Reply To: Creating region in Ansys Maxwell

[Mark Christini]

The default boundary condition in Maxwell is tangential fields.  So, the region must be large enough to give sufficient room for fringing.  

For example, if the magnetic fields are well-contained as in motor, the padding can be 20-50%.  However, if the magnetic fields are not well-contained, such as two parallel current carrying conductors in air, the padding may need to be 1000% or more.

If the field results change significantly when the region size is changed, the region is not large enough.  

Note: if you are using Maxwell 2D, you can apply a balloon boundary on the outer edge of the region which allows for fringing while using a smaller region.