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Problem with differentiation in COMSOL 3.5 a
Posted Dec 20, 2010, 3:18 p.m. EST 0 Replies
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I defined a PROJECTION COUPLING VARIABLE named magflux (magnetic flux) and I exported the values of this variable vs a range of z coordinate values successfully but, when I try to export the data of the derivative of magflux (my PROJECTION COUPLING VARIABLE) with respect to z, all the values I get are equal to zero.
I have tried doing
1. magfluxz
2. magflux,z
3.diff(magflux, z)
4.d(magflux, z)
5.pd (magflux, z)
and any of these worked out. I also tried to do, just to test, pd(normB_emqa,z) and all the values are zero.
Can somebody tell me what am I doing wrong?
By the way, is there a way to fix a polynomial to a set of data (x,f(x)) in COMSOL?
THANK YOU FOR YOUR HELP.
P.S. I am attaching 2 pictures of what I have done to make clearer my problem.
Hello Igor P.
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