PURPOSE: To control the moving velocity and direction of a fluid easily by providing electrodes intersecting perpendicularly to the moving direction of an electrolyte in it and a magnetic field intersecting perpendicularly to the electric and by changing the intensity or direction of the magnetic field.
CONSTITUTION: Electrodes 2,2' are provided intersecting perpendicularly to the moving direction of a fluid in a pass 1 for circulating an electrolyte solution of a fuel cell, and electromagnets 3,3' are provided intersecting perpendicularly to the electric field of electrodes 2, 2' in the external. The fluid is moved to the direction of an arrow 4 by applying positive and negative electric fields on the electrodes 2,2' in the magnetic field provided with N,S-poles, and the moving velocity is increased by intensifying the magnetic field, further more the moving direction of the fluid is reversed by changing the polarity of the electric or magnetic field. Thus the fluid can be moved only in the direction according to Fleming's rule, and the flow can be controlled very easily.
FUKUDA SADAO