Investigation of the robustness of time reversal acoustics in solid media through the reconstruction of temporally symmetric sources

Griffa, Michele; Anderson, Brian E.; Guyer, R. A.; Ulrich, Timothy J.; Johnson, P. A.

doi:10.1088/0022-3727/41/8/085415

Cited by 23 publications

(18 citation statements)

References 70 publications

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“…The effects of the finite size of a transducer used in a TRM on the TR process has been observed previously by Griffa et al, 12 though this was not the focus of their work. Their work presented observations from two 2D numerical examples that employed a single channel TRM transducer of two different lengths d 1 =k ¼ 1:69, and d 2 =k ¼ 0:18, where d is the transducer length and k is the wavelength.…”

Section: Introductionmentioning

confidence: 76%

Time reversal reconstruction of finite sized sources in elastic media

Anderson

Griffa²,

Ulrich³

et al. 2011

The Journal of the Acoustical Society of America

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The ability of the time reversal process to reconstruct sources of finite size relative to a wavelength is investigated. Specifically the quality of the spatial reconstruction of a finite sized source will be presented through the use of time reversal experiments conducted on an aluminum plate. The data presented in the paper show that time reversal can reconstruct a source equally well regarding less of its size, when the source is a half wavelength or less in size. The quality of spatial reconstruction when the source is larger than a half wavelength progressively decreases with the size of the source.

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Section: Introductionmentioning

confidence: 76%

Time reversal reconstruction of finite sized sources in elastic media

Anderson

Griffa²,

Ulrich³

et al. 2011

The Journal of the Acoustical Society of America

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“…Following the laboratory experiments by Griffa et al (2008) that conclude that a small dissipation alters the recovery of the initial data, but not the retro-focusing of the sound waves, we present here a stable time reversing scheme for the BFLBM. The basic idea is to use the time forward …”

Section: Stable Time Reversing Of the Bflbmmentioning

confidence: 99%

Noise source identification with the lattice Boltzmann method

Vergnault

Malaspinas

Sagaut

2013

The Journal of the Acoustical Society of America

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In this paper the sound source identification problem is addressed with the use of the lattice Boltzmann method. To this aim, a time-reversed problem coupled to a complex differentiation method is used. In order to circumvent the inherent instability of the time-reversed lattice Boltzmann scheme, a method based on a split of the lattice Boltzmann equation into a mean and a perturbation component is used. Lattice Boltzmann method formulation around an arbitrary base flow is recalled and specific applications to acoustics are presented. The implementation of the noise source detection method for two-dimensional weakly compressible (low Mach number) flows is discussed, and the applicability of the method is demonstrated.

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“…The physics of the RTM algorithm is based on the principle of Time Reversal of waves investigated extensively by Fink et al [27][28][29][30][31][32][33] and others [34][35][36][37]. In physical time reversal, the medium is first excited with ultrasound and the field scattered by an internal object is recorded by a receiver array.…”

Section: Introductionmentioning

confidence: 99%