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How to model reflecting boundary condition

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Hi there,

I am a newbie in COMSOL. As part of my project, I have a piezoelectric material which is excited with IDTs on the surface. As a result I have waves propagating along the surface. Now I need to model some kind of a trench on the surface in 2D. I think I can achieve this by defining a reflective boundary condition at the far end of material but I am not sure what boundary condition to use. Your help is appreciated.

Cheers,
Alp

EDIT: I think If I leave the boundary untouched I think that means it is solid? Since that way I get some reflections back

0 Replies Last Post 7 ago 2017, 03:44 GMT-4
COMSOL Moderator

Hello Alperen Erol

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