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.

Acoustic dispersion relationship of a metamaterial with losses

Please login with a confirmed email address before reporting spam

Hello,

I'm trying to derive acoustic dispersion relationship considering losses in the unit cell.

I manage to do it in the lossless case solving for the eigenvalue problem with a Floquet-Bloch periodicity condition and a parametric study on the bloch wavenumber in one direction only.

Is there a specific module or procedure to achieve this considering losses in the air ?

I hope the problem is clearly stated and people will have a solution.
Thanks

1 Reply Last Post Jan 19, 2017, 3:51 a.m. EST
Mads Herring Jensen COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 8 years ago Jan 19, 2017, 3:51 a.m. EST
Hi Alexandre

In this model we include thermal and viscous losses:

www.comsol.com/model/sonic-crystal-16925

Best regards
Mads
Hi Alexandre In this model we include thermal and viscous losses: https://www.comsol.com/model/sonic-crystal-16925 Best regards Mads

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.