The MHD (magnetohydrodynamic) dynamo is a fluid example of a dynamo, or electrical generator. The basic concept underlying the mechanical and fluid dynamos is the same. The fluid dynamo, however, uses the motion of fluid to generate the currents which generate the electrical energy. The mechanical dynamo, in contrast, uses the motion of mechanical devices to accomplish this.
The geophysics and astrophysics communities also have an interest in the MHD dynamo, since it is proposed to be the cause of most geophysical and astrophysical magnetic fields.
The MHDdynamo is an active area of research in plasma physics.
The geophysics and astrophysics communities also have an interest in the MHDdynamo, since it is proposed to be the cause of most geophysical and astrophysical magnetic fields.
Dynamo effect of a helical flow with a superimposed turbulence in a cylinder, R.
The screw dynamo or so-called Ponomorenko dynamo is able to generate a non-axisymmetric magnetic field in an axisymmetric helical flow and is one of the simplest known dynamo models.
Starting from a fluid motion capable of dynamo action and a weak magnetic field it was observed that the growing magnetic field destroys the dynamo property of the motion and then decays, and that the system ends up in a state with another motion incapable of dynamo action and zero magnetic field.
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