CFDEM®coupling - User Forum

Dear all,

I am trying to setup a CFD-DEM case which should be able to model the particle packing. the geometry is attached in the figure, you can see that lower wall is not on single plane rather on different planes.

Hi Everyone,
I have a question about cfdemSolverIB. How is it possible to consider the same density value for a sedimenting particle and fluid in cfdemSolverIB?
Cheers,
Mohammad

Looks like this is a dead forum.

Hi all,

Hi All,

This is Marshall. I am running a CFDEM case with particles passing through a screen to test the efficiency of particle blocking. However, the simulation needs the particles to pack before passing through the screen to get a better result. Building a wall right above the screen can block all particles and make the pack. After that, remove the wall and let the particles fall, then it can meet all the requirements

Hello,

I work in the cement industry and I am trying to model the particle flow of the material in the preheat that we have to determine the optimal particle distribution and cyclone efficiency. I have managed to do this in OpenFOAM-dev with the new MPPIC solver. However I would like to see the difference between LIGGGHTS and the MPPIC solver. From the best of my understanding LIGGGHTS should produce a more accurate result.

The geometry is complete so a box won't be able to work for the region.

Hi, everyone,
I faced a paper in the featured work part on the cfdem website:
https://www.cfdem.com/featured-work
which is:
"Fully resolved simulations of particle-laden viscoelastic fluids using an immersed boundary method"
The question is how it is possible to use cfdemSolverIB method for a non-Newtonian fluid? I think someone should answer my question as I faced some non-newtonian papers using cfdemSolverIB. However, this solver just has been modified for Newtonian rheology!

Hi everyone, I am struggling with the following simulation.

I want to simulate a rectangular cavity (of 15.6x5.2x1 cm3) fully filled with 1mm spherical particles with an outlet orifice. The particles should be exposed to a constant pressure of ~1000psi(equivalent to 7e6 Pa) while water is injected on the other side of the cavity. For that reason I settled a servo command like:

fix cad2 all mesh/surface/stress/servo file ../DEM/cad/mwall.stl type 1 com 0.075 0.025 0.0 ctrlPV force axis 0. 0. 1. target_val 56000 vel_max 0.005 kp 5

Hello, I have modified the packedBedTemp case of the cfdemSolverPisoScalar solver. In the modified case particles are pre-fed (in.liggghts_init) on one side of a cylindrical furnace rotating on horizontal axis. The inlet, outlet face, wall and interior of the cylinder have predefined temperatures (as set in CFD and DEM files). The target of the simulation is to obtain the temperature profile of the particles. A typical simulation animation (change extension to .avi) is shown in the attachment.