Elmer Discussion Forum

Hi community, I have a problem with an electromagnetic model. The model describes a single wire surrounded by air and and an iron cylinder (picture). The solution of the magnetic field strength is lower at increasing distance to the wire than it should be (f.e. r=50mm -> H=1450A/m instead of 2500A/m...

To get a better overview of the problem:

I changed the Steady State Max Iterations, the solver and the preconditioner, but the result doesn't change. Any other ideas what I do wrong? Or is my assumption that H should be nearly the same as in the model without a core?

Yes, I tried it but it does not change anything.

Hi Forum, I hope this is the right forum. I tried to simulate a simple cylindric coil with a core sourrounded by a sphere(see Dropboxlink) with: sphere with a radius of 300mm, coil with a length of 60mm and a radius of 10mm core with a length of 100mm and a radius of 8mm profile of a winding pi*(1.5...

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

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.

That is the problem i have. In which way i can told elmer that this is a cubic spline? Which form should it have?

FEMM is compared to Elmer very easy. But for my bachelor thesis i have to use elmer.

Hi,

Yes, this test works.
Maybe i should try to use MagnetoDynamics as in the example and not the MagnetoDynamics2d solver?

Hi, Thanks for the input. i use the latest svn-version. Maybe i will try it again on Linux. I know that my case-file worked with relative permeability = const. But with an nonlinear curve i have no idea how to do that. In the models manuel it is written that the input of an nonlinear curve should wo...

Hi again, I try to include the B-H-Curve like in the example, but got errors: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 6f61143e #1 6f68ec2f #2 00401261 Anyone an idea what I'm doing wrong? I attached my sif-file, the geometry data a...