Contact Information from LIGGGHTS

Submitted by b.saprativ on Mon, 10/26/2015 - 10:27

Hi,

I am trying to extract information of contacts between particles from LIGGGHTS.

Contact Normal Forces, tangential forces, position, vectors, particle id contributing to each of the contact points.

Please give some idea how to do so from the software. Any information regarding these will be helpful.

Thanks in advance.

Forums:

richti83's picture

richti83 | Mon, 10/26/2015 - 22:01

use
http://www.cfdem.com/media/DEM/docu/compute_contact_atom.html

compute cp all pair/gran/local id pos force contactArea #ball-ball contacts
compute fwc all wall/gran/local id pos force contactArea #ball-wall contacts

and
http://www.cfdem.com/media/DEM/docu/dump.html

dump dmp_pc all local 1 post/fc*.dump c_cp[1] c_cp[2] c_cp[3] c_cp[4] c_cp[5] c_cp[6] c_cp[7] c_cp[8] c_cp[9] c_cp[10] c_cp[11] #particle chain

dump local
and to read in the dumpfile to ParaView
https://github.com/richti83/ParaView_Reader_for_LIGGGHTS/blob/master/pre...
or use matlab or any other tool you prefer

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

b.saprativ | Wed, 01/13/2016 - 08:20

Hi Sir,

Thanks for your kind and prompt reply.

It will be helpful if you can give some more idea on c_cp[1] c_cp[2] c_cp[3] c_cp[4] c_cp[5] c_cp[6] c_cp[7] c_cp[8] c_cp[9] c_cp[10] c_cp[11].

Which of these are co-ordinates of contact position, contact vectors and contact force components (tangential and normal forces)?

Thanks & Regards

Saprativ Basu