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How to do integration of two different eigenfunctions?
Posted Jul 15, 2010, 3:38 p.m. EDT 2 Replies
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Hi,
I am using comsol 3.5a. I am doing eigenvalue analysis in pde mode, and
I would like to do subdomain integration of expresion
witch contains two different eigenfunctions. For example u(of first eigenvalue)*u(of second eigenvalue).
Is it possible to do what I want in GUI? If not, how to do it in .m file?. Thanks.
I am using comsol 3.5a. I am doing eigenvalue analysis in pde mode, and
I would like to do subdomain integration of expresion
witch contains two different eigenfunctions. For example u(of first eigenvalue)*u(of second eigenvalue).
Is it possible to do what I want in GUI? If not, how to do it in .m file?. Thanks.
2 Replies Last Post Jul 15, 2010, 6:26 p.m. EDT
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Posted:
1 decade ago
Hi
there are two interesting operators to understand:
with() and at()
one to select a particular solution, the other for a time series from a solution
check the doc it's too long to say everything here
Goog luck
Ivar
there are two interesting operators to understand:
with() and at()
one to select a particular solution, the other for a time series from a solution
check the doc it's too long to say everything here
Goog luck
Ivar
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Posted:
1 decade ago
Thanks again.
I did exactly what I wanted. I simply put:
conj(with(3,u))*y*with(1,u)
In the expressions line in subdomain integration window in GUI.
And I got the matrix element I wanted.
I did exactly what I wanted. I simply put:
conj(with(3,u))*y*with(1,u)
In the expressions line in subdomain integration window in GUI.
And I got the matrix element I wanted.