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1.
Инвентарный номер: нет.
   
   D 63

   
    Disintegration of flows of superheated liquid films and jets [Electronic resource] / A. N. Pavlenko, V. P. Koverda, A. V. Reshetnikov, A. S. Surtaev, A. N. Tsoi, N. A. Mazheiko, K. A. Busov, V. N. Skokov // Journal of Engineering Thermophysics. - Bibliogr. : p. 192-193 (65 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CYLINDRICAL CHANNEL -- EXPERIMENTAL INVESTIGATIONs -- BOILING INCIPIENCE
Аннотация: This paper represents results on investigating the dynamics of boiling and disintegration of superheated liquid films and jets. The first part deals with experimental study of boiling liquid outflow through short cylindrical and slit channels. Evolution of disintegration of a hot water jet flow is observed both at low and moderate superheating and at high and limit superheating, and also for vaporization mechanisms corresponding to these superheatings. Peculiarities of disintegration of jets through slit and cylindrical channels are noticed. Results on measuring the reactive thrust of the jet through a slit channel under different geometrical conditions behind the channel outlet are represented. The 1/f fluctuations in transient regimes of superheated liquid boiling and in transient regimes of behavior of the jet shape are found. The second part of this article represents results on experimental investigation of nonsteady heat transfer and dynamics of the development of crisis phenomena at boiling of a falling subcooled liquid film in the conditions of stepwise heat release. The experimental data were obtained using synchronized high-speed infrared thermography and video. It is shown that with growth and condensation of vapor bubbles, on the liquid film interface appear large-amplitude waves that lead to considerably increasing local intensity of heat transfer. New data on the boiling incipience temperature in a subcooled liquid film, depending on the heat flux density, are obtained. It is found that the development of boiling crisis is a result of appearance of local dry patches and their subsequent growth by the mechanism of longitudinal thermal conductivity in the heat transfer wall as the equilibrium heat flux density is exceeded

\\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2013, V.22, N 3. P. 174-193.pdf
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2.
Инвентарный номер: нет.
   
   D 63

   
    Disintegration of flows of superheated liquid films and jets [Electronic resource] / A. N. Pavlenko, V. P. Koverda, A. V. Reshetnikov, A. S. Surtaev, A. N. Tsoi, N. A. Mazheiko, K. A. Busov, V. N. Skokov // Journal of Engineering Thermophysics. - Bibliogr. : p. 192-193 (65 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CYLINDRICAL CHANNEL -- EXPERIMENTAL INVESTIGATIONs -- BOILING INCIPIENCE
Аннотация: This paper represents results on investigating the dynamics of boiling and disintegration of superheated liquid films and jets. The first part deals with experimental study of boiling liquid outflow through short cylindrical and slit channels. Evolution of disintegration of a hot water jet flow is observed both at low and moderate superheating and at high and limit superheating, and also for vaporization mechanisms corresponding to these superheatings. Peculiarities of disintegration of jets through slit and cylindrical channels are noticed. Results on measuring the reactive thrust of the jet through a slit channel under different geometrical conditions behind the channel outlet are represented. The 1/f fluctuations in transient regimes of superheated liquid boiling and in transient regimes of behavior of the jet shape are found. The second part of this article represents results on experimental investigation of nonsteady heat transfer and dynamics of the development of crisis phenomena at boiling of a falling subcooled liquid film in the conditions of stepwise heat release. The experimental data were obtained using synchronized high-speed infrared thermography and video. It is shown that with growth and condensation of vapor bubbles, on the liquid film interface appear large-amplitude waves that lead to considerably increasing local intensity of heat transfer. New data on the boiling incipience temperature in a subcooled liquid film, depending on the heat flux density, are obtained. It is found that the development of boiling crisis is a result of appearance of local dry patches and their subsequent growth by the mechanism of longitudinal thermal conductivity in the heat transfer wall as the equilibrium heat flux density is exceeded

\\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2013, V.22, N 3. P. 174-193.pdf
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3.
Инвентарный номер: нет.
   
   S 86

   
    Stochastic resonance at nonequilibrium phase transitions [Electronic resource] / V. N. Skokov, V. P. Koverda, A. V. Vinogradov, A. V. Reshetnikov // Physica A. - 2015. - Vol. 430, Article number 15968. - С. 65-72. - Bibliogr. : p. 71-72 (27 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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4.
Инвентарный номер: нет.
   
   H 99

   
    Hydrodynamic response to explosive boiling-up in a jet of superheated water [Electronic resource] / A. V. Reshetnikov, N. A. Mazheiko, V. N. Skokov, V. P. Koverda // International Journal of Heat and Mass Transfer. - 2015. - Vol. 85, June. - С. 965-970. - Bibliogr. : p. 969-970 (35 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f FlUCTUATIONS -- COANDA EFFECT -- COMPLETE JET BREAKUP
Аннотация: The behavior of the jet recoil of boiling water discharging through a short cylindrical nozzle into the atmosphere and jet shape under high and limit superheating was experimentally studied. There was a complete breakup of the jet under both the realization of intensive heterogeneous nucleation (explosive boiling-up) in the flow and the presence of an adjacent plane behind the nozzle outlet. The complete jet breakup was accompanied by a sharp decrease of the jet recoil (the crisis of the recoil force). An explanation of the observed phenomena was given with the involvement of the Coanda effect. In both the transient regimes of boiling-up and the transition to the complete jet breakup 1/f fluctuations were observed. They pointed to the instability and possibility of large-scale outburst in the flow

\\\\expert2\\nbo\\International Journal of Heat and Mass Transfer\\2015, v. 85, p.965-970.pdf
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5.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    Noise-induced synchronization in a spatially distributed system with a 1/f spectrum [Electronic resource] / V. P. Koverda, V. N. Skokov // Doklady Physics. - 2015. - Vol. 60, № 5. - С. 193-196. - Bibliogr. : p. 196 (15 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
NOISE-INDUCED SYNCHRONIZATION -- SPATIAL INTERACTION -- NONEQUILIBRIUM PHASE TRANSITIONS
Аннотация: Noise-induced synchronization, which resembles the critical phase transition upon attaining a rather large intensity of white noise, is manifested in a spatially distributed system with the 1/f spectrum of power, which describes nonequilibrium phase transitions. In this case, the spatial interaction in the system is important.

\\\\expert2\\nbo\\Doklady Physics\\2015, v.60, N 5, p.193-196.pdf
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6.
Инвентарный номер: нет.
   
   H 99

   
    Hydrodynamic response to explosive boiling-up in a jet of superheated water [Electronic resource] / A. V. Reshetnikov, N. A. Mazheiko, V. N. Skokov, V. P. Koverda // International Journal of Heat and Mass Transfer. - 2015. - Vol. 85, June. - С. 965-970. - Bibliogr. : p. 969-970 (35 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f FlUCTUATIONS -- COANDA EFFECT -- COMPLETE JET BREAKUP
Аннотация: The behavior of the jet recoil of boiling water discharging through a short cylindrical nozzle into the atmosphere and jet shape under high and limit superheating was experimentally studied. There was a complete breakup of the jet under both the realization of intensive heterogeneous nucleation (explosive boiling-up) in the flow and the presence of an adjacent plane behind the nozzle outlet. The complete jet breakup was accompanied by a sharp decrease of the jet recoil (the crisis of the recoil force). An explanation of the observed phenomena was given with the involvement of the Coanda effect. In both the transient regimes of boiling-up and the transition to the complete jet breakup 1/f fluctuations were observed. They pointed to the instability and possibility of large-scale outburst in the flow

\\\\expert2\\nbo\\International Journal of Heat and Mass Transfer\\2015, v. 85, p.965-970.pdf
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7.
Инвентарный номер: нет.
   
   S 86

   
    Stochastic resonance at nonequilibrium phase transitions [Electronic resource] / V. N. Skokov, V. P. Koverda, A. V. Vinogradov, A. V. Reshetnikov // Physica A. - 2015. - Vol. 430, Article number 15968. - С. 65-72. - Bibliogr. : p. 71-72 (27 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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8.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    Noise-induced synchronization in a spatially distributed system with a 1/f spectrum [Electronic resource] / V. P. Koverda, V. N. Skokov // Doklady Physics. - 2015. - Vol. 60, № 5. - С. 193-196. - Bibliogr. : p. 196 (15 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
NOISE-INDUCED SYNCHRONIZATION -- SPATIAL INTERACTION -- NONEQUILIBRIUM PHASE TRANSITIONS
Аннотация: Noise-induced synchronization, which resembles the critical phase transition upon attaining a rather large intensity of white noise, is manifested in a spatially distributed system with the 1/f spectrum of power, which describes nonequilibrium phase transitions. In this case, the spatial interaction in the system is important.

\\\\expert2\\nbo\\Doklady Physics\\2015, v.60, N 5, p.193-196.pdf
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9.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    Coupled phase transitions under periodic perturbation [Electronic resource] / V. P. Koverda, V. N. Skokov // Doklady Physics. - 2014. - Vol. 59, № 7. - С. 291-294. - Bibliogr. : p. 294 (15 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
STOCHASTIC EQUATIONS -- STOCHASTIC PROCESSES
Аннотация: The influence of periodic perturbation on the system of two nonlinear stochastic equations, which model low-frequency pulsations in crisis and transient modes of heat-and-mass transfer with phase transitions, has been investigated by numerical methods. When studying the influence of the periodic perturbation on the system, a researcher should largely take into account the phase diagram. It is shown that nonequilibrium phase transitions from asymmetric cycles of phase trajectories to centrally symmetric ones occur in the absence of noise. These transitions are accompanied by the stochastic resonance response, which enhances as the frequency of the external periodic force decreases

\\\\expert2\\nbo\\Doklady Physics\\2014, v.59, N 7, p.291-294.pdf
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10.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    Stochastic resonance and 1/f noise at coupled phase transitions [Electronic resource] / V. P. Koverda, V. N. Skokov // Physica A. - 2014. - Vol.391. - С. 173-181. - Bibliogr. : p. 181 (24 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
STOCHASTIC EQUATIONS -- STOCHASTIC RESONANCE
Аннотация: The system of two nonlinear stochastic equations simulating 1/f fluctuations during the interaction of nonequilibrium phase transitions in the presence of an external periodic action has been studied by numerical methods. It is shown that in the system there appears stochastic resonance, which leads to an amplification of the output periodic signal under the action of noise. To a random process with a 1/f power spectrum corresponds the maximum Gibbs-Shannon informational entropy. At stochastic resonance the informational entropy is minimum. A new behavior of a two-dimensional system at stochastic resonance has been revealed: at low frequencies of a periodic action with an increased white noise intensity the system trajectories are limited by two mutually perpendicular directions - anisotropic stochastic resonance. With a further increase in the white noise intensity in the system one can observe "ordinary" stochastic resonance, when the increasing intensity of fluctuations in the vicinity of the driving frequency is smeared in the directions

\\\\expert2\\nbo\\Physica A\\2014, v. 393, p.173-181.pdf
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