Comsol moving boundary with loss of mass

AI Thread Summary
To simulate a plate with a hole that increases over time in COMSOL, the Moving Mesh interface should be used if the shape changes due to applied stress. If the shape change involves material removal or addition, the Deformed Geometry interface is more appropriate. Clarification on the type of mass loss is crucial for selecting the right approach. Additional resources are available for further guidance. Understanding the distinction between these interfaces is essential for accurate simulation.
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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!
 
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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)
 
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This might help you in explanation.
 

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