The electromagnetic force drives magneto hydrodynamic flow between the cylinders, a few years later we designed similar generator to and created a mathematical model for generator . In internal cylinder parallel to the axis are placed metal conductors-electrodes of the forms of bars. Those conductors the alternating current is connected. The water is weakly electrically conducting liquid (electrolyte). This is the mathematical model of one device for electrical energy produced by alternating current in production of heat energy.