title: Ultrasonic cavitation in thin liquid layers.
abstract: The generation of ultrasonic cavitation in a thin liquid layer trapped between a large radiating surface and a hard reflector and bounded laterally by a gas-liquid interface is investigated. The theoretical analysis predicts that a large amplification of the acoustical pressure is obtained with this configuration. Experiments are conducted by driving the layer with horn-type transducers having a large emitting surface. Ultrasonic cavitation is obtained in a broad frequency range at low input intensity due to the amplification effect. Erosion tests on metallic foils demonstrate the existence of a region of intense cavitation activity which can be localised by controlling the input intensity.
authors.affiliation: Institut d'Electronique de Microélectronique et de Nanotechnologie, département ISEN, UMR 8520, 41 boulevard Vauban, 59046 Lille cedex, France.
authors.forename: Alexei
authors.initials: A
authors.lastname: Moussatov
authors.forename: Christian
authors.initials: C
authors.lastname: Granger
authors.forename: Bertrand
authors.initials: B
authors.lastname: Dubus