Magnetic fluid rotation system for a cavitation chamber
A system for achieving bubble stability within a cavitation chamber is provided. The system includes an impeller assembly, the impeller assembly having at least one impeller blade located within the cavitation chamber. The impeller assembly is magnetically coupled to an external drive system which is used to rotate the impeller, thereby causing bubbles within the cavitation chamber to move toward the impeller's axis of rotation. As a consequence, the bubbles become more stable. Preferably the axis of rotation of the impeller is positioned in a substantially horizontal plane, thus allowing the rotating impeller to counteract the tendency of the bubbles to drift upward and to accumulate on the upper, inner surfaces of the cavitation chamber. The impeller can be rotated continuously throughout the cavitation process or stopped prior to, or during, bubble cavitation. In the latter scenario, the impeller can be stopped, and if desired locked, at a specific rotational position, thus minimizing possible interference between the impeller and the source of the cavitation energy. The impeller can be shaped to correspond to the inner surface of the cavitation chamber, for example spherically or cylindrically, and can utilize multiple impeller blades.
1. A method for manipulating cavitation bubbles within an enclosed cavitation chamber, comprising:
filling a cavitation chamber with a liquid cavitation medium;
applying an acoustical driver to said cavitation chamber, causing acoustic cavitation within said chamber, and forming a plurality of cavitation bubbles within said liquid cavitation medium;
magnetically coupling an impeller disposed within said chamber to a rotator disposed outside said chamber;
rotating said rotator, causing a corresponding rotation of said magnetically coupled impeller; and
stabilizing said plurality of cavitation bubbles within said liquid cavitation medium through rotation of said liquid cavitation medium about an axis of rotation of said impeller so as to position more than one of said plurality of bubbles substantially along said axis of rotation.
2. The method of claim 1 , said rotating the rotor comprising rotating the rotor at a speed to prevent contact between said cavitation bubbles and an inner surface of said chamber.
3. The method of claim 1 , further comprising confining said cavitation bubbles to an axial region substantially along said axis of rotation.
4. The method of claim 1 , further comprising applying a rotational force to said liquid and said bubbles so as to elongate said bubbles in a direction substantially parallel to said axis of rotation.
5. The method of claim 1 , further comprising driving said cavitation bubbles with acoustic energy to cause an energetic response by said bubbles to said acoustic energy.