2020/07/08 by Ion Simaciu, Gheorghe Dumitrescu, Simaciu, Ion +5
Earth and Planetary Sciences · Environmental Science · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Methane Hydrates and Related Phenomena #Underwater Acoustics Research
paper · pdf · doi:10.48550/arxiv.2007.04067
openalex publication_date 2020/07/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, it is shown that in interaction with an oscillating bubbles cluster the fluid becomes inhomogeneous. The radial variation of the acoustic refractive index of the fluid generates an acoustic lens with spherical symmetry. When the focal length of the lens associated with the bubbles cluster is equal to the length of the position vector then the bubbles cluster behaves like a dumb hole. Unlike the properties of a bubble, the cluster, by compression under the action of attractive internal forces, can shrink its radius to become a dumb hole.