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Laplacian eigenvalues with Comsol

Posted 2010/08/23 18:22 GMT-4 4 Replies

Brujita de Siete Suelas
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Hi,

I am a newbie to Comsol.
I was trying to get Laplacian eigenvalues in a 2D closed domain, with a Dirchlet null border condition.
The thing is, how can I do this and obtain actual eigenvalues instead of NaN values.
Thanks in advance for your help.
4 Replies Last Post 2010/08/31 10:19 GMT-4
Brujita de Siete Suelas
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Posted: 1 decade ago 2010/08/30 20:54 GMT-4
So?
Is there anyone there who could give me an advice, please?
Thanks in advance.
So? Is there anyone there who could give me an advice, please? Thanks in advance.
John Peterson
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Posted: 1 decade ago 2010/08/31 9:10 GMT-4
Hola Bruja,
In 3.5a, under
Model Library -> Comsol Multiphysics -> Benchmarks -> Isospectral drum
you will find Poisson's eq. with Dirichlet boundary conditions. there is also a pdf and theory behind, you can modify the example at will.

john
Hola Bruja, In 3.5a, under Model Library -> Comsol Multiphysics -> Benchmarks -> Isospectral drum you will find Poisson's eq. with Dirichlet boundary conditions. there is also a pdf and theory behind, you can modify the example at will. john
Brujita de Siete Suelas
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Posted: 1 decade ago 2010/08/31 10:15 GMT-4
Thanks for answering!
Where I can find COMSOL 3.5a documentation?
(I am working with COMSOL 4)
Thanks for answering! Where I can find COMSOL 3.5a documentation? (I am working with COMSOL 4)
Brujita de Siete Suelas
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Posted: 1 decade ago 2010/08/31 10:19 GMT-4
Don't worry, found documentation.
I am trying this now
Thanks!!
Don't worry, found documentation. I am trying this now Thanks!!

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