scholarly journals Mechanisms for the attracting acoustic radiation force on a rigid sphere placed freely in a spherical sound field

2004 ◽  
Vol 25 (6) ◽  
pp. 439-445 ◽  
Author(s):  
Tohru Kido ◽  
Takahi Hasegawa ◽  
Naoma Okamura
Keyword(s):  
Acoustic Radiation ◽  
Sound Field ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Rigid Sphere

Acoustic radiation pressure on a rigid sphere in a viscous fluid

1994 ◽  
Vol 447 (1931) ◽  
pp. 447-466 ◽  
Keyword(s):  
Viscous Fluid ◽  
Radiation Pressure ◽  
Special Interest ◽  
Acoustic Radiation ◽  
Sound Field ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Rigid Sphere ◽  
Sphere Radius ◽  
Acoustic Radiation Pressure

The acoustic radiation pressure exerted by an axisymmetric sound field on a rigid sphere suspended freely in a viscous fluid is calculated, the sphere being considered as having an arbitrary radius relative to the sound and viscous wavelengths. The limiting cases of special interest are then investigated, namely, the acoustic radiation force due to a plane progressive and plane standing wave is examined for the limiting cases when the sound wavelength is much more than both the sphere radius and the viscous wavelength and the sphere radius is, in its turn, small or large compared with the viscous wavelength. It is shown that the influence of the viscosity of the fluid surrounding the sphere on the radiation force can be quite considerable in both a quantitative and a qualitative sense. The case of a fastened sphere is also considered.

Acoustic radiation force experienced by a solid cylinder in a plane progressive sound field

1988 ◽  
Vol 83 (5) ◽  
pp. 1770-1775 ◽  
Author(s):  
Takahi Hasegawa ◽  
Kyosuke Saka ◽  
Naoki Inoue ◽  
Kiichiro Matsuzawa
Keyword(s):  
Acoustic Radiation ◽  
Sound Field ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Solid Cylinder

Research on the Non-Contact Manipulation of Biomaterials in the Stationary Sound Field of Ultrasonic Transducers

2007 ◽  
Vol 353-358 ◽  
pp. 3035-3038 ◽  
Author(s):  
Zong Wei Fan ◽  
Keji Yang ◽  
Zi Chen Chen
Keyword(s):  
Acoustic Radiation ◽  
Ultrasonic Transducer ◽  
Sound Field ◽  
Numerical Data ◽  
Radiation Force ◽  
Axial Direction ◽  
Acoustic Radiation Force ◽  
Ultrasonic Transducers ◽  
Lateral Direction ◽  
Trapping Forces

For applying acoustic radiation force to manipulate biomaterials such as cell, DNA, bio-macromolecule without contact, stationary sound field of an ultrasonic transducer was computed numerically. With the numerical data about the sound field, spatial distribution of the acoustic radiation force was analyzed. Besides the radiation force in the axial direction, trapping forces in the lateral direction were discovered. By moving the reflector continuously and carefully, positions of trapping wells were changed simultaneously, as the result, non-contact manipulation of micro cells was implemented.

Acoustic radiation force on a rigid sphere in the near field of a circular piston vibrator

1990 ◽  
Vol 88 (3) ◽  
pp. 1578-1583 ◽  
Author(s):  
Takahi Hasegawa ◽  
Tohru Kido ◽  
Shigeki Takeda ◽  
Naoki Inoue ◽  
Kiichiro Matsuzawa
Keyword(s):  
Acoustic Radiation ◽  
Near Field ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Rigid Sphere
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