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1.

Вид документа : Статья из журнала
Шифр издания : 53/T 82
Автор(ы) : Reshetnikov A. V., Busov K. A., Mazheiko N. A., Skokov V. N., Koverda V. P.
Заглавие : Transient behavior of superheated water jets boiling
Место публикации : Thermophysics and Aeromtchanics. - 2012. - Vol.19, №2. - С. 329-336
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): 1/f fluctuations--jet forms--nucleation frequency
Аннотация: Superheated water flowing out from high-pressure chamber through short cylindrical and slot channel has been studied experimentally. Relation of vaporization mechanisms in superheated liquid (boiling in single, not interacting centers, intense heterogeneous vaporization, and homogeneous fluctuating nucleation) and respective forms of superheated water jets has been determined. Temperature intervals with transient behavior of boiling have been determined. It is shown that at transient behavior of boiling the amplitude of pulsations of jet parameters increases, and in the spectra of pulsation power, the low-frequency component 1/f appears
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2.

Вид документа : Статья из журнала
Шифр издания : 53/T 82
Автор(ы) : Reshetnikov A. V., Busov K. A., Mazheiko N. A., Skokov V. N., Koverda V. P.
Заглавие : Transient behavior of superheated water jets boiling
Место публикации : Thermophysics and Aeromtchanics. - 2012. - Vol.19, №2. - С. 329-336
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): 1/f fluctuations--jet forms--nucleation frequency
Аннотация: Superheated water flowing out from high-pressure chamber through short cylindrical and slot channel has been studied experimentally. Relation of vaporization mechanisms in superheated liquid (boiling in single, not interacting centers, intense heterogeneous vaporization, and homogeneous fluctuating nucleation) and respective forms of superheated water jets has been determined. Temperature intervals with transient behavior of boiling have been determined. It is shown that at transient behavior of boiling the amplitude of pulsations of jet parameters increases, and in the spectra of pulsation power, the low-frequency component 1/f appears
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3.

Вид документа :
Шифр издания : 53/F 17
Автор(ы) : Faizullin M. Z., Reshetnikov A. V., Koverda V. P.
Заглавие : Synthesis of methane hydrate at low-temperature condensation of molecular beams
Место публикации : Doklady Physics. - 2010. - Vol.55, №8. - С. 388-390
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): amorphous solid water--ice
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4.

Вид документа :
Шифр издания : 53/F 17
Автор(ы) : Faizullin M. Z., Reshetnikov A. V., Koverda V. P.
Заглавие : Synthesis of methane hydrate at low-temperature condensation of molecular beams
Место публикации : Doklady Physics. - 2010. - Vol.55, №8. - С. 388-390
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): amorphous solid water--ice
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5.

Вид документа : Статья из журнала
Шифр издания : 53/S 86
Автор(ы) : Skokov V. N., Koverda V. P., Vinogradov A. V., Reshetnikov A. V.
Заглавие : Stochastic resonance at nonequilibrium phase transitions [Электронный ресурс]
Место публикации : Physica A. - 2015. - Vol. 430, Article number 15968. - С. 65-72
Систем. требования: http://www.sciencedirect.com/science/article/pii/S0378437115002071
Примечания : Bibliogr. : p. 71-72 (27 ref.). - 23.12.15
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): 1/f-noise--nonequilibrium phase transitions--boiling crisis
Аннотация: Abstract Thermal pulsations in a transition from a nucleate to a film regime of water boiling on a wire heater with a periodic Joule heat release have been studied experimentally. At frequencies of the periodic action smaller than 0.1 Hz the intermittency of the nucleate and film boiling regimes was observed. In this case the amplitude of thermal pulsations increased. The experiments with an additional noise source were carried out. With an increase in the intensity of the noise the power of the output periodic mode increased and reaching the maximum began to decrease. The results are interpreted as stochastic resonance when the periodic component of pulsations increases in the presence of noise. The results show that in a complex system with nonequilibrium phase transitions there can occur both the extreme fluctuations with 1/f power spectrum and stochastic resonance under external periodic action.
\\\\expert2\\nbo\\Physica A\\2015, v. 430, p.65-72.pdf
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6.

Вид документа : Статья из журнала
Шифр издания : 53/S 86
Автор(ы) : Skokov V. N., Koverda V. P., Vinogradov A. V., Reshetnikov A. V.
Заглавие : Stochastic resonance at nonequilibrium phase transitions [Электронный ресурс]
Место публикации : Physica A. - 2015. - Vol. 430, Article number 15968. - С. 65-72
Систем. требования: http://www.sciencedirect.com/science/article/pii/S0378437115002071
Примечания : Bibliogr. : p. 71-72 (27 ref.). - 23.12.15
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): 1/f-noise--nonequilibrium phase transitions--boiling crisis
Аннотация: Abstract Thermal pulsations in a transition from a nucleate to a film regime of water boiling on a wire heater with a periodic Joule heat release have been studied experimentally. At frequencies of the periodic action smaller than 0.1 Hz the intermittency of the nucleate and film boiling regimes was observed. In this case the amplitude of thermal pulsations increased. The experiments with an additional noise source were carried out. With an increase in the intensity of the noise the power of the output periodic mode increased and reaching the maximum began to decrease. The results are interpreted as stochastic resonance when the periodic component of pulsations increases in the presence of noise. The results show that in a complex system with nonequilibrium phase transitions there can occur both the extreme fluctuations with 1/f power spectrum and stochastic resonance under external periodic action.
\\\\expert2\\nbo\\Physica A\\2015, v. 430, p.65-72.pdf
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7.

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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8.

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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9.

Вид документа :
Шифр издания : 53/S 45
Автор(ы) : Skokov V. N., Reshetnikov A. V., Koverda V. P., Koverda V. P., Vinogradov A. V.
Заглавие : Self-organized criticality and 1/f-noise at interacting nonequilibrium phase transitions
Место публикации : Physica A. - 2001. - Vol.293, № 1-2. - С. 1-12
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): self-organized criticality--1/f fluctuations--power spectra
Аннотация: Oscillatory combustion regimes were experimentally investigated under the conditions of ignitable liquid boiling-up before the reaction front. Fluctuations with a power spectral density inversely proportional to frequency (1/f-noise) were observed and the power-law character of distribution functions was found. The phenomena are connected with the intersection and interaction of nonequilibrium phase transitions. A mathematical model describing the initiation of 1/f fluctuations at the interaction of a subcritical phase transition and supercritical one in a space-distributed system was suggested
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10.

Вид документа :
Шифр издания : 53/S 45
Автор(ы) : Skokov V. N., Reshetnikov A. V., Koverda V. P., Koverda V. P., Vinogradov A. V.
Заглавие : Self-organized criticality and 1/f-noise at interacting nonequilibrium phase transitions
Место публикации : Physica A. - 2001. - Vol.293, № 1-2. - С. 1-12
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): self-organized criticality--1/f fluctuations--power spectra
Аннотация: Oscillatory combustion regimes were experimentally investigated under the conditions of ignitable liquid boiling-up before the reaction front. Fluctuations with a power spectral density inversely proportional to frequency (1/f-noise) were observed and the power-law character of distribution functions was found. The phenomena are connected with the intersection and interaction of nonequilibrium phase transitions. A mathematical model describing the initiation of 1/f fluctuations at the interaction of a subcritical phase transition and supercritical one in a space-distributed system was suggested
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11.

Вид документа : Статья из журнала
Шифр издания : 53/S 66
Автор(ы) : Skokov V. N., Koverda V. P., Reshetnikov A. V.
Заглавие : Self-organization of a critical state and 1/f(alpha)-fluctuations at film boiling
Место публикации : Physics Letters A. - 1999. - V. 263, N 4-6. - С. 430-433
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): nonequilibrium phase transitions--1/f-noise
Аннотация: 1/f and 1/f(2)-fluctuations have been first revealed by experiment at film boiling on a vertically oriented platinum heater. Fluctuations of 1/f(alpha)-spectrum have been observed over both a wide range of governing parameters and a band of five decimal orders. The experimental results testify to a possible self-organized critical behaviors of a dynamical system at nonequilibrium phase transitions
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12.

Вид документа : Статья из журнала
Шифр издания : 53/S 66
Автор(ы) : Skokov V. N., Koverda V. P., Reshetnikov A. V.
Заглавие : Self-organization of a critical state and 1/f(alpha)-fluctuations at film boiling
Место публикации : Physics Letters A. - 1999. - V. 263, N 4-6. - С. 430-433
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): nonequilibrium phase transitions--1/f-noise
Аннотация: 1/f and 1/f(2)-fluctuations have been first revealed by experiment at film boiling on a vertically oriented platinum heater. Fluctuations of 1/f(alpha)-spectrum have been observed over both a wide range of governing parameters and a band of five decimal orders. The experimental results testify to a possible self-organized critical behaviors of a dynamical system at nonequilibrium phase transitions
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13.

Вид документа : Статья из журнала
Шифр издания : 53/R 45
Автор(ы) : Reshetnikov A. V., Skokov V. N., Koverda V. P.
Заглавие : Relaxation and power spectra of low-frequency fluctuations in foams
Место публикации : Journal of Applied Mechanics and Technical Physics. - 2012. - Vol.53, №6. - С. 834-838
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): foam formation--low-frequency fluctuations--power spectrum
Аннотация: The dynamics of foam formation in a water-glycerin solution was studied to establish the relationship between the relaxation characteristics and the fluctuation power spectrum for a stochastic process. Foaming occurred during the dissociation of the gas-saturated solution and during bubbling of the solution through a porous filter. Two types of relaxation of the foam-exponential and power-law-were revealed. The power-law type of relaxation was observed upon exposure to ultrasound. Relationships between the type of relaxation and the distribution of lowfrequency fluctuations and power spectra was established
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14.

Вид документа : Статья из журнала
Шифр издания : 53/R 45
Автор(ы) : Reshetnikov A. V., Skokov V. N., Koverda V. P.
Заглавие : Relaxation and power spectra of low-frequency fluctuations in foams
Место публикации : Journal of Applied Mechanics and Technical Physics. - 2012. - Vol.53, №6. - С. 834-838
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): foam formation--low-frequency fluctuations--power spectrum
Аннотация: The dynamics of foam formation in a water-glycerin solution was studied to establish the relationship between the relaxation characteristics and the fluctuation power spectrum for a stochastic process. Foaming occurred during the dissociation of the gas-saturated solution and during bubbling of the solution through a porous filter. Two types of relaxation of the foam-exponential and power-law-were revealed. The power-law type of relaxation was observed upon exposure to ultrasound. Relationships between the type of relaxation and the distribution of lowfrequency fluctuations and power spectra was established
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15.

Вид документа : Статья из журнала
Шифр издания : 53/R 30
Автор(ы) : Reshetnikov A. V., Mazheiko N. A., Skripov V. P., Skokov V. N., Koverda V. P.
Заглавие : Reaktive Recoil and Pressure Pulsations with 1/f Power Spectrum under Conditions of Explosion Boiling of Jets of Superheated Liquid
Место публикации : High Temperature. - 2002. - V. 40, N 5. - С. 701-705: graph. - ISSN 0040-3644. - ISSN 0040-3644
Примечания : Bibliogr.: p. 760 (14 n.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): thermophysics--reactive recoil--pressure pulsations--1/f power spectrum--superheated liquids
\\\\Expert2\\NBO\\High Temperature\\2002, v.40, p.701.pdf
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16.

Вид документа : Статья из журнала
Шифр издания : 53/R 30
Автор(ы) : Reshetnikov A. V., Mazheiko N. A., Skripov V. P., Skokov V. N., Koverda V. P.
Заглавие : Reaktive Recoil and Pressure Pulsations with 1/f Power Spectrum under Conditions of Explosion Boiling of Jets of Superheated Liquid
Место публикации : High Temperature. - 2002. - V. 40, N 5. - С. 701-705: graph. - ISSN 0040-3644. - ISSN 0040-3644
Примечания : Bibliogr.: p. 760 (14 n.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): thermophysics--reactive recoil--pressure pulsations--1/f power spectrum--superheated liquids
\\\\Expert2\\NBO\\High Temperature\\2002, v.40, p.701.pdf
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17.

Вид документа :
Шифр издания : 53/P 36
Автор(ы) : Pavlenko A. N., Koverda V. P., Reshetnikov A. V., Mazheiko N. A., Surtaev A. S., Zhukov V. E.
Заглавие : Peculiarities of superheated liquid discharging under strong and weak nonequilibrium conditions
Место публикации : Journal of Engineering Thermophysics. - 2010. - Vol.19, №4. - С. 289-305
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): superheated liquids--nonequilibrium conditions --high-pressure chamber
Аннотация: Results obtained in experimental investigating the characteristics of superheated liquid jet discharging under different nonequilibrium conditions are presented. The cases of liquid discharge from a high-pressure chamber and under gravitational jet formation conditions are considered. Different mechanisms of liquid flash boiling with heating growing up to limit superheating are identified in the case of liquid discharging from the high-pressure chamber. Dependences of the reactive force and the jet shape on the value of liquid overheating in a flow are presented. It is shown that the rapidly decreasing value of the reactive force of the jet is connected with its complete disintegration caused by homogeneous nucleation and by the presence of a normal wall behind the outlet from the channel. The parameters of two-phase jet stability in the conditions of gravitational falling, the flow rates, and the size of droplet dispersion zones depend substantially on the shape of holes and the heat flux density. Pronounced effects of partial or full blocking of the holes as a result of soluble impurities deposition in the regimes of cryogenic liquid evaporation or boiling when vapor cavities are formed in the channel are observed in the conditions of long-term discharging under nonadiabatic conditions. This leads to complete disintegration of the jet and uncontrollable reduction of the flow rate through the hole up to full blocking of the latter
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18.

Вид документа :
Шифр издания : 53/P 36
Автор(ы) : Pavlenko A. N., Koverda V. P., Reshetnikov A. V., Mazheiko N. A., Surtaev A. S., Zhukov V. E.
Заглавие : Peculiarities of superheated liquid discharging under strong and weak nonequilibrium conditions
Место публикации : Journal of Engineering Thermophysics. - 2010. - Vol.19, №4. - С. 289-305
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): superheated liquids--nonequilibrium conditions --high-pressure chamber
Аннотация: Results obtained in experimental investigating the characteristics of superheated liquid jet discharging under different nonequilibrium conditions are presented. The cases of liquid discharge from a high-pressure chamber and under gravitational jet formation conditions are considered. Different mechanisms of liquid flash boiling with heating growing up to limit superheating are identified in the case of liquid discharging from the high-pressure chamber. Dependences of the reactive force and the jet shape on the value of liquid overheating in a flow are presented. It is shown that the rapidly decreasing value of the reactive force of the jet is connected with its complete disintegration caused by homogeneous nucleation and by the presence of a normal wall behind the outlet from the channel. The parameters of two-phase jet stability in the conditions of gravitational falling, the flow rates, and the size of droplet dispersion zones depend substantially on the shape of holes and the heat flux density. Pronounced effects of partial or full blocking of the holes as a result of soluble impurities deposition in the regimes of cryogenic liquid evaporation or boiling when vapor cavities are formed in the channel are observed in the conditions of long-term discharging under nonadiabatic conditions. This leads to complete disintegration of the jet and uncontrollable reduction of the flow rate through the hole up to full blocking of the latter
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19.

Вид документа : Статья из журнала
Шифр издания : 53/L 95
Автор(ы) : Skokov V. N., Koverda V. P., Vinogradov A. V., Reshetnikov A. V.
Заглавие : Low-frequency fluctuations with 1/f α power spectrum in transient modes of water boiling on a wire heater
Место публикации : High Temperature. - 2010. - Vol.48, №5. - С. 706-712
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical exponent--dynamic scaling--power law
Аннотация: The investigation of transient modes of water boiling on a wire heater reveals the presence of random vibrations with the frequency dependence of power spectra of S ∼ f -α, where the exponent α has values in the range 0.8 ≤ α 2. Large-scale low-frequency fluctuations exhibiting the property of scale invariance, the duration of which is distributed by the power law P ∼ τ-β, are present in experimental realizations of random processes describing thermal fluctuations. The properties of such fluctuation processes are described using two nonlinear stochastic differential equations which describe the interaction between different phase transitions. Relations of dynamic scaling are determined between the critical exponents which define the frequency dependence of the power spectra of fluctuations α and of the distribution function of the amplitudes of extreme low-frequency fluctuations β. It is demonstrated that the critical exponents are related by the relation α + β
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20.

Вид документа : Статья из журнала
Шифр издания : 53/L 95
Автор(ы) : Skokov V. N., Koverda V. P., Vinogradov A. V., Reshetnikov A. V.
Заглавие : Low-frequency fluctuations with 1/f α power spectrum in transient modes of water boiling on a wire heater
Место публикации : High Temperature. - 2010. - Vol.48, №5. - С. 706-712
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical exponent--dynamic scaling--power law
Аннотация: The investigation of transient modes of water boiling on a wire heater reveals the presence of random vibrations with the frequency dependence of power spectra of S ∼ f -α, where the exponent α has values in the range 0.8 ≤ α 2. Large-scale low-frequency fluctuations exhibiting the property of scale invariance, the duration of which is distributed by the power law P ∼ τ-β, are present in experimental realizations of random processes describing thermal fluctuations. The properties of such fluctuation processes are described using two nonlinear stochastic differential equations which describe the interaction between different phase transitions. Relations of dynamic scaling are determined between the critical exponents which define the frequency dependence of the power spectra of fluctuations α and of the distribution function of the amplitudes of extreme low-frequency fluctuations β. It is demonstrated that the critical exponents are related by the relation α + β
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