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Showing results 1 to 25 of 1141
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Search: Posts Made By: bistander
Forum: General Discussion 06-21-2018, 09:03 PM
Replies: 357
Views: 6,136
Posted By bistander
Link fixed

You need to click from the linked page to get the full article. It's not too long or deep into math.

I just don't see anything done with EM (electromagnetism) and ferrocells.

bi
Forum: General Discussion 06-21-2018, 07:57 PM
Replies: 357
Views: 6,136
Posted By bistander
Circles of Apollonius

Interesting vid. I assume the image on the left is like this (b, lower) although I never got a good look at it.
...
Forum: Renewable Energy 06-20-2018, 09:38 PM
Replies: 3,807
Views: 474,689
Posted By bistander
Clarence R.I.P

Too bad. Regrets.

bi
Forum: General Discussion 06-13-2018, 10:32 PM
Replies: 357
Views: 6,136
Posted By bistander
Electric potential

The permanent magnet doesn't have a measurable electric potential. In fact, some rare earth magnet material is electrically conductive. However I think that the magnet's field when interacting with...
Forum: General Discussion 06-13-2018, 06:48 PM
Replies: 357
Views: 6,136
Posted By bistander
90

Hi Pascal,

Welcome to this board.

From your paragraph which I quote, the image seen from a ferrocell or CRT resulting from a permanent magnet field is likely that of an electric field and not...
Forum: General Discussion 06-10-2018, 07:19 PM
Replies: 357
Views: 6,136
Posted By bistander
Analogy

Imagine, if you will, an intelligent person who is blind from birth. Now explain, in common and in scientific terms, what light is to that person.

Now imagine doing that when you are also blind...
Forum: General Discussion 06-08-2018, 09:47 PM
Replies: 357
Views: 6,136
Posted By bistander
Magnetic vector potential

Obviously the equation didn't copy and paste so well. It said that the magnetic field vector B is equal to the curl of the magnetic vector potential A

From wikipedia
...
Forum: General Discussion 06-08-2018, 06:55 PM
Replies: 357
Views: 6,136
Posted By bistander
Nanorods

Hey dyetalon,

Stumbled upon this.

http://www.energeticforum.com/attachment.php?attachmentid=20981&d=1528484018


https://www.comsol.com/blogs/gaussian-beam-striking-array-nanorods/
...
Forum: General Discussion 06-08-2018, 05:39 PM
Replies: 357
Views: 6,136
Posted By bistander
Magnetic vector potential

Isn't this an example?

http://www.energeticforum.com/attachment.php?attachmentid=20979&d=1528479103



http://www.energeticforum.com/attachment.php?attachmentid=20980&d=1528479125
Forum: Forum Help & Support 06-08-2018, 04:33 PM
Replies: 39
Views: 658
Posted By bistander
Interesting

It didn't mention the iron filings.
Forum: General Discussion 06-07-2018, 05:25 AM
Replies: 357
Views: 6,136
Posted By bistander
Which side

http://www.energeticforum.com/attachments/general-discussion/20966d1528302533-about-ferrocell-ferrolens-halbach-side-view-509-1c-jpg

Hi dyetalon,

Brings up a question. Using the above image,...
Forum: General Discussion 06-06-2018, 10:04 PM
Replies: 357
Views: 6,136
Posted By bistander
Halbach Arrays

Hi dyetalon,

Modified a couple images. Will add comments in a while.

http://www.energeticforum.com/attachment.php?attachmentid=20969&d=1528322149
...
Forum: General Discussion 06-06-2018, 03:14 PM
Replies: 357
Views: 6,136
Posted By bistander
Check please

Hi dyetalon,

Can you check and verify the orientation of the magnet on the right end of the array in this photo? If possible maybe take a photo prior to covering with Fe powder showing each cube's...
Forum: General Discussion 06-06-2018, 04:52 AM
Replies: 357
Views: 6,136
Posted By bistander
Halbach array

http://www.energeticforum.com/attachments/general-discussion/20954d1528244114-about-ferrocell-ferrolens-halbach-array-under-509-1-png

It appears that you have cube magnets in a plastic holder that...
Forum: General Discussion 06-06-2018, 01:19 AM
Replies: 357
Views: 6,136
Posted By bistander
Halbach array

Nice cell, dyetalon. Did you have them arranged so:

http://www.energeticforum.com/attachment.php?attachmentid=20958&d=1528247705

From: https://www.kjmagnetics.com/blog.asp?p=halbach-arrays
...
Forum: General Discussion 06-05-2018, 10:31 PM
Replies: 357
Views: 6,136
Posted By bistander
Wrong

You really don't understand the dipole. Isn't there a physics professor nearby who would explain it to you?

You cannot treat the dipole as if it were two monopoles.
Forum: General Discussion 06-04-2018, 04:11 AM
Replies: 357
Views: 6,136
Posted By bistander
Iron filings again

You're the one who brought it up, again.





I don't, and never did, insist on using iron filings, and I am unaware of any companies or scientists using it. The thing I find objectionable is...
Forum: General Discussion 06-03-2018, 05:41 AM
Replies: 357
Views: 6,136
Posted By bistander
Magnetic field mapping

It's been a long time since I worked in the field (no pun intended) and tools have advanced considerably. You think professionals who build and use this type of equipment would have noticed this...
Forum: General Discussion 06-03-2018, 04:55 AM
Replies: 357
Views: 6,136
Posted By bistander
3-d

Iron filings do not flow as easy as the nanoparticles in ferrofluid in liquid but enough to give a good indication of the 3-D shape. So yes, the picture and diagrams which I posted a few minutes ago...
Forum: General Discussion 06-03-2018, 04:35 AM
Replies: 357
Views: 6,136
Posted By bistander
No reversal

Thanks for the reply dyetalon.

The magnetic field doesn't reverse in the magnet. The B-field is in the same direction throughout. When the material is fully magnetized, all the microscopic...
Forum: General Discussion 06-03-2018, 02:44 AM
Replies: 357
Views: 6,136
Posted By bistander
Bar magnet

http://www.energeticforum.com/attachment.php?attachmentid=20935&d=1527991552

Magnets and the magnetic field Electric currents create magnetic fields Magnetic fields of wires, loops, and solenoids...
Forum: General Discussion 05-30-2018, 04:32 PM
Replies: 357
Views: 6,136
Posted By bistander
Good research on the subject

http://www.ferrocell.us/references/Magnetically%20Controlled%20Reflection%20of%20a%20Ferrofluid%20Cell.doc

Magnetically Controlled Reflection of a Ferrofluid Cell

Michael Snyder
Department of...
Forum: General Discussion 05-30-2018, 12:25 AM
Replies: 357
Views: 6,136
Posted By bistander
No flow/little arms

You pick a brick up off the floor. Do you see any flow? See any little arms grabbing the brick? Yet would you agree that brick is in a gravitional field and if you drop it, action happens due to the...
Forum: General Discussion 05-29-2018, 10:40 PM
Replies: 357
Views: 6,136
Posted By bistander
Field

____________________
Forum: General Discussion 05-29-2018, 09:41 PM
Replies: 357
Views: 6,136
Posted By bistander
Magnetic field analogy

Hi itzon,

The relative permeability of steel is about 4000. That means, for equal volumes, steel will have 4000 times less reluctance than air, or the palm of your hand.

And there is no flow...
Showing results 1 to 25 of 1141

 

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