we can see, until now, the public version of CFD-DEM scheme cannot be used to coupling simulation considering particle shape. To realise this function, the easiest way may be using bonded multi-sphere modes to simulate particle shape, while not using superquadric function. Also, the solid-fluid interaction forces, e.g. drag force model, should also be modified. My confusion are:

Greetings,

I need to create a scalar wich give me as result the concentration of particle per cell. This post of the forum did it (https://www.cfdem.com/forums/fluidized-bed-chemical-reactors). Could someone help me replicate it in my simulation?
It seems that need to compite something.

Thank you already,
Kesley A. Santos

Greetings,

What does mean vSmoothField and sSmoothField?

Hi,
I am working on cfdemSolverIB and I have obtained good results for multiple Newtonian cases. However, I want to implement the Herschel-Bulkley non-Newtonian fluid model in my fluid field, which I faced some noteworthy issues.
We know that in Newtonian cases for cfdemSolverIB, based on the Patankar IB method, the particle velocity imposing in the fluid velocity field is equal to considering the below source term in NS equation:
rho*d(ubar-u)/dt

Dear Ladies and Gentlemen,

I plan to modify the hertz model to consider diffusion.

So I work in the script of the model normal_model_hertz.

How can I use this model in liggghts? my plan is to insert my new script in the src folder.
How can I assign this contact model in my script?
Which command I have to use to in my liggghts script, to use this model instead of the hertz model?
How can I implement and load my new model in the liggghts library?

So far I use this command to use the hertz Model:

Hello Team, is there any document or guidelines on best practices to set up a CFDEM case? For example, cell size estimation from particle size, coupling interval for inertial and kinetic flows. Perhaps, we all want our simulations to be as accurate as possible. Thank you.

Hello,

I am wondering if it is possible to run LIGGGHTS with a cohesion model coupled with openfoam.
Is it as simple as adding in the liggghts.run file cohesion sjkr model?
I tried to find documentation on it that explicitly says that its possible but I thought someone here might know.

Also, is it possible to specify which particles have cohesive value and which don't? I would like 3 larger size particles to be cohesionless and the 4th particle to have cohesion.

Thank you

Dear Ladies and Gentlemen,

is it possible to implement a mechanical load on my particle sample?

Hello, everyone

I am analyzing the voidage between particles. The slice view shows only the outer surface of the particles. I tried to change the solid color, but it changes the outer surface of the particles. How can I obtain already colored particles in Paraview (Slice)?

Thanks in advance

Hi Everyone,

I need urgent help. I need to couple Ansys Fluent with LIGGGHTS.

How to make this?

Thanks