EM question

[Wx4caster]

Would it be possible for a sphere of ferrous liquid to be wrapped in wire mich like an electromagnet? Would that not cause motions and density waves that would create outward forces? Im EM Illiterate...

[AfterViewer]

Not sure that would create anything above and beyond the standard magnetic field of the solid core. The Earth is a good example of a thin crust revolving on a molten viscous outer core as an EM generator.

[Wx4caster]

True... but...How and where would magnetic polarity develop? Because the liquid inside would churn and there would be outward inertial forces or centripital forces that would not be evenly distributed. therefore if forces are not equal...

 

Shouldnt it move?

[Enthalpy]

Ferromagnetic liquids exist. Not iron because it loses its property before melting, but magnetic particles suspended in a liquid behave like a ferromagnetic liquid.

 

These behave a bit like solids, but are more complicated because of the allowed movements.

 

From a static magnetic field and a steady liquid, I expect exactly zero effect. Earth is a different case, because it rotates, and has convection movements.

 

A magnetic field evolving would act mechanically on a conductive liquid. It would repel it, and the induced current would let the liquid rotate - but significant effects are difficult to obtain. Efficient magnetic-to-mechanic effect needs to design a proper electric motor; they work very well but needed one century to develop.