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Piecewise function implementation

Posted 16 janv. 2013, 12:16 UTC−5 RF & Microwave Engineering, Materials Version 4.2a 2 Replies

Otavio de Brito Silva
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I"ve tried to implement the material properties, more specifically refractive index, in a 2D model of lens. Is there a way to define a piecewise function that describes the refractive index of all domains in my simulation?
2 Replies Last Post 16 janv. 2013, 14:52 UTC−5
Alexander Kuznetsov
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Posted: 1 decade ago 16 janv. 2013, 13:29 UTC−5
Model-Definition-Functions-Piecewise

But piecewise functions should be used with a caution in FEM. Always better to avoid them.
Model-Definition-Functions-Piecewise But piecewise functions should be used with a caution in FEM. Always better to avoid them.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 16 janv. 2013, 14:52 UTC−5
Hi

you can have COMSOL to smoothen them to avoid the singularities, but often it makes the model highly non linear, hence long to solve

--
Good luck
Ivar
Hi you can have COMSOL to smoothen them to avoid the singularities, but often it makes the model highly non linear, hence long to solve -- Good luck Ivar

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