Comsol moving boundary with loss of mass

SSS_04

I need some help!My problem is a problem of moving boundary with loss of mass.... I started to use COMSOL and I need to simulate one plate with a hole on the center. And this hole is increasing with the time according to one equation (like a velocity, in m/s) which depend of the stress. Someone knows how to do this? Can I do this whit the moving mesh? Or I should use the DG?
Thank you!

niklas.r

It is not clear to me what exactly you mean with mass loss here. If the structure is changing shape due to applied stress (->strain), use the Moving Mesh interface. If the structure is changing shape due to material removal/addition, use the Deformed Geometry interface. This link gives some more info:
http://www.comsol.com/support/knowledgebase/970/
regards
Niklas (COMSOL employee)

ishantj

This might help you in explanation.