Originally posted by bistander
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Hi Bistander,
I do understand FEMM, its principle is based on iron filings display of Magnetic Fields.
I understand that curves where they are closer to each other's are stronger areas than when more spaced apart...correct?
Now, on the type of magnet under test, where Poles are so close to each other's...as also being a very strong Neodymium Magnet...that so short distance iron filings or powder will never show such difference in low potential, in that reduced center, cause of poles being so close together...only ferrofluid would.
Point is...your white line is just free handed as you have seen with ferrofluid on my pics...nothing less nothing more...my 3 Years old grand daughter could do that as well if I ask her to reproduce it from pic to FEMM diagram...

All FEMM Flux curves between poles (smallest curves) represent the way iron filings would do...an Inflated "belly" shape.
We have been using ONE WAY DIRECTIONAL particles (FERROMAGNETIC) to find out the Shape of a DIPOLE FIELD...Instead of a BIDIRECTIONAL PARTICLE which is Ferrofluids based on.
Ferrofluid DIVERGE-SPLIT POLARIZATIONS showing a weaker area (shrinked) at Center of every magnet ...the correct way to image a DIPOLE FIELD.
Regards
Ufopolitics






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