CFD and DEM - General Discussion

Hello Everyone,

I have recently started to use LIGGGHTS and loving it so far. I am trying to generate a steel ball of diameter 30 mm inside a defined spherical region, and I want to generate the ball at the center of the region but it is randomly being generated elsewhere. So I want to know if there is any fix or way to generate it at the center.

Hi. I am trying to use LIGGGHTS and ANSYS Mechanical for studying the erosion wear of a mesh. The coupling will be one way coupling. I will transport the LIGGGHTS stress file to ANSYS. I know that you need to export mesh coordinates and the force on the mesh data from LIGGGHTS to ANSYS to do this coupling. Since, I am a beginner, I have a very less idea on how to do it. Could anybody suggest or provide a sample LIGGGHTS script explaining how these results could be exported in CSV format to ANSYS? Thank you

Hi,

I am planning to couple CFD with DEM to simulate the influence of waves on sand dunes, starting with a wave flume setup. I am relatively new to CFD and DEM. So far, I have prepared my own cases for both CFD and DEM and successfully validated the benchmark particle settling case using CFDEM. Additionally, I have independently used olaFlow with OpenFOAM to generate regular waves.

Hi,

Dear colleagues,

We are pleased to invite you to participate and contribute to the 2024 International CFD Challenge on the long-range indoor dispersion of pathogen-laden aerosols. The objective of this challenge is to assess the ability of RANS and/or LES to reproduce both the hydrodynamics of the turbulent natural convection and the dispersion of aerosol clouds in a room-sized enclosure. The impact of turbulence modelling will be determined by comparing selected transport metrics to existing DNS results. Further information about the Challenge can be found at

It seems that the Lpp in CFDEM project in Github does not exist anymore, which causes the installation of it through Github does not work.

Hi CFDEM forum,

New here, first post. Hence, naive question:

Hello CFDEM community

In my case I need to model the settling of particles on a Filter.
Is it possible to represent a filter by a porous region through wihich particles do not diffuse?
Or are there any other possibilities to reduce the computational effort of Filter.

Thanks in advance
MCG

I am Stephen and a beginner of LIGGGHTS. I am interested in simulating undrained cyclic triaxial test, but I am not finding the resources, could anyone please share them with me?

This is my e-mail address: akosah@tongji.edu.cn/akosah.as@gmail.com.

Thank you.

Kind regards,

Stephen.

I have created a particle growth simulation in LIGGGHTS using fix command:
fix ID group-ID insert/pack seed seed_value distributiontemplate dist-ID general_keywords general_values pack_keywords pack_values ...

I want to shrink the same particle. The growth that has already happened, I want to undo the process overtime again.

I don't understand how to proceed it.