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Updated: Mar 5, 2026
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
Ultrasonic subwavelength phase conjugated mirror with a layer of bubbles
O Lombard1, C Barrière2, V Leroy1
1Laboratoire Matière et Systèmes Complexes, Universitè Paris-Diderot, CNRS (UMR 7057), Paris, France.
Abstract:
A single layer of gas bubbles in a yield-stress fluid is experimentally shown to behave as a phase-conjugated (PC) mirror with a thickness 250 times smaller than the wavelength (0.14mm-diameter bubbles for phase-conjugation at 40kHz). A high amplitude pump wave at frequency 80kHz interacts with a lower amplitude probe wave centered at 40kHz. A PC-reflection coefficient of 0.15 is obtained for a 50kPa pump. A perturbative second-order theory is shown to quantitatively describe the experimental observations.
