Accession Number : ADD018408

Title :   Microbubble Positioning and control System.

Descriptive Note : Patent, Filed 28 Jul 95, patented 25 Mar 97,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kuklinski, Robert

Report Date : 25 Mar 1997

Pagination or Media Count : 11

Abstract : A system for positioning and sizing microbubbles in a liquid such as water. A 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 held. 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.

Descriptors :   *CONTROL SYSTEMS, *BUBBLES, *ACOUSTIC SIGNALS, *FLUID DYNAMICS, *PATENTS, NAVAL VESSELS, OCEAN SURFACE, WATER, ACOUSTIC WAVES, TURBULENT BOUNDARY LAYER, REYNOLDS NUMBER, STANDING WAVES

Subject Categories : Marine Engineering
      Acoustic Detection and Detectors
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE