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Old   April 12, 2012, 09:09
Arrow Demagnetization field
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Jan
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Hi,

I am quite new in ANSYS and I have a question regarding simulation of magnetic behavior of ferromagnetic material. As far as I know, in every ferromagnetic body a demagnetization field is created, when the body is magnetized.
The size of the demagnetization field is shape-dependend through a demagnetization factor.

Does ANSYS take this demagnetization field into acount?
Does it depend on the selver option I use? I'm using the RSP method.

_________________________
I attached a simulation result, where the H-field is displayed. The inner body is a ferromagnetic flat cylinder. Then there is a fine meshed air body and then another air body which is meshed more roughly.

The xternal magnetic field I create with
nsel,s,loc,x,-xmax
D,ALL,MAG,xmax*hfield0 ! APPLY POTENTIAL TO GIVE 100 TESLA FIELD
nsel,s,loc,x,xmax
D,ALL,MAG,-xmax*hfield0 ! APPLY POTENTIAL TO GIVE 100 TESLA FIELD
____________________________

Am I right with my assumption, that the H-field inside the ferromagnetic body is smaller than H-field in the air because of the demagnetization field in the body?

Kind regards
Jan
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