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Variable access in different modelareas (RF-Module)

Posted Feb 4, 2011, 5:19 a.m. EST RF & Microwave Engineering, Materials Version 4.0a, Version 4.1 2 Replies

Jan Wittke
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Hi,

I have a build a simple model with two domains with the rf-module. This model has two domains with two
different materials. So it has two different values for the wavevector.

Now I want to use the value of the wavevector from domain 1 and from domain 2 to calculate a constant impedance.

How do I access this variables?

I know the overall wavevector is emw.k

But how is the vector called for i.e domain 1 ? emw.??.k ?


Thank you!
Jan
2 Replies Last Post Feb 4, 2011, 9:05 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Feb 4, 2011, 8:12 a.m. EST
Hi

you have just hit the "implicit" indexing of COMSOL ;)

It is important to understand that most physics dependent variable are defined with an implicit index corresponding to the applicable domain or boundary. These variables truely apply to the mesh element of size dx*dy*dz and not to the global macroscopic entities we are normally dealing with (domains, boundaries)

So if you want the "macroscopic" variables you must define these typically as integration over some domain or averages over some domain/boundaries etc, all depending on what you need

--
Good luck
Ivar
Hi you have just hit the "implicit" indexing of COMSOL ;) It is important to understand that most physics dependent variable are defined with an implicit index corresponding to the applicable domain or boundary. These variables truely apply to the mesh element of size dx*dy*dz and not to the global macroscopic entities we are normally dealing with (domains, boundaries) So if you want the "macroscopic" variables you must define these typically as integration over some domain or averages over some domain/boundaries etc, all depending on what you need -- Good luck Ivar
Jan Wittke
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Posted: 1 decade ago Feb 4, 2011, 9:05 a.m. EST
Ahh yes,


great I got it.


Thanks,

Jan
Ahh yes, great I got it. Thanks, Jan

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