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Radiation force of an arbitrary acoustic beam on an elastic sphere in a fluid
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10.1121/1.4773924
/content/asa/journal/jasa/133/2/10.1121/1.4773924
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/2/10.1121/1.4773924
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Geometry of the problem when the acoustic source has the form of a spherical cap with a circular central opening.

Image of FIG. 2.
FIG. 2.

(Color online) Spatial distributions in the plane of the amplitude of the incident pressure wave (top), the radiation force axial component (middle), and the lateral component (bottom) when the sphere is positioned on the axis for the source shown in Fig. 1 . The image box size is 20 × 10 mm. Note the sphere is included for scale and is not in fact fixed in only the shown position.

Image of FIG. 3.
FIG. 3.

(Color online) Spatial distributions in the plane of the full acoustic pressure at time for different positions of the 2-mm spherical stone. The lateral coordinate of the stone center is marked in the left-upper corner of each image, and the colors denote pressure magnitudes. An arrow shows the radiation force direction and relative magnitude. The image box size is 20 × 10 mm. The incident beam axis is directed to the right.

Image of FIG. 4.
FIG. 4.

Axial distribution of pressure amplitude (top) and normalized radiation force for different radii of the scatterer. Solid lines represent calculations based on the full model, while dotted lines correspond to the low-frequency approximation, Eq. (85) .

Image of FIG. 5.
FIG. 5.

Geometry of the problem in the case of a linear array source. The focal point can be steered within the imaging plane y = 0.

Image of FIG. 6.
FIG. 6.

(Color online) Spatial distributions in the plane (left column) and plane (right column) of the amplitude of the incident pressure wave (upper), the radiation force axial component (center), and lateral component (lower left) and (lower right) for the 5-MHz source shown in Fig. 5 . The target diameter 2  = 2 mm is shown by the dotted white circles in the top plots. The image box size is 6 × 4 mm.

Image of FIG. 7.
FIG. 7.

(Color online) Spatial distribution in the plane of the radiation force for the same parameters used in Fig. 6 . The force magnitude is plotted by color. The force direction is shown by the white arrows.

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/content/asa/journal/jasa/133/2/10.1121/1.4773924
2013-01-30
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Radiation force of an arbitrary acoustic beam on an elastic sphere in a fluid
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/2/10.1121/1.4773924
10.1121/1.4773924
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