Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Boundary condition on metal-air interface

Please login with a confirmed email address before reporting spam

Dear Forum-User,

in my current simulations (Comsol version 4.0a) I try to model the interaction of light (plane-wave; IR) with a metallic nano-structures.
I set the structure to be made of gold defined by its dielectric losses using Drude model (implemented as an analytic function depending on the frequency). The metallic strucutre is surrounded by air. The simulation volume is embedded in PMLs. The model is solved time-harmonic/stationary (Helmholtz).
My problem is now, that Comsol defines the boundary between air and metal automatically. Sometimes it is set automatically to PEC, which is surely not what I need. In other cases these boundaries are just not applicable. In older Comsol versions such boundaries could be set to continuity. It seems to me that this is not possible anymore in Comsol 4 by means of manual setting.
I can for sure set the boundary to be e.g. a 'impedance boundary' but I want to resolve the skin depth.

Maybe one of you has an idea, what I am doing wrong.

Thank you very much in advance.

Greetings,
Peter

1 Reply Last Post 10 mars 2012, 11:41 UTC−5
COMSOL Moderator

Hello Peter Banzer

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.


Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 10 mars 2012, 11:41 UTC−5
Isn't there a "continuity" option?
Isn't there a "continuity" option?

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.