|
|
|
Science Newsletter of the Faculty fo Physics
This is a new bulletin, which, as we hope, will bring fresh, updated information on scientific news, research activities, and related events in the life of our department to our staff members, undegraduate and graduate students, postdocs, collaborators and partners. We greatly hope that this Science Newsletter will help us to find new partners in research and shorten the way from fundamental research to applications and innovations, from our fundamental discoveries to their successful implementations in not too distant future.
XIV National School-Seminar "Wave phenomena in inhomogeneous media"
The conference papers from the School-Seminar «Waves-2014» will be submitted for publishing in the Memoirs of the Faculty of Physics journal.
| Journals » Memoirs of the Faculty of Physics » Issues » 2014 » # 5 |
On the nonlinear acoustic characteristics of a crystallizing liquids
V.A. Bulanov
V.I.Ilyichev Pacific Oceanological Institute Far Eastern Branch of the Russian Academy of Sciences. Russia, 690041, Vladivostok, Baltic street, 43Results of theoretical researches of nonlinear propagation of a sound in the crystallizing liquid containing the crystallization centers are presented. The abnormal behaviour of frequency and concentration dependences of the parameter of the acoustic nonlinearity, essentially differing on the character from those in case of a liquid with particles without phase transformations is revealed. It is shown, that phase transformations make strong influence on dynamics of the crystallization centers with the sizes, characteristic for experiments with crystallizing liquids in porous environments in which anomalies in behaviour of absorption and a dispersion of sound speed have been earlier experimentally established at crystallization and melting. It is shown, that feature of the parameter of acoustic nonlinearity in crystallizing water at monodisperse crystallization centers is sharp nonlinearity increase at the small sizes from ten to hundred nanometers. It is noticed, that the important feature is the failure at the sizes in some hundreds nanometers when compressibility of crystallization center owing to phase transformations become negative. Nevertheless, as a whole phase transformations increase acoustic nonlinearity of crystallizing liquids. It is revealed, that the most considerable influence of phase transformations is observed on rather low frequencies and at the small sizes of the crystallization centers.
| URL: | http://uzmu.phys.sunmarket.com/abstract/2014/5/145310 |
| PACS: | 43.25.+y Nonlinear acoustics 64.60.Q- Nucleation |
| UDC: | 534.2 |
| Цитата: | В.А. Буланов. О нелинейных акустических характеристиках кристаллизующейся жидкости // Учен. зап. физ. фак-та Моск. ун-та. 2014. № 5. 145310 |