Dynamic region possible?

Noel682's picture
Submitted by Noel682 on Sun, 05/01/2016 - 20:05

Hi everyone,

For my M.Sc. Thesis, I am interested in using dynamic groups, using LIGGGHTS 3.3.1 (public).
Is this somehow possible?

According to the group command, this should not be possible, but maybe I am not looking the most updated link
http://www.cfdem.com/media/DEM/docu/group.html

any suggestion would more than welcome.

Greetings, Luca

Forums:

aaigner's picture

aaigner | Mon, 05/02/2016 - 16:39

Hi Luca,

the documentation is correct. Currently, this feature is not implemented.

I am not sure, how difficult it will be to port this feature from LAMMPS to LIGGGHTS.
Sry, no better news.

What do you want to do with them? Maybe there is another solution for your problem.

Bests
Andreas

giuraso's picture

giuraso | Tue, 05/03/2016 - 18:14

Hi,

I believe a REGION is "dynamic"... for example if you use the command SET with Region style you don't have any problem. So you are referring to dynamic groups. If you need to use something like compute or dump maybe you can try (not sure) to create a loop that delete and reassign your group... something like

...
group ID region REG

label loop a
variable a loop 999
group ID delete
group ID region
#use your new group
run 9999
next a
jump in.script loopa
...

(not sure about the syntax).

Cheers