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Theses

Coherent interferometric imaging in fluid dynamics

Abstract : The present research is aimed at developing coherent interferometric (CINT) imaging algorithms to localize sources and reflectors in applications involving fluid flows. CINT imaging has been shown to be efficient and statistically stable in quiescent cluttered media where classical imaging techniques, such as Kirchhoff’s migration (KM), may possibly fail due to their lack of statistical robustness. We aim at extending these methods to inhomogeneous moving media, for it has relevance to aero-acoustics, atmospheric and underwater acoustics, infrasound propagation, or even astrophysics. In this thesis report we address both the direct problem of modeling the propagation of acoustic waves in a randomly heterogeneous ambient flow, and the inverse problem of finding the position of sources or reflectors by the CINT algorithm implemented with the traces of the acoustic waves that have travelled through the flow.
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  • HAL Id : tel-02334698, version 2

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Etienne Gay. Coherent interferometric imaging in fluid dynamics. General Mathematics [math.GM]. Université Paris Cité, 2019. English. ⟨NNT : 2019UNIP7029⟩. ⟨tel-02334698v2⟩

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