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Modeling of ultrasound transmission through a solid-liquid interface comprising a network of gas pockets
Author(s) -
K. Paumel,
J. Moysan,
D. Chatain,
G. Corneloup,
François Baqué
Publication year - 2011
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.3611422
Subject(s) - ultrasonic sensor , materials science , stiffness , ultrasound , coupling (piping) , acoustics , interface (matter) , transmission (telecommunications) , transducer , surface roughness , surface finish , composite material , contact angle , physics , engineering , sessile drop technique , electrical engineering
International audienceUltrasonic 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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