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1.
Инвентарный номер: нет.
   
   A 71

   
    Arc current fluctuation power spectra in the system of a solid metal electrode and carbonate melt [Текст] / A. V. Reshetnikov, V. N. Sannikov, V. N. Skokov, V. P. Koverda // Journal of Applied Mechanics and Technical Physics. - 2007. - Vol. 48, № 1. - С. 7-10
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SOLID METALS
Аннотация: Arc current fluctuations between a solid metal electrode and a liquid melt of alkaline carbonates at atmospheric pressure are measured. Arc current fluctuation power spectra are determined from the measurement data. It is shown that the fluctuation power is inversely proportional to the frequency (1/f-fluctuations). The fluctuations have a normal Gaussian distribution. The observed 1/f fluctuations exhibit scale invariance.

\\\\Expert2\\NBO\\Journal of Applied Mechanics and Technical Physics\\2007, v. 48, N. 1, p.7.pdf
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2.
Инвентарный номер: нет.
   
   S 66

    Skokov, V. N.
    Fluctuations with a 1/f(alpha) spectrum in film boiling [] / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov // Jetp Letters. - 1999. - V. 69, N 8. - С. 636-639
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
NONEQUILIBRIUM PHASE TRANSITIONS -- 1/f-NOISE
Аннотация: 1/f and 1/f(2) noise were observed experimentally in film boiling of water on vertically oriented platinum heater. Fluctuations with a 1/f(alpha) spectrum were observed in a wide range of controlling parameters and seen over five orders of magnitude in frequency. It was noted that the process investigated is similar to the phenomenon of self-organized criticality

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3.
Инвентарный номер: нет.
   
   S 66

    Skokov, V. N.
    Self-organization of a critical state and 1/f(alpha)-fluctuations at film boiling [] / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov // Physics Letters A. - 1999. - V. 263, N 4-6. - С. 430-433
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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4.
Инвентарный номер: нет.
   
   О-42

   
    1/f-Noisa under Conditions of Interaction between Phase Transitions [] / V. N. Skokov, A. V. Reshetnikov, V. P. Koverda, A. V. Vinogradov // High Temperature. - 2001. - Vol. 39, N 2. - С. 296-301: il. - Bibliogr.: p. 321 (13 n.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f-NOISE -- PHASE TRANSITIONS

\\\\Expert2\\NBO\\High Temperature\\2001, v.39, p.316.pdf
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5.
Инвентарный номер: нет.
   
   R 30

   
    Reaktive Recoil and Pressure Pulsations with 1/f Power Spectrum under Conditions of Explosion Boiling of Jets of Superheated Liquid [] / A. V. Reshetnikov, N. A. Mazheiko, V. P. Skripov, V. N. Skokov, V. P. Koverda // High Temperature. - 2002. - V. 40, N 5. - 701-705: graph. - Bibliogr.: p. 760 (14 n.) . - ISSN 0040-3644
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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6.
Инвентарный номер: нет.
   
   F 68

   
    Flicker-Noise in Superheated Liquid Jets / A. V. Reshetnikov, V. P. Skripov, V. P. Koverda, N. A. Mazheiko, A. V. Vinogradov // Heat Transfer Research. - 2004. - Vol. 35, № 1-2. - С. 59-66
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
BOILING-UP LIQUID -- CRITICAL MODES -- VAPOR FORMATION
Аннотация: Change of the shape of a boiling-up liquid jet flowing from a high-pressure vessel at high superheatings was investigated experimentally. Mechanisms of volumetric heterogeneous and homogeneous nucleation are distinguished and their connection with critical modes of outflow is determined. Results of the experimental study of recoil of boiling-up liquid jets in a thermodynamically strong nonequilibrium mode of outflow are presented. The dynamics of vapor content fluctuations is studied by a method of photometry of passed laser radiation. Fluctuations of pressure in a superheated liquid jet at various mechanisms of vapor formation are measured by a method of strain metering. It was found that in intense volumetric boiling-up of a superheated liquid jet the power spectrum of fluctuations has a low-frequency component (flicker-noise) which diverges according to the 1/f law. This effect is related to nonequilibrium phase transitions in the system

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7.
Инвентарный номер: нет.
   

   
    1/f noise and self-organized criticality in crisis regimes of heat and mass transfer / V. N. Skokov, V. P. Koverda, A. V. Reshetnikov, V. P. Skripov, N. A. Mazheiko, A. V. Vinogradov // International Journal of Heat and Mass Transfer. - 2003. - Vol. 46, № 10. - С. 1879-1883
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1/f-NOISE -- FLUCTUATIONS -- FLICKER NOISE
Аннотация: Thermal fluctuations under the transition from nucleate to film boiling of water on a wire heater and fluctuations of jet form during an outflow of superheated liquid from a pressure vessel were experimentally investigated. It has been found that power spectrum of the fluctuations has got a low frequency component corresponding to a 1/f law (flicker noise).??The effect given is connected with the occurrence of nonequilibrium phase transitions in the systems: a crisis of heat transfer under the transition from nucleate to film boiling and a crisis of a flow in boiling-up of superheated liquid jet??

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8.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    1/f - Noise at non-equilibrium phase transitions / V. P. Koverda, V. N. Skokov, A. V. Reshetnikov // Nucleation Theory and Applications. - Dubna : JINR, 2002. - С. 259-272. - Bibliogr. : p.271-272 (17 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
FLICKER NOISE -- FLUCTUATION -- FILMS

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9.
Инвентарный номер: нет.
   
   F 17

    Faizullin, M. Z.
    Synthesis of methane hydrate at low-temperature condensation of molecular beams [Electronic resource] / M. Z. Faizullin, A. V. Reshetnikov, V. P. Koverda // Doklady Physics. - 2010. - Vol.55, №8. - P388-390
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
AMORPHOUS SOLID WATER -- ICE

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10.
Инвентарный номер: нет.
   
   P 36

   
    Peculiarities of superheated liquid discharging under strong and weak nonequilibrium conditions / A. N. Pavlenko, V. P. Koverda, A. V. Reshetnikov, N. A. Mazheiko, A. S. Surtaev, V. E. Zhukov // Journal of Engineering Thermophysics. - 2010. - Vol.19, №4. - С. 289-305
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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11.
Инвентарный номер: нет.
   
   S 45

   
    Self-organized criticality and 1/f-noise at interacting nonequilibrium phase transitions / V. N. Skokov, A. V. Reshetnikov, V. P. Koverda, V. P. Koverda, A. V. Vinogradov // Physica A. - 2001. - Vol.293, № 1-2. - С. 1-12
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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12.
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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13.
Инвентарный номер: нет.
   
   K 79

    Koverda, V. P.
    Statistics of low-frequency pulsations in critical regimes of heat mass exchange with phase transitions / V. P. Koverda, V. N. Skokov, A. V. Reshetnikov // Journal of Engineering Thermophysics. - 2007. - Vol.16, №3. - С. 130 -138
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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14.
Инвентарный номер: нет.
   
   B 73

   
    Boiling up of jets of superheated ethanol-water solutions / A. V. Reshetnikov, A. V. Vinogradov, V. N. Begletsov, V. N. Skokov, V. P. Koverda // Journal of Engineering Thermophysics. - 2007. - Vol.16, №4. - С. 244-248
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
EVOLUTION OF THE SHAPES -- SUPERHEATED AQUEOUS SOLUTIONS -- LOW-BOILING LIQUID
Аннотация: The stability and evolution of the shapes of jets of strongly superheated aqueous solutions of ethanol flowing out of a high-pressure chamber are experimentally investigated at various initial parameters. It has been found that a low-boiling liquid causes shifting to lower temperatures of the boundaries between various kinds of boiling-up jets, such as cylindrical, conical, and open. Large-scale pulsations of the jet shapes are observed in the temperature range from 454 to 484 K, where the jet completely breaks down. The conditions for the formation of large-scale low-frequency pulsations with a power spectrum diverging inversely proportional to the frequency f (1/f spectra) have been revealed. Such fluctuations prove that the flow is unstable and large-scale low-frequency ejections are possible

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15.
Инвентарный номер: нет.
   
   D 98

   
    Dynamics of transition processes and structure formation in critical heat-mass transfer regimes during liquid boiling and cavitation / A. N. Pavlenko, V. P. Koverda, A. V. Skokov, A. V. Reshetnikov, A. V. Vinogradov, A. S. Surtaev // Journal of Engineering Thermophysics. - 2009. - Vol.18, №1. - С. 20-38
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL PHENOMENA -- FALLING FILMS -- LIQUID CAVITATION
Аннотация: The results of experimental studies concerning the development of critical phenomena and structure formation in the process of boiling in falling films and during liquid cavitation are given. In conditions of stepwise and periodic pulsed surges of a thermal load, the parameters of formed metastable regular structures and critical parameters of heat-releasing surface drying are shown to be determined by the dynamics of moving wetting boundaries in the process of system self-organization. In the case of high-intensity heat fluxes, decomposition of a falling film is determined by propagation regimes of self-maintaining boiling fronts with a complex shape of intermediate structures. The study of ultrasonic cavitation of water, glycerin, and vacuum oil shows that structures of interacting gas-vapor bubbles (having the form of fractal clusters) are formed near the emitter surface. Spatial structures are characterized by a low-frequency divergence of the power spectra and a scale-invariant function of the fluctuation distributions. The experimental results are in good qualitative agreement with the numerical simulations performed within the theory of 1/f fluctuations in the case of nonequilibrium phase transitions in a spatially distributed system

\\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2009, V.18, N 1. P. 20-38.pdf
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16.
Инвентарный номер: нет.
   
   R 45

    Reshetnikov, A. V.
    Relaxation and power spectra of low-frequency fluctuations in foams [Электронный ресурс] / A. V. Reshetnikov, V. N. Skokov, V. P. Koverda // Journal of Applied Mechanics and Technical Physics. - 2012. - Vol.53, №6. - P834-838
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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17.
Инвентарный номер: нет.
   
   T 82

   
    Transient behavior of superheated water jets boiling [Электронный ресурс] / A. V. Reshetnikov, K. A. Busov, N. A. Mazheiko, V. N. Skokov, V. P. Koverda // Thermophysics and Aeromtchanics. - 2012. - Vol.19, №2. - P329-336
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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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18.
Инвентарный номер: нет.
   
   L 95

   
    Low-frequency fluctuations with 1/f α power spectrum in transient modes of water boiling on a wire heater [Electronic resource] / V. N. Skokov, V. P. Koverda, A. V. Vinogradov, A. V. Reshetnikov // High Temperature. - 2010. - Vol.48, №5. - P706-712
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
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 = 2 both in the experiments and in the theoretical model of interacting phase transitions. The power spectra of fluctuations are determined in the experiments with greater simplicity and accuracy than the distribution function of extreme amplitudes. In the cases where only the spectral dependence of power spectra of fluctuations is known, the correlations between the exponents enable one to obtain information about the distribution of large-scale surges and estimate dangerous amplitudes

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19.
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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20.
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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