Insert particles from region

Submitted by carlesbp on Thu, 04/03/2014 - 20:52

Hi everyone!

I was wondering if it is somehow possible to define a region, introduce particles on it through the command create atoms and insert them to another region.
For example, create a cylinder full of particles, creating a pack, and drop it to a surface. Is that possible or the closest option is using the insert/pack command?

Thanks in advance!

Forums:

richti83's picture

richti83 | Thu, 04/03/2014 - 22:09

.. you will not get a dense packing bc. insert packs brute-force-insert-algorithm is somehow limited to I think 30% voidfraction.
I would use fix insert/stream to pour the particles into the cylinder and than lift up the cylinder using fix move mesh to measure the angle of repose.
See this videos how I did it:
http://ubuntuone.com/7gs5dGUf5CuxVAFkTotw3E
http://ubuntuone.com/1GDMOGvk5WQmRsJXDBy1xU

Best,
Christian.

I'm not an associate of DCS GmbH and not a core developer of LIGGGHTS®
ResearchGate | Contact

ckloss's picture

ckloss | Fri, 04/04/2014 - 10:00

Yes, fix insert/pack is limited to 30% particle volume fraction. But you can use fix insert/stream or you can grow the particles over time - there is also an example for this in the public release

Christoph

carlesbp | Fri, 04/04/2014 - 12:50

Thanks for your reply and the videos Christoph, I see what you mean. I think the insert/stream will be the option for me!!