Critical sound in fluids and mixtures
The behaviour of sound is explained within the dynamical renormalization group theory. Non-asymptotic effects are due to the deviation of renormalized couplings from their fixed point values. We calculate the temperature and frequency dependence of the sound velocity and absorption near the consol...
Збережено в:
| Видавець: | Інститут фізики конденсованих систем НАН України |
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| Дата: | 1999 |
| Автори: | , |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
1999
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120382 |
| Теги: |
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| Цитувати: | Critical sound in fluids and mixtures / R. Folk, G. Moser // Condensed Matter Physics. — 1999. — Т. 2, № 2(18). — С. 243-254. — Бібліогр.: 25 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The behaviour of sound is explained within the dynamical renormalization
group theory. Non-asymptotic effects are due to the deviation of renormalized couplings from their fixed point values. We calculate the temperature
and frequency dependence of the sound velocity and absorption near the
consolute point and the gas liquid critical point in pure fluids and mixtures.
The critical non-asymptotic time scale in mixtures is different from the pure
fluid case and set by an effective order parameter Onsager coefficient containing the dynamical parameter related to the enhancement of the thermal conductivity. We discuss the relation to the phenomenological theory
of Ferrell and Bhattacharjee for the consolute point and compare with experiments in pure ³He, ⁴He and ³He-⁴He mixtures near the plait point. |
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