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Title: Cylindrical acoustic levitator/concentrator

Abstract

A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow cylindrical piezoelectric crystal which has been modified to tune the resonance frequency of the breathing mode resonance of the crystal to that of the interior cavity of the cylinder. When the resonance frequency of the interior cylindrical cavity is matched to the breathing mode resonance of the cylindrical piezoelectric transducer, the acoustic efficiency for establishing a standing wave pattern in the cavity is high. The cylinder does not require accurate alignment of a resonant cavity. Water droplets having diameters greater than 1 mm have been levitated against the force of gravity using; less than 1 W of input electrical power. Concentration of aerosol particles in air is also demonstrated.

Inventors:
 [1];  [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
874817
Patent Number(s):
6467350
Assignee:
The Regents of the University of California (Los Almos, NM)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
cylindrical; acoustic; levitatorconcentrator; low-power; inexpensive; apparatus; levitation; andor; concentration; aerosols; liquidsolid; samples; particulates; millimeters; diameter; air; fluids; described; constructed; commercially; available; hollow; piezoelectric; crystal; modified; tune; resonance; frequency; breathing; mode; interior; cavity; cylinder; matched; transducer; efficiency; establishing; standing; wave; pattern; require; accurate; alignment; resonant; water; droplets; diameters; levitated; force; gravity; input; electrical; power; aerosol; particles; demonstrated; electrical power; resonance frequency; solid sample; /73/210/

Citation Formats

Kaduchak, Gregory, and Sinha, Dipen N. Cylindrical acoustic levitator/concentrator. United States: N. p., 2002. Web.
Kaduchak, Gregory, & Sinha, Dipen N. Cylindrical acoustic levitator/concentrator. United States.
Kaduchak, Gregory, and Sinha, Dipen N. Tue . "Cylindrical acoustic levitator/concentrator". United States. https://www.osti.gov/servlets/purl/874817.
@article{osti_874817,
title = {Cylindrical acoustic levitator/concentrator},
author = {Kaduchak, Gregory and Sinha, Dipen N},
abstractNote = {A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow cylindrical piezoelectric crystal which has been modified to tune the resonance frequency of the breathing mode resonance of the crystal to that of the interior cavity of the cylinder. When the resonance frequency of the interior cylindrical cavity is matched to the breathing mode resonance of the cylindrical piezoelectric transducer, the acoustic efficiency for establishing a standing wave pattern in the cavity is high. The cylinder does not require accurate alignment of a resonant cavity. Water droplets having diameters greater than 1 mm have been levitated against the force of gravity using; less than 1 W of input electrical power. Concentration of aerosol particles in air is also demonstrated.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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Works referenced in this record:

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conference, January 1983


Acoustic radiation potential on a sphere in plane, cylindrical, and spherical standing wave fields
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Compact acoustic levitation device for studies in fluid dynamics and material science in the laboratory and microgravity
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