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 Найдено в других БД:Труды Института высокотемпературной электрохимии УрО РАН (1)
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Поисковый запрос: (<.>K=CAVITATION<.>)
Общее количество найденных документов : 32
Показаны документы с 1 по 10
 1-10    11-20   21-30   31-32 
1.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Cavitation and crystallization in a metastable Lennard-Jones liquid at negative pressures and low temperatures [Electronic resource] / V. G. Baidakov, K. S. Bobrov, A. S. Teterin // Journal of Chemical Physics. - 2011. - Vol.135, №5. - P054512
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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2.
Инвентарный номер: нет.
   
   V 70

    Vinogradov, V. E.
    Cavitation strength of an argon-helium solution / V. E. Vinogradov, P. A. Pavlov, V. G. Baidakov // Chemical Physics Letters. - 2009. - Vol.474, № 4-6. - С. 294-296
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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3.
Инвентарный номер: нет.
   

   
    1/f Fluctuations under acoustic cavitation of liquids / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov, A. V. Vinogradov // Physica A. - 2006. - Vol.364. - С. 63-69
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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4.
Инвентарный номер: нет.
   
   V 70

    Vinogradov, V. E.
    Cavitation strength of water solutions / V. E. Vinogradov, P. A. Pavlov // Journal of Engineering Thermophysics. - 2003. - Vol.11, №4. - С. 353-363
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FLUID CONDITION -- CAVITATION -- WATER

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5.
Инвентарный номер: нет.
   
   V 70

    Vinogradov, V. E.
    Explosive cavitation in superheated liquid argon [Text] / V. E. Vinogradov, P. A. Pavlov, V. G. Baidakov // Journal of Chemical Physics. - 2008. - Vol. 128, № 23. - P234508/1-234508/6
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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6.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Acoustic Cavitation in a Highly Superheat Liquid [Text] / V. G. Baidakov, A. M. Kaverin, V. P. Skripov // Soviet Physics Acoustics-USSR. - 1981. - V.27, Is.5. - P387-390
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
КАВИТАЦИЯ АКУСТИЧЕСКАЯ -- жидкости сильно перегретые

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7.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Boiling-up of superheated liquid argon in an acoustic field / V. G. Baidakov, A. M. Kaverin // Journal of Physics : Condensed Matter. - 2009. - Vol.21, №46. - Article Number 465103
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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8.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Boiling-up of liquid argon at high superheatings under the impact of weak ultrasonic fields / V. G. Baidakov, A. M. Kaverin, V. N. Andbaeva // Thermophysics and Aeromtchanics. - 2011. - Vol.18, №1. - С. 31-36
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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9.
Инвентарный номер: нет.
   
   V 70

    Vinogradov, V. E.
    Cavitation strength of liquids with large molecules [Electronic resource] / V. E. Vinogradov, P. A. Pavlov // International Journal of Modern Physics B. - 2013. - №2. - P1-10
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CAVITATION STRENGTH -- HOMOGENEOUS NUCLEATION THEORY
Аннотация: The cavitation strength of liquids has been studied at atmospheric pressure by applying tensile stress pulses of duration up to 3 μs and amplitude up to 20 MPa within the temperature range from room temperature to the temperature of explosive boiling-up of the liquid. At high temperatures, where in absolute value the tensile strength does not exceed 1-2 times the critical pressure, agreement between classical nucleation theory and experiment is observed within the experimental error. With a decrease of the temperature the tensile strength of the liquid increases, but the experimental values of the breaking strength are lower than those predicted from theory. The dependence of the degree of discrepancy between theory and experiment on the number of atoms in the molecules of the liquids investigated is shown

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10.
Инвентарный номер: нет.
   
   L 95

   
    Low frequency fluctuations of laser beam intensity run through the system of cavitation water clusters [Electronic resource] / V. N. Skokov, V. P. Koverda, A. V. Vinogradov, A. V. Reshetnikov // Thermophysics and Aeromtchanics. - 2010. - Vol.17, №1. - P99-106. - Bibliogr. : p. 106 (21 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ACOUSTIC CAVITATION -- LOW-FREQUENCY PULSATIONS -- POWER SPECTRUM
Аннотация: Experiments on water cavitation in ultrasonic field have been carried out. Low frequency fluctuations of the intensity of laser beam run through the cavitation area have been studied. Experiments have proved presence of low-frequency random fluctuations with frequency dependence of power spectra S ~ 1/ f , α where the exponent α ranged within 0.8 ≤ α ≤ 1.2. From experimental realizations, large-scale low frequency pulsations characterized by scale invariance, which duration is distributed according to the power law, have been distinguished. The results are explained on the basis of mathematical model for the rise of scale invariant fluctuations with 1/ f α power spectrum in the system of two nonlinear stochastic differential equations describing interaction of heterogeneous phase transitions. Distribution of extreme low frequency emissions obtained from numerical solutions to stochastic equations takes the power series form. Correlations of dynamic scaling between critical indicators determining frequency dependence of pulsations power spectra α and distribution functions of extreme low frequency pulsation amplitudes β have been determined. It is shown that both in the experiments on acoustic cavitation of water and in the theoretical model of interacting phase transitions critical indicators are bound with the correlation α + β = 2. Spectra of fluctuation power are determined in the experiments simpler and more accurately than the function of extreme amplitudes distribution. In case when only one frequency dependence of fluctuation capacity spectra is known correlations between indicators serve to obtain information on the distribution of large scale emissions and to estimate critical amplitudes.

\\\\expert2\\NBO\\Thermophysics and Aeromechanics\\2010, V. 17, N 1. P. 99-106.pdf
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