Keeping a sinlge particle fixed

Raïsa Roeplal

Dear EDEM users,

I would like to do some investigations with polyhedral particles regarding the contact forces. I use only two particles in the simulation, as shown in the screenshot. For the purpose of my investigation, I would like to keep one particle fixed while the other particle is allowed to move freely. How can I fix one particle in my simulation?

Any advice is much appreciated. Thanks in advance!

Cheers,

Raisa

Stefan Pantaleev_21979

Hi Raisa,

The best way would be by zeroing the particle forces using a plugin particle body force that is produced using the EDEM API. A tutorial for producing a plug in body force can be found here::

https://community.altair.com/csm?id=kb_article_view&sysparm_article=KB0037689&sys_kb_id=e3e163661b421d10507ca6442a4bcbe1&spa=1

More information can be found in the EDEM programming guide:

https://help.altair.com/edem/Programming_Guide.htm

A simpler but imperfect alternative is to increasing the mass and moments of inertia of the fixed particle to extremely large values:

Best regards,

Stefan

Stephen Cole

Stefan Pantaleev_21979 said:

Hi Raisa,

The best way would be by zeroing the particle forces using a plugin particle body force that is produced using the EDEM API. A tutorial for producing a plug in body force can be found here::

https://community.altair.com/csm?id=kb_article_view&sysparm_article=KB0037689&sys_kb_id=e3e163661b421d10507ca6442a4bcbe1&spa=1

More information can be found in the EDEM programming guide:

https://help.altair.com/edem/Programming_Guide.htm

A simpler but imperfect alternative is to increasing the mass and moments of inertia of the fixed particle to extremely large values:

Best regards,

Stefan

Hi,

 

You can also use the 'fixed velocity' option shown in the bottom left of the screenshot above. You would have to create two different particle types as this option applies to all particle of the same type, however once selected the particle remains at the velocity it was created at in the factory.  If it is created at zero velocity then it remains this way for the remainder of the simulation.

Regards

Stephen