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Eigenvalue Plot for a Two-Parameter 3D Geometry

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Hello,

I am modelling a PDE inside a specific 3D geometry, and using the built-in Eigenvalue studies for different parameters that alter the size/shape of the geometry (i.e width, height).

I have gotten everything to work fine for particular examples; however, since I need to obtain the first eigenvalue for many different combinations of parameters, I have used the Parametric Sweep feature in the Study tree, and run it over all combinations of the two parameters I have (each has about 25 possible values, so that surmounts to about 625 combinations in total).

The parametric sweep ran for a very long time (almost 3 hours), but was successful. However, here is my problem: I am having trouble figuring out how to obtain JUST the eigenvalues for each height and width as a 2-D matrix, and omit the other information that comes with the solution. I have tried several of the available features, but some of them seem to try to export way too much unnecessary other data such as the full solution plots, and the 1-D Plot Group that I tried to use froze up (I presume it's because I set some settings in it wrong, and caused it to try to plot too much since there are 625 combinations of parameters).

So my question is:

Is there an easy way to, after having run a parametric sweep over 2 parameters for the Eigenvalue studies, create a spreadsheet of the lowest eigenvalue in terms of the two parameters?

P.S. the size of the model is rather large, sitting at 330 MB, but not overwhelmingly huge.

0 Replies Last Post 16 mars 2014, 16:06 UTC−4
COMSOL Moderator

Hello Mike Mamaev

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