- Tytuł:
- The acoustic excitation of newly-formed bubbles
- Autorzy:
-
Deane, G.
Czerski, H.
Stokes, D. - Powiązania:
- https://bibliotekanauki.pl/articles/331506.pdf
- Data publikacji:
- 2008
- Wydawca:
- Polskie Towarzystwo Akustyczne
- Tematy:
-
gas bubbles
hydroacoustics
natural frequency - Opis:
- Gas bubbles in water act as oscillators with a natural frequency inversely proportional to their radius and a quality factor determined by thermal, radiation, and viscous losses. Newly-formed gas bubbles are excited into breathing mode oscillations immediately after creation, causing them to radiate a pulse of sound. Although the linear dynamics of spherical gas bubbles are well-understood, the mechanism driving the sound production has not been unambiguously identified. Using bubbles released from a nozzle as a model system, it can be shown that sound production is consistant with the rapid change in volume associated with the collapse of an air neck formed immediately after bubble pinch-off. The model is able to adequately describe the production of sound by bubbles released from a nozzle, and can also explain some of the acoustic properties of bubbles fragmenting in fluid turbulence. Laboratory experiments and model calculations of the mechanism are presented. [Work supported by ONR and NSF].
- Źródło:
-
Hydroacoustics; 2008, 11; 71-78
1642-1817 - Pojawia się w:
- Hydroacoustics
- Dostawca treści:
- Biblioteka Nauki
Artykuł