title: Macroscopic acousto-mechanical analogy of a microbubble.
abstract: Microbubbles, either in the form of free gas bubbles surrounded by a fluid or encapsulated bubbles used currently as contrast agents for medical echography, exhibit complex dynamics under specific acoustic excitations. Nonetheless, considering their micron size and the complexity of their interaction phenomenon with ultrasound waves, expensive and complex experiments and/or simulations are required for their analysis. The behavior of a microbubble along its equator can be linked to a system of coupled oscillators. In this study, the oscillatory behavior of a microbubble has been investigated through an acousto-mechanical analogy based on a ring-shaped chain of coupled pendula. Observation of parametric vibration modes of the pendula ring excited at frequencies between 1 and 5 Hz is presented. Simulations have been carried out and show mode mixing phenomena. The relevance of the analogy between a microbubble and the macroscopic acousto-mechanical setup is discussed and suggested as an alternative way to investigate the complexity of microbubble dynamics.
authors.affiliation: UMR Inserm U930, Université François-Rabelais, 10 boulevard Tonnellé, 37032 Tours, France.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Chaline
authors.affiliation: Instituto de Investigación para la Gestión Integrada de Zonas Costeras, Universitat Politècnica de València, Paranimf 1, 46730 Grao de Gandia, Spain.
authors.forename: Noé
authors.initials: N
authors.lastname: Jiménez
authors.affiliation: Instituto de Investigación para la Gestión Integrada de Zonas Costeras, Universitat Politècnica de València, Paranimf 1, 46730 Grao de Gandia, Spain.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Mehrem
authors.affiliation: UMR Inserm U930, Université François-Rabelais, 10 boulevard Tonnellé, 37032 Tours, France.
authors.forename: Ayache
authors.initials: A
authors.lastname: Bouakaz
authors.affiliation: INSA Centre Val de Loire, UMR Inserm U930, Université François-Rabelais, 3 rue de la Chocolaterie CS 23410, F-41034 Blois, France.
authors.forename: Serge
authors.initials: S
authors.lastname: Dos Santos
authors.affiliation: Instituto de Investigación para la Gestión Integrada de Zonas Costeras, Universitat Politècnica de València, Paranimf 1, 46730 Grao de Gandia, Spain.
authors.forename: Víctor J
authors.initials: VJ
authors.lastname: Sánchez-Morcillo
mesh_terms: D000162:Acoustics; D003198:Computer Simulation; D003287:Contrast Media / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D045423:Microbubbles; D015233:Models, Statistical; D009038:Motion; D009991:Oscillometry; D010316:Particle Size; D011312:Pressure; D013499:Surface Properties; D013997:Time Factors; D000069453:Ultrasonic Waves; D014732:Vibration
chemical_list: D003287:Contrast Media; D005740:Gases