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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 |
Broad lines of the noise spectrum merge in transition of chaotic bubble oscillations to periodic ones
G.A. Druzhinin, T.A. Dogadaeva
Department of Physics, St.Petersburg State University, St. Petersburg, St. Peterhof, 198504 RussiaNumerical solutions of the Rayleigh-Plesset equation of gas bubble pulsations under slow increasing pressure amplitude of acoustic pump wave were thoroughly investigated. 3D diagrams of transformation of discrete spectrum of periodic pulsations in a continuous spectrum with broad spectral lines have been obtained. Dynamics of behavior of these broad lines and of conversion of continuous spectrum in a discrete one at the confluence of these broad lines has been investigated. Spectra that corresponded to almost periodic oscillations were detected and subharmonics under 1/8 were found.
| URL: | http://uzmu.phys.sunmarket.com/abstract/2014/5/145312 |
| PACS: | 43.25.Yw Nonlinear acoustics of bubbly liquids 47.52.+j Chaos in fluid dynamics |
| UDC: | УДК: 534-143 |
| Цитата: | Г.А. Дружинин, Т.А. Догадаева. Слияние широких линий шумового спектра при переходе хаотических пульсаций газовых пузырьков в периодические // Учен. зап. физ. фак-та Моск. ун-та. 2014. № 5. 145312 |