Magnets, motion and measurement

[sm0ky2]

@Dieter


If by "Bloch wall" you mean the neutral line in the 'center'
The dielectric inertial plane contains no net magnetism.
Although all of the flux passes through this region,
the very center has a uniform distribution of density
Thus there are (within a range or band) an equal and opposite
N & S within this region that cancel each other out completely

[Floor]

@smOKY2

Thanks much for the expantion.
          floor

[dieter]

@ Smoky,


what I don't get is why does no flux linking occur?
Normally you would expect any field lines to bend and link to a close unlike pole, so one part of the Bloch wall inhabitants should bend to one external pole, the other part to the other pole.


Intrestingly, that may happen nevertheless, because when you do this with only one expernal magnet then aztracting and repelling forces do cancel eachother out, agreed. But if you use two, eg. a North to the right end of the Bloch wall and a South to the left side, then they stick at the bloch wall.


Even tho, FEMM shows fieldlines, passing right along the bloch wall, It seems more likely to me that the bloch wall itself links to the two poles.
I've noticed these two magnets stick at a lightly offset position, one a bit closer to PM1's North, the other one closer to south.


Here I have some interesting simulation shots that show how you can focus a magnetic field and achieve very high fieldstrengths, simply with an iron core of the right shape.


Notice ontop of this Neo magnet sticks a cylinder of Supermalloy, or pure iron of the same diameter. It's fieldstrength at any place barely reaches that of the permanent magnet, about 1 Tesla.


In the second shot there is a thin iron bar, close to the other end of the PM. Notice the fieldstrength of this bar, that reaches 2 Tesla.


And in the third shot there is still about 1.7 Tesla, despite a rather large airgap.


So shape does matter extremly.

[Floor]

@dieter / SmOKY2

On page five of topic below is an    interesting / easy    Mobius strip experiment / explanation.

http://overunity.com/13783/proof-of-overunity-from-magnets-fixture-no-negative-work-aspect-lafonte/msg370730/#msg370730

Addendum.. 

                       ? : If it is neutral to other field lines, why doesn't a given field line just drift away into space ?
          Answer ? : Because it is not neutral... to the randomly polarized atoms in the magnet ?

         field actions (within / around) are not simply between like and un like poles...there is a third element involved
        (other than the electric)    It is the FIELD of the randomly polarized.

       ? If there are interactions between the either / vacuum and organized energy / matter...I seems to me
       that the INTERFACE between these two kinds of (energy ?) occurs through random ness in the
       ordinary / perceivable energy (our world).

I  look at it like this..... that magnet "shape" and the direction of approach between two magnets are both
"a kind of shape".     The one is fixed a constant (for the now)..... the other is a variable.
............................................................................................
I / we.... all  use the language but...

While I consider field lines a valuable and useful convention.... also I don't think of them as real world.....
Like this....

A peice of lumber that is 2 inches by 4 inches by 48 inches long ....is not actually composed of
some things which we call inches and feet. 

Similarly...I don't hink of that region we call a magnetic field as being a thing, but rather it is a mathematical
construct....  A description of a three dimensional volume in space.. in which events can be measured / compared
in relation to their placement within this drawn 3 dimensions "field".

                              regards

[dieter]

Of course I totally agree, "field lines" are just useful to display density and orientation within this magnetic shape of gradient vector force. They are simple short terms and I guess you understand what I mean by them.