Microbubble positioning and control system

Details Microbubble positioning and control system Microbubble positioning and control system

1995-07-28

1997-03-25

Basinger, Sherman

Ships

Building

Antifriction surfaces

114330, 114337, B63B 138

Patent

active

056134568

ABSTRACT:
A system for positioning and sizing microbubbles in a liquid such as water. first source of acoustic energy produces a first acoustic signal in the liquid, and a second source of acoustic energy produces a second acoustic signal in the liquid. The first and second sources of acoustic energy are positioned and aligned so they produce a standing wave field in the liquid. The standing wave field creates forces which position microbubbles at the antinodes or nodes of the standing wave field. By selecting a frequency for the acoustic signal and a frequency for the second acoustic signal which are slightly different, the standing wave field can cause the positioned microbubbles to move towards or away from a surface region in contact with the liquid.

REFERENCES:
patent: 3827388 (1974-08-01), Fulton
patent: 4398925 (1983-08-01), Trinh et al.
patent: 4429652 (1984-02-01), Stol
patent: 4759775 (1988-07-01), Peterson et al.
patent: 5117882 (1992-06-01), Stanford
patent: 5225089 (1993-07-01), Benes et al.

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