Electro/Magnetically induced rotation Electro/Magnetically induced rotation

  • Introduction

The rotational behaviour of an electrically conductive liquid under the application of external electro/magnetic fields with different configurations have been studied. A simple theoritical basis supports the experimental setups in which we have observed the effect of rotational forces in a fluid.

The theoretical basis suggest three general cases:

1.  A constant electric field perpendicular to electric current, while magnetic field is absent. (has been reported in water film, polar liquids and liquid crystals.)

 

2.  A constant magnetic field is applied on a non-uniform electric current. The fluid rotates in the direction of (B.Del)J.

Cylinderical Frame
Movie #1

 

 3.  A non-uniform magnetic field is applied on a constant electric current. The fluid rotates in the direction of (J.Del)B.

Cubic Frame
Movie #2

 

  • Control of rotation

The direction of rotation can be controlled by changing the direction of electric current.

Movie #3 Movie #4
  • An application: Mixing

 

Movie #5