Separating Liquids with an Electromagnetic Field

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SUMMARY

The discussion centers on the feasibility of using an electromagnetic field to separate two liquids, specifically petrol and water, based on their differing magnetic properties. Participants highlight that while traditional methods like centrifugation are more efficient due to density differences, magnetohydrodynamics offers a theoretical approach to liquid separation. The conversation also touches on the application of these principles in submarine design to reduce noise, suggesting innovative structural designs to enhance sound insulation.

PREREQUISITES
  • Understanding of magnetohydrodynamics principles
  • Knowledge of centrifuge operation and efficiency
  • Familiarity with the magnetic properties of liquids
  • Basic concepts of submarine design and acoustics
NEXT STEPS
  • Research magnetohydrodynamics applications in liquid separation
  • Explore advanced centrifuge technologies for large-scale operations
  • Investigate the magnetic properties of various liquids
  • Study submarine design innovations for noise reduction
USEFUL FOR

Engineers, researchers in fluid dynamics, environmental scientists addressing oil spill cleanup, and naval architects focused on submarine acoustics.

bishwa
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can't an electro-magnetic field be used to separate two liquids?
For example: petrol and water(as they have different magnetic properties)

i'd be grateful if someone helps me with this.
 
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Things like this usually require more energy than is feasible. But, perhaps in some cases it is possible and is even done. You might check into magnetohydrodynamics for related discussions.
 
How about a centrifuge?
(BTW, those usually use magnetic fields to spin the motor.) But it's much easier because you rely on the difference in density instead of the difference in electro-magnetic properties.
 
centrifuge can ofcourse an easier solution but it cannot be used efficiently when the amount considered is very large.Ive been doing some studies on magnetohydrodynamics(thanks Ivan for that was the first time i'd heard about it).
 
I wonder how you could make a submarine really quiet? Hmmm.
 
Originally posted by bishwa
centrifuge can ofcourse an easier solution but it cannot be used efficiently when the amount considered is very large.
Are you looking for a better way to clean up major oil spills on the ocean?

ivan seeking said:
I wonder how you could make a submarine really quiet? Hmmm.
Seems off topic, but I'll bite.
How about if you make your sub with 2 hulls, a thick one outside for the pressure and armor, and an inside skin with a gap between the two. You create a vacuum between the two skins with any supports or transmissions made with an ultra-rigid material. That way the vacuum can't propagate any internal sounds and the ultra-rigid material doesn't vibrate. I'll leave it up to you to design this ultra-rigid, non vibratable material.
 
Originally posted by J-Man
Seems off topic...
Not at all. I dare say no more. :smile:
 

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