Modeling of ultrasound transmission through a solid-liquid interface comprising a network of gas pockets

Abstract : Ultrasonic inspection of sodium-cooled fast reactor requires a good acoustic coupling between the transducer and the liquid sodium. Ultrasonic transmission through a solid surface in contact with liquid sodium can be complex due to the presence of microscopic gas pockets entrapped by the surface roughness. Experiments are run using substrates with controlled roughness consisting of a network of holes and a modeling approach is then developed. In this model, a gas pocket stiffness at a partially solid-liquid interface is defined. This stiffness is then used to calculate the transmission coefficient of ultrasound at the entire interface. The gas pocket stiffness has a static, as well as an inertial component, which depends on the ultrasonic frequency and the radiative mass.
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Journal articles
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https://hal.archives-ouvertes.fr/hal-01303224
Contributor : Moysan Joseph <>
Submitted on : Saturday, April 16, 2016 - 11:21:47 PM
Last modification on : Monday, March 4, 2019 - 2:04:22 PM

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Kevin Paumel, Joseph Moysan, Dominique Chatain, G. Corneloup, Francois Baque. Modeling of ultrasound transmission through a solid-liquid interface comprising a network of gas pockets. Journal of Applied Physics, American Institute of Physics, 2011, ⟨10.1063/1.3611422⟩. ⟨hal-01303224⟩

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