hello
I'm not sure I really catch fully your request, but to calculate the volume, surface, length you simply apply a "Integration Coupling Variable" on a Subdomain, Boundary, respectively Edge, you define the geometrical object onto where to integrate, and you integrate with the value "1".
It's not writen fully out but these GUI's are there to calculate th integration over dV=dx,dy,dz, dA=dx,dy, respectiely ds (or whatever Geometry Reference Coordinate you are using, length is slightly particular as it differs slightly depending on the number of DoFs seleted, have a read through the manuals).
Such an integratin can only be calulated once the volume is meshed and the solver initialised (use Solve Get Inital Value).
Now if you want to get the mesh difference before and after "deformation" you have either the "u,v,w" values to play with or you could perhaps turn on the "frame" (Physics Properties Crate Frame On) and then integrate on the different frames you define.
I would suggest that you write out the equations of what you want to do and then read through the manuals, start to test with a simple case.
Comsol, in opposition to most other FEM programmes is really a global physics PDE solver, so you should really switch to thinking physics from the PDE world side, not the first though fr those of us trained to use more traditional FEM programmes
Good luck
I'm not sure I really catch fully your request, but to calculate the volume, surface, length you simply apply a "Integration Coupling Variable" on a Subdomain, Boundary, respectively Edge, you define the geometrical object onto where to integrate, and you integrate with the value "1".
It's not writen fully out but these GUI's are there to calculate th integration over dV=dx,dy,dz, dA=dx,dy, respectiely ds (or whatever Geometry Reference Coordinate you are using, length is slightly particular as it differs slightly depending on the number of DoFs seleted, have a read through the manuals).
Such an integratin can only be calulated once the volume is meshed and the solver initialised (use Solve Get Inital Value).
Now if you want to get the mesh difference before and after "deformation" you have either the "u,v,w" values to play with or you could perhaps turn on the "frame" (Physics Properties Crate Frame On) and then integrate on the different frames you define.
I would suggest that you write out the equations of what you want to do and then read through the manuals, start to test with a simple case.
Comsol, in opposition to most other FEM programmes is really a global physics PDE solver, so you should really switch to thinking physics from the PDE world side, not the first though fr those of us trained to use more traditional FEM programmes
Good luck