Learning Forum

[Weidong]

I would like to couple DEM and ALE in LS DYNA. For example, a ball modeled by DEM, and it drops into water (ALE). Could you please give me some suggestion? Thanks so much.

[Reno Genest]

Hello Weidong,

There is an example of a sphere dropped in water here:

https://www.youtube.com/watch?v=E1IoUkUIsEU

It is not DEM, but if you have only one sphere, you could mesh the sphere with regular elements and have the sphere rigid:

You will find papers here:

https://apps.dtic.mil/sti/pdfs/AD1011313.pdf

https://www.dynalook.com/conferences/15th-international-ls-dyna-conference/fsi-ale/comparative-analysis-of-occupant-responses-between-ls-dyna-r-arbitrary-lagrange-in-euler-and-ale-and-structured2013ale-s-ale-methods/view

https://www.dynalook.com/conferences/14th-international-ls-dyna-conference/blast/comparison-of-strategies-for-landmine-modeling-in-ls-dyna-with-sandy-soil-material-model-development/view

You can search for more papers on dynalook.com website.

Also, DEM particles can be coupled with the iCFD (incompressible CFD) solver in LS-DYNA:

https://www.dynaexamples.com/icfd/basics-examples/demcoupling

 

Reno.

 

[Weidong]

Hi Reno,

Thanks so much for your help. Your response is helpful for me.

Best regards,

Weidong