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Общее количество найденных документов : 32
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1.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V.G., Kaverin A.M., Skripov V.P.
Заглавие : Acoustic Cavitation in a Highly Superheat Liquid
Место публикации : Soviet Physics Acoustics-USSR. - 1981. - V.27, Is.5. - С. 387-390
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): кавитация акустическая--жидкости сильно перегретые
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2.

Вид документа : Статья из журнала
Шифр издания : 53/V 70
Автор(ы) : Vinogradov V. E., Pavlov P. A., Baidakov V. G.
Заглавие : Explosive cavitation in superheated liquid argon
Место публикации : Journal of Chemical Physics. - 2008. - Vol. 128, № 23. - С. 234508/1-234508/6
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): argon
Аннотация: The kinetics of explosive boiling-up of liquid argon has been investigated at negative pressures created by the reflection of a compression pulse 3–5 µs long from the free surface of a liquid by the method of liquid pulse heating on a thin platinum wire (with a rate of temperature increase of about 1 K/µs). The limiting superheats T* (stretches p*), the effective nucleation rate J*, and the derivative GT=(d ln J/dT)T=T* have been determined by experimental data on the thermal perturbation of a wire probe and the results of solution of the problem on the initial stage of explosive boiling-up of a liquid. The experimental data are compared with homogeneous nucleation theory.
\\\\Expert2\\nbo\\Journal of Chemical Physics\\2008, v.128, p.234508.pdf
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3.

Вид документа :
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Kaverin A. M., Andbaeva V. N.
Заглавие : Boiling-up of liquid argon at high superheatings under the impact of weak ultrasonic fields
Место публикации : Thermophysics and Aeromtchanics. - 2011. - Vol.18, №1. - С. 31-36
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): nucleation --krypton
Аннотация: The technique of lifetime measurement for metastable liquid and continuous depressurization technique were applied for study of kinetics of spontaneous cavitation in superheated liquid argon under impact of weak ultrasonic fields. It was demonstrated that acoustic cavitation may occur through the mechanism of homogeneous generation of vapor phase or through "swinging" of vapor bubbles generated by high-energy particles and/or other kinds of initiative factors. The thresholds of acoustic cavitation are described by the theory of homogeneous nucleation
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4.

Вид документа :
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Kaverin A. M.
Заглавие : Boiling-up of superheated liquid argon in an acoustic field
Место публикации : Journal of Physics : Condensed Matter. - 2009. - Vol.21, №46. - С. Article Number 465103
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): nucleation -- state
Аннотация: The method of lifetime measurement has been used to investigate spontaneous cavitation kinetics in superheated liquid argon in weak acoustic fields. It is shown that acoustic cavitation may proceed both by the mechanism of homogeneous nucleation of the vapor phase and by way of 'build-up' of vapor bubbles generated by high-energy particles or the action of some other external factor. Acoustic cavitation thresholds are adequately described by homogeneous nucleation theory
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5.

Вид документа :
Шифр издания : 53/V 70
Автор(ы) : Vinogradov V. E., Pavlov P. A., Baidakov V. G.
Заглавие : Cavitation strength of an argon-helium solution
Место публикации : Chemical Physics Letters. - 2009. - Vol.474, № 4-6. - С. 294-296
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): explosive cavitation --helium-saturated liquid --thin platinum
Аннотация: The kinetics of explosive cavitation has been studied by experiment in helium-saturated liquid argon. Measurements have been made by the method of pulse heating of a solution on a thin platinum wire in a negative-pressure wave. The temperature dependence of cavitation strength has been traced, the effective values of the nucleation rate J and the derivative dlnJ/dT have been determined. It has been found that the dissolution of helium results in decreasing cavitation strength of argon. Satisfactory agreement between data of homogeneous nucleation theory and experiment with the use of capillarity approximation in the latter, though limiting stretches (superheats) attained by experiment are nevertheless systematically lower than calculated ones
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6.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Bobrov K. S., Teterin A.S.
Заглавие : Cavitation and crystallization in a metastable Lennard-Jones liquid at negative pressures and low temperatures
Место публикации : Journal of Chemical Physics. - 2011. - Vol.135, №5. - С. 054512
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): solid-liquids --liquids--lennard-jones
Аннотация: Molecular dynamics simulations have been used to investigate the kinetics of spontaneous cavitation and crystallization in a Lennard-Jones liquid at negative pressures in the temperature range where these processes compete with each other. The nucleation rate has been calculated in NVE and NpT ensembles by the method of mean lifetime and the transition interface sampling method with parallel path swapping. The data obtained have been used to determine in the framework of classical nucleation theory the value of the ratio of the solid–liquid and the liquid–void interfacial free energy for critical crystals and cavities and the values of their volumes at points where the cavitation rate of the liquid is equal to the rate of its crystallization
\\\\Expert2\\nbo\\Journal of Chemical Physics\\2011, v.135, p.054512.pdf
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7.

Вид документа :
Шифр издания : 53/V 70
Автор(ы) : Vinogradov V. E., Pavlov P. A.
Заглавие : Cavitation strength of water solutions
Место публикации : Journal of Engineering Thermophysics. - 2003. - Vol.11, №4. - С. 353-363
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): fluid condition--cavitation-- water
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8.

Вид документа :
Шифр издания : 53
Автор(ы) : Skokov V. N., Koverda V. P., Reshetnikov A. V., Vinogradov A. V.
Заглавие : 1/f Fluctuations under acoustic cavitation of liquids
Место публикации : Physica A. - 2006. - Vol.364. - С. 63-69
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): self-organized criticality--acoustic cavitation--nonequilibrium conditions
Аннотация: A regime of a generation of fluctuations with 1/f power spectra under cavitation of liquids in an ultrasonic field has been found experimentally. The acoustic cavitation is accompanied by the formation of various spatial structures and scale-invariant distribution functions of fluctuations. It has been shown that local fluctuations can have non-Gaussian distribution. A two-dimensional distributed parameter system of stochastic equations describing interacting nonequilibrium phase transitions has been investigated numerically. It has been shown that the system in a wide range of changing initial conditions and the intensity of external noise is characterized by the 1/f behavior of power spectra and scale-invariant distribution functions of fluctuations. The results of numerical simulation agree qualitatively with the experimental data
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9.

Вид документа :
Шифр издания : 53/K 79
Автор(ы) : Koverda V. P., Skokov V. N., Reshetnikov A. V.
Заглавие : Statistics of low-frequency pulsations in critical regimes of heat mass exchange with phase transitions
Место публикации : Journal of Engineering Thermophysics. - 2007. - Vol.16, №3. - С. 130 -138
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): fluctuation--irregular high-energy --1 / f спектры
Аннотация: Experimental investigation of fluctuation dynamics in critical and transitional modes of heat mass exchange shows existence of irregular high-energy pulsations with power spectrum inversely proportional to the frequency—so called 1/f spectrum. Such regimes are characterized by the fact that an essential part of the pulsations energy is connected with very slow processes and mean that large high-energy bursts are possible in the system. Another characteristic feature of such regimes is scale invariance of the fluctuations distribution function. According to the theory, the 1/f fluctuations can emerge in physical systems due to simultaneous phase transitions in presence of sufficiently intensive white noise. This paper is devoted to detailed investigation of relaxation processes at steadying of stationary stochastic process in non-equilibrium phase transitions in system of two nonlinear stochastic differential equation. Such an information reveals statistical patterns of particular large-scale low-frequency bursts. Discontinuous “forgetting” of the initial conditions takes place. It is shown by numerical methods that distributions of duration and maximal values of the low-frequency extreme bursts have the power-like form. Experimental investigation results of statistical characteristics of fluctuation processes at ultrasonic cavitation and flash boiling of overheated water jets are presented. Results of the experiments carried out fit conclusions of the theoretical model for interacting heterogeneous phase transitions
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10.

Вид документа :
Шифр издания : 53/V 70
Автор(ы) : Vinogradov A. V.
Заглавие : Spectral Characteristics of Fluctuations in Ultrasonic Cavitation of Water and Glycerin
Место публикации : Heat Transfer Research. - 2008. - Vol.39, №6. - С. 519-527
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): fluctuation--acoustic cavitation--glycerin
Аннотация: The results of experimental investigation of the dynamics of fluctuations in acoustic cavitation of water and glycerin are presented. Near the radiator surface the structures in interacting vapor-gas bubbles having the form of fractal clusters were formed. Using the method of photometric scanning of transmitted laser radiation, the dynamics of fluctuations was investigated. In the transient regime the range of the power of fluctuations changed inversely proportional to frequency. The distributions of local fluctuations differ from Gaussian ones and reveal the properties of scale invariance. The qualitative behavior of the frequency dependence of the spectral density of fluctuations on change in the power of an ultrasonic radiator was investigated. It is shown that the raise of the high-frequency boundary of the flicker behavior point to the buildup of instability and may serve as a precursor of possible large-scale overshoots
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