Tests have been done in the 60s.
(https://books.google.com/books?hl=en&lr=&id=rNzTBwAAQBAJ&oi=fnd&pg=PA159&ots=IkAp9tmKDY&sig=2vMfeEsut8daKaQUyXdcJx9WcJQ#v=onepage&q&f=false)
Although, that's typical of the theory, there is application magnetically.
>Magnetism is found throughout the Universe. Magnetic fields are known to exist in planets, stars, accretion disks, the interstellar medium, galaxies and in active galactic nulcei (cf. the article on galactic magnetic fields). Often these magnetic fields are generated and maintained by magnetohydrodynamic dynamo action (e.g. the solar dynamo or planetary dynamos, which are described by hydromagnetic dynamo theory), and in many cases the magnetic field is dynamically dominant, determining the evolution of the object.
Topics studied within MHD include typical computational astrophysics topics, such as magneto-convection, MHD turbulence and hydromagnetic dynamo action. Typically, a multitude of intermittent magnetic structures are generated in such systems, e.g. magnetic flux tubes, loops, filaments and arcades. On the Sun and other stars, these magnetic structures may take the form of cool spots (sunspots) and magnetic bright points.
Magnetic structures can store enormous amounts of energy that may be released through reconnection of magnetic field lines (MHD reconnection) leading to solar flares and stellar or even galactic eruptions. It is in this way that the Sun causes storms in the heliospherical magnetic field and ultimately aurorae and space weather.
>In engineering MHD is employed to study, e.g., the magnetic behavior of plasmas in fusion reactors, liquid-metal cooling of nuclear reactors and electromagnetic casting.
>Topics studied within MHD include typical computational astrophysics topics, such as magneto-convection, MHD turbulence and hydromagnetic dynamo action. Typically, a multitude of intermittent magnetic structures are generated in such systems, e.g. magnetic flux tubes, loops, filaments and arcades. On the Sun and other stars, these magnetic structures may take the form of cool spots (sunspots) and magnetic bright points.
>Magnetic structures can store enormous amounts of energy that may be released through reconnection of magnetic field lines (MHD reconnection) leading to solar flares and stellar or even galactic eruptions. It is in >this way that the Sun causes storms in the heliospherical magnetic field and ultimately aurorae and space weather.
reconnection of magnetic field lines (MHD reconnection)
A connector or central powering system that's within range that drives the fuel(lack of? power) economy.
http://www.scholarpedia.org/article/Magnetohydrodynamics
There's space travel relations…
https://www.netl.doe.gov/File%20Library/Events/2014/MHD/2-1-MPGW-NASA-IBlanksonPresentation10012014.pdf
The government really does hide this stuff… And, only release the conventional. Rather than the unconventional as it should… There's much speculation that goes into this, and there's wealth of progress untapped due to the powers that be in our economies.
>the maximum theoretical efficiency would be 90 percent. Allowing for the inefficiencies introduced by finite heat transfer rates and component inefficiencies in real heat engines, a system employing an MHD generator offers the potential of an ultimate efficiency in the range of 60 to 65 percent. This is much better than the 35 to 40 percent efficiency that can be achieved in a modern conventional plant. In addition, MHD generators produce fewer pollutants than conventional plants. However, the higher construction costs of MHD systems have limited their adoption.
In general, it's much very revolutionary even in the layman's perspective which according to word of (http://battista.web.unc.edu/files/2014/02/introMHD.pdf), "Magnetohydrodynamics (MHD) is not a field of study for those with only high school equivalent mathematics and science knowledge… much mathematical rigor to simply understand its governing equations," I apply as layman. Nonchalantly as well. Doesn't quite matter to me in that aspect. I see potential in this that'll solve energy crises old and new.