B-H Curve MagnetoDynamics2D

The graphical user interface of Elmer
akirahinoshiro
Posts: 27
Joined: 13 Aug 2013, 16:50
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Re: B-H Curve MagnetoDynamics2D

Post by akirahinoshiro »

I think you need the coefficents of the cubic spline function.
In your case file there are german words so I think you can handle this site:
http://www.arndt-bruenner.de/mathe/scri ... spline.htm
I hope this will help.
Bavragor
Posts: 32
Joined: 07 Nov 2013, 14:10
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Re: B-H Curve MagnetoDynamics2D

Post by Bavragor »

You are right. I'm from germany. Thanx for the link.
But the problem is how to give the coefficients so that elmer understand it.

btw: Thanx a lot for the help.
mzenker
Posts: 1998
Joined: 07 Dec 2009, 11:49
Location: Germany

Re: B-H Curve MagnetoDynamics2D

Post by mzenker »

Hi,

you can use a table and let Elmer do the cubic spline, see here. That is not exactly what you want, though, and might not solve your problem. You might also try to define your spline using MATC or a user defined function, the latter being favorable in execution time.

HTH,

Matthias
Bavragor
Posts: 32
Joined: 07 Nov 2013, 14:10
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Re: B-H Curve MagnetoDynamics2D

Post by Bavragor »

Hello again,

I just want to say, that i wasn't able to solve the problem with your help. But I'm hoping that someone will get it and write it in the documentation :)

Thx to all who tried to help me
mzenker
Posts: 1998
Joined: 07 Dec 2009, 11:49
Location: Germany

Re: B-H Curve MagnetoDynamics2D

Post by mzenker »

Hi,

are you saying that my last post doesn't answer this question:
Bavragor wrote: But the problem is how to give the coefficients so that elmer understand it.
Or what else is your problem?

Matthias
mzenker
Posts: 1998
Joined: 07 Dec 2009, 11:49
Location: Germany

Re: B-H Curve MagnetoDynamics2D

Post by mzenker »

In the testcase, the H-B curve is given as a table in an extra file. If you can represent your permeability that way, you can take the testcase and try to modify it so that it suits your needs.

HTH,

Matthias
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