Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Bubble nucleation in a superfluid ³He–⁴He mixture induced by acoustic wave
Репозиторій DSpace/Manakin
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Bubble nucleation in a superfluid ³He–⁴He mixture induced by acoustic wave
Тема:
Жидкий гелий
Інший ID:
PACS: 67.60.G-;67.60.Fp;62.60.+v
Посилання:
Bubble nucleation in a superfluid ³He–⁴He mixture
induced by acoustic wave
/ H. Abe, Y. Saitoh, T. Ueda, R. Nomura, Y. Okuda, S.N. Burmistrov // Физика низких температур. — 2008. — Т. 34, № 4-5. — С. 391–394. — Бібліогр.: 16 назв. — англ.
Підтримка:
This study was supported by the Fumi Yamamura Memorial Foundation for Female Natural Scientists and in part by the Ground-based Research Announcement for Space Utilization promoted by the Japan Space Forum, and Grant-in-Aid for Scientific Research on Priority Areas (Grant No. 17071004) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
Дата:
2008
Переглядів:
860
Завантажень:
569
Анотація:
We report the nucleation dynamics of bubbles induced by an acoustic wave pulse in ³He–⁴He liquid mixtures.
The experiment was performed for the mixture with ³He fixed concentrations of about 4% and 25%
and the pure superfluid ⁴He. When a pulse of 1 ms duration was applied to the mixture at the saturated vapor
pressure, a spherical bubble was nucleated on the active area of a piezoelectric transducer. For the case of
pure ⁴He, not a spherically shaped bubble, but an irregularly shaped, larger one was observed. We took pictures
with a high speed CCD camera of the bubble expansion and contraction motions after the nucleation.
We also investigated the temperature dependence of the bubble nucleation by changing the acoustic wave
power. The results show that the nucleation and growth dynamics of a cavitation bubble depend greatly on
the ³He concentration and temperature.
