The airbubble in the magnetic fluid - what if?

[Low-Q]

Hi,

I have no drawing here, but imagine this:

I have a container half full of magnetic fluid. It just floats in there like water. If I put a straw into the fluid, and make bubbles, the bubbles will rise straight upwards.

What if I put a strong magnet on the side of the container, and the magnetic fluid will float towards the magnet so the fluid level is higher close to the magnet than the opposite side.

Then I again put my straw in the fluid and make bubbles. Will the bubbles go stright upwards, or will the bubble rise upwards in an angle away from the magnetic field?

That is my $1000 question for today

Br.

Vidar

[shruggedatlas]

Hi,

I have no drawing here, but imagine this:

I have a container half full of magnetic fluid. It just floats in there like water. If I put a straw into the fluid, and make bubbles, the bubbles will rise straight upwards.

What if I put a strong magnet on the side of the container, and the magnetic fluid will float towards the magnet so the fluid level is higher close to the magnet than the opposite side.

Then I again put my straw in the fluid and make bubbles. Will the bubbles go stright upwards, or will the bubble rise upwards in an angle away from the magnetic field?

That is my $1000 question for today

Br.

Vidar

My guess is the air bubble will angle away from the magnet.  The air bubble will take the path of least resistance, and since the water pressure is heavier toward the magnet, the bubble should in theory want to get away from the magnet, while still traveling upward.

If this was a gravity free environment, the bubble would travel directly away from the magnet, but since there are two forces still in play, it would choose a diagonal that minimizes the fluid pressure.

[gravityblock]

Vidar,

A magnetic fluid hardens in the presence of a magnetic field.  I don't think you would be able to blow bubbles in a solid like fluid.  A magnetic fluid attracts to a magnet with either pole, similar to a metal piece. 

If you was blowing bubbles far enough away from the magnetic field where the fluid was still in liquid form, then the bubbles would be outside the influence of the magnetic field and would behave as if the magnet wasn't there.

Here's a video of a magnet confining a ferromagnetic fluid while without the magnet it will pour.  http://www.freesciencelectures.com/video/ferromagnetic-liquid/


GB

[Low-Q]

I have heard that ferromagntetic fluid still feel liquid when you put your finger on it, even though it seems to be solid in a precense of a magnet. Have you guys experimented with ferrofluids, so you know it hardens in the precense of a magnet? According to experiments I have read about, it does not feel solid with a magnet in precense. Something like this: "Even though the spikes look solid, you can still let your finger go straight through it as in a liquid". Sounds promising, but I also think the bubble will try to escape the magnetic field. I was hoping not, because then it would be possible to make a real unbalanced buoyancy wheel

Yesterday I bought 120g on ebay (Those fluids are quite expencive - 60 dollars for 120g ). So when it arrives I will play a little with it and see what I find out - you know, too curious to let go

[FatChance!!!]

How will this translate into an overunity device?