Sub-wavelength focusing of acoustic waves in bubbly media
2017 ◽
Vol 473
(2208)
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pp. 20170469
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Keyword(s):
The purpose of this paper is to investigate acoustic wave scattering by a large number of bubbles in a liquid at frequencies near the Minnaert resonance frequency. This bubbly media has been exploited in practice to obtain super-focusing of acoustic waves. Using layer potential techniques, we derive the scattering function for a single spherical bubble excited by an incident wave in the low frequency regime. We then propose a point scatterer approximation for N bubbles, and describe several numerical simulations based on this approximation, that demonstrate the possibility of achieving super-focusing using bubbly media.
1993 ◽
Vol 50
(1)
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pp. 37-44
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2018 ◽
Vol 2018
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pp. 1-7
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Keyword(s):
1990 ◽
Vol 15
(4)
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pp. 361-372
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Keyword(s):
1979 ◽
Vol 66
(2)
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pp. 586-589
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Keyword(s):
1980 ◽
Vol 68
(2)
◽
pp. 686-691
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1991 ◽
Vol 90
(4)
◽
pp. 2118-2123
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1986 ◽
Vol 19
(11)
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pp. 2085-2113
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Keyword(s):