VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Iterative modelling of sound field and bubble distribution in acoustic cavitation [Elektronski vir]
    Stephens, Dwayne Savio ; Rosselló, Juan Manuel ; Mettin, Robert
    Acoustic cavitation is the nucleation and dynamics of bubbles in strong sound fields in liquids. When bubbles occur, they are driven by acoustic (Bjerknes) forces to move in space, arrange in ... structures, and potentially merge. On the other hand, the presence of gaseous voids can have significant influence on the sound propagation in the liquid, and thus can alter the acoustic field. Since the bubble motion and distribution depends on the field properties, the mutual interaction of bubbles and field might result in a complicated evolution. Here we present a numerical model to capture essentials of this coupling. An iterative scheme alternately determines for a time step the bubble motion on basis of discrete particles, and adapts the continuous pressure field via solving a modified Helmholtz equation. The field equation is based on the model by Louisnard which takes into account nonlinear oscillations and damping of the bubbles. The discrete bubble population is included as a smeared-out bubble density. The numerical method is applied to the temporal evolution of an ensemble of bubbles seeded by a laser pulse in concentrated phosphoric acid driven by an ultrasonic standing wave field.
    Vir: DAGA 2021 [Elektronski vir] : 47. Jahrestagung für Akustik, 15. - 18. August 2021, Wien und Online : tagungsband (Str. [1])
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2021
    Jezik - angleški
    COBISS.SI-ID - 189071875

    Povezava(-e):

    https://pub.dega-akustik.de/DAGA_2021/data/bydate.html#R204

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