Begell House Inc.
Interfacial Phenomena and Heat Transfer
IPHT
2169-2785
7
2
2019
SIBERIAN ACADEMICIAN ALEXEY REBROV:WAY TO SCIENTIFIC HEIGHTS
v-xi
10.1615/InterfacPhenomHeatTransfer.2019031429
Natalia A.
Kupershtokh
Institute of History, Siberian Branch of the Russian Academy of Sciences, 8, Nikolaev Str.,
Novosibirsk, 630090, Russia
Siberian Branch of the Russian Academy of Sciences (RAS)
Kutateladze Institute of Thermophysics
Academician A.K. Rebrov
On July 30, 2018, Alexey Kuzmich Rebrov, academician of the Russian Academy of Sciences, celebrated his 85th birthday.
The Russian scientist is known for the outstanding results in the field of rarefied gas dynamics and thermophysics.
This paper analyzes the social conditions and scientific and educational environment that influenced the vital activity
of Alexey Rebrov and determined his creative development.
THE USE OF MOLYBDENUM ACTIVATOR FOR DEPOSITION OF FLUOROPOLYMER COATINGS WITH DIFFERENT STRUCTURES BY THE HOT WIRE CHEMICAL VAPOR DEPOSITION METHOD
97-103
10.1615/InterfacPhenomHeatTransfer.2019030489
Alexey I.
Safonov
Kutateladze Institute of Thermophysics SB RAS, Lavrentyev Ave. 1, 630090, Novosibirsk,
Russia
Denis Y.
Panin
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Lavrentyev Ave. 1, 630090, Novosibirsk, Russia
Nikolay I.
Timoshenko
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Lavrentyev Ave. 1, 630090, Novosibirsk, Russia
polytetrafluoroethylene (PTFE)
catalytic chemical vapor deposition (CVD)
molybdenum filament
hydrophobic
The possibility of using a molybdenum activator in the deposition of a fluoropolymer coating with different surface
structures by the hot wire chemical vapor deposition method is presented. The significant influence of the temperature
of the molybdenum filament of the activator on the structure of the deposited fluoropolymer coating is established. The
temperature limits of the molybdenum activator application in the deposition of fluoropolymer coatings are determined.
A slight transfer of the material of the molybdenum filament of the activator with its oxidation into the fluoropolymer
coating structure during the synthesis of the coating is established. It is found that the obtained fluoropolymer coatings have hydrophobic properties.
SPECTROPHOTOMETRY TECHNIQUE FOR DROPLET PHASE SPATIAL DISTRIBUTION MEASUREMENTS IN GAS-DROPLET FLOW BEHIND A SUPERSONIC NOZZLE IN A VACUUM
105-111
10.1615/InterfacPhenomHeatTransfer.2019031185
Igor V.
Yarygin
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Lavrentyev Ave, 1, Novosibirsk, 630090, Russia
Victor G.
Prikhodko
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Lavrentyev Ave, 1, Novosibirsk, 630090, Russia
Yury N.
Vyazov
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Novosibirsk, Russia
supersonic nozzle
gas-droplet flow
vacuum
droplet phase diagnostics
spectrophotometry
A measurement technique for droplet phase spatial distribution in gas-droplet flows under conditions of rapid evaporation of droplets is proposed. The technique is based on the deposition of droplets colored with a non-sublimated dye on paper substrates and subsequent residue analysis by a spectrophotometry method. The spatial distribution of the
droplet phase in the gas-droplet flow, formed under the pulsed outflow of a near-wall liquid film accompanied by the
gas flow from a supersonic nozzle into a vacuum, is investigated using the proposed technique.
SURFACE STRUCTURING OF KAPTON POLYIMIDE WITH FEMTOSECOND AND PICOSECOND IR LASER PULSES
113-121
10.1615/InterfacPhenomHeatTransfer.2019031067
Jan
Hrabovsky
HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, 28, 252 41 Dolni
Brezany, Czech Republic; Faculty of Chemical Technology, University of Pardubice, Studentska 95, Pardubice, Czech Republic; Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 2027/3, 121 16 Prague
Chiara
Liberatore
HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, 28, 252 41 Dolni
Brezany, Czech Republic
Inam
Mirza
HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, 28, 252 41 Dolni
Brezany, Czech Republic
Juraj
Sladek
HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, 28, 252 41 Dolni
Brezany, Czech Republic; Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague,
Trojanova 13, 120 00 Prague, Czech Republic
Jiri
Beranek
HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, 28, 252 41 Dolni
Brezany, Czech Republic; Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague,
Trojanova 13, 120 00 Prague, Czech Republic
Alexander V.
Bulgakov
S.S. Kutateladze Institute of Thermophysics SB RAS, 1 Lavrentyev Ave., 630090 Novosibirsk,
Russia; HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, Za Radnicí 828, 252 41
Dolní Břežany, Czech Republic
Nadezhda M.
Bulgakova
HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, 28, 252 41 Dolni
Brezany, Czech Republic; S.S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, 1 Lavrentyev Ave., Novosibirsk, 630090, Russia
polymers
polyimide
ultrashort laser pulses
laser processing
laser ablation
damage threshold
crater profile
swelling
multiphoton absorption
Pulsed laser ablation is one of the most efficient and clean methods for high-precision processing and modification of
polymers and biomaterials. Polymer ablation has been extensively investigated with ultraviolet lasers while little attention has been given to the infrared (IR) region, which becomes particularly interesting with the recent advances in ultrashort laser technologies. Here, we report the results of a comparative study on 1030-nm ultrashort laser structuring of Kapton polyimide, a polymer important in a variety of applications, with direct comparison of 247-fs and 7-ps laser pulses. The laser-induced damage thresholds for both pulse durations have been determined and the femtosecond laser threshold has been found to be considerably lower than that for picosecond pulses (by a factor of ~ 3.5). Both femtosecond and picosecond laser–produced craters have been thoroughly investigated as a function of pulse energy and focusing conditions. It has been demonstrated that femtosecond laser pulses enable accurate polyimide structuring while picosecond irradiation regimes result in a number of undesired effects such as re-deposition of the ablation debris, surface swelling, and the formation of high rims around the ablation craters. The mechanisms of polyimide ablation with femtosecond and picosecond IR laser pulses are discussed.
VACUUM PROCESSING OF GOLD-BEARING CLAY MATERIALS
123-129
10.1615/InterfacPhenomHeatTransfer.2019030520
Alexander
Fedoseev
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, 630090, Russia
G. I.
Sukhinin
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, 1 Lavrentiev Ave., Novosibirsk, 630090, Russia; Novosibirsk State University, 2 Pirogov Str., Novosibirsk, 630090, Russia
Igor V.
Yarygin
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Lavrentyev Ave, 1, Novosibirsk, 630090, Russia
Victor G.
Prikhodko
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Lavrentyev Ave, 1, Novosibirsk, 630090, Russia
Sergey A.
Novopashin
Institute of Thermophysics SB RAS, Lavrentyev Ave, 1, Novosibirsk, 630090, Russia
heat and moisture transfer
porous material
evaporation and crystallization
The influence of vacuum on a spherical clay sample is investigated via numerical simulation and experiment. The
temporal and radial dependences of the temperature and mass of these samples were measured in the vacuum drying
process. The numerical model in which the measurements were conducted calculates the moisture and heat transfer
equations, where the effective coefficients of thermal conductivity and diffusion were set equal to the coefficients of a moist porous medium. Calculations were performed for various initial and boundary conditions. The data obtained on the temperature and moisture content distributions had sufficient deviations from the experimental data; however, both described important qualitative distribution features. The results of the current paper will help in determining the conditions of effective clay disintegration, which will facilitate the extraction of gold from gold-bearing clays.
EXPERIENCE IN THE SYNTHESIS OF DIAMOND FROM A SUPERSONIC MICROWAVE PLASMA JET
131-137
10.1615/InterfacPhenomHeatTransfer.2019031315
A. K.
Rebrov
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of
Sciences, 1 Lavrentyev Avenue, Novosibirsk, 630090, Russia
M. S.
Bobrov
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of
Sciences, 1 Lavrentyev Avenue, Novosibirsk, 630090, Russia
Aleksey Alekseevich
Emelyanov
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of
Sciences, 1 Lavrentyev Avenue, Novosibirsk, 630090, Russia
Nikolay I.
Timoshenko
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences,
Lavrentyev Ave. 1, 630090, Novosibirsk, Russia
Michael Yu.
Hrebtov
Institute of Thermophysics of SB RAS,Ac. Lavrentieva ave. 1, Novosibirsk, Russian
Federation, 630090; Novosibirsk State University, Pirogova st., 2, Novosibirsk, Russian Federation, 630090
Ivan B.
Yudin
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of
Sciences, 1 Lavrentyev Avenue, Novosibirsk, 630090, Russia
nanoparticles
diamond coatings
microwave plasma
gas jet
In this paper, the traditional method of microwave plasma generation is used in combination with the formation of
a high-velocity plasma flow from a resonant chamber into an evacuated deposition chamber. In the experiments, a
modernized magnetron with power up to 3 kW at a frequency of 2.45 GHz is used. The calculations of the microwave
plasma formation process make, in practice, it possible to estimate the optimal geometry of the discharge chamber for
an acceptable distribution of the electromagnetic field in the discharge region. The gas-dynamic calculations give an
estimate of the approximate content of atomic hydrogen at the deposition surface. The results of the work determine
ways for further research on the synthesis of diamond from high-speed microwave plasma jets.
THERMAL MODEL-BASED DETERMINATION OF DISSOCIATION DEGREE OF HYDROGEN FLOWING IN A HOT TUBE
139-149
10.1615/InterfacPhenomHeatTransfer.2019030380
Alexey A.
Morozov
Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, 1
Lavrentyev Ave., 630090 Novosibirsk, Russia
T. T.
B'yadovskiy
Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, 1
Lavrentyev Ave., 630090 Novosibirsk, Russia
K. V.
Kubrak
Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, 1
Lavrentyev Ave., 630090 Novosibirsk, Russia
M. Yu.
Plotnikov
Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, 1
Lavrentyev Ave., 630090 Novosibirsk, Russia
Ivan B.
Yudin
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of
Sciences, 1 Lavrentyev Avenue, Novosibirsk, 630090, Russia
high-temperature tube
gas-surface heat transfer
thermal model
hydrogen dissociation
A thermal model of a cylindrical thin-walled tube heated up to a high temperature by electric current has been developed. For the current-carrying tube, the heat conduction equation is solved by taking into account the tube radiation, heat exchange with the gas surrounding and flowing inside the tube, and the gas dissociation at the tube surface. The model is verified via comparison with experimental data on the hot tube temperature and electrical resistance for argon, helium, and hydrogen up to a tube temperature of 2200° C. To ground the heat exchange with the flowing gas used in the model, calculations of the gas flow in the tube have been performed using the direct simulation Monte Carlo method. The proposed thermal model allows determining the channels of distribution of the energy released at the tube as a result of Joule heating. The calculated heat balance makes it possible to estimate the degree of hydrogen dissociation at the outlet of the tube.
INFLUENCE OF INTERFACIAL PHENOMENA ON VISCOSITY AND THERMAL CONDUCTIVITY OF NANOFLUIDS
151-165
10.1615/InterfacPhenomHeatTransfer.2019031015
Marina A.
Morozova
Kutateladze Institute of Thermophysics, Siberian Branch of the RAS, Novosibirsk, Russia
Sergey A.
Novopashin
Institute of Thermophysics SB RAS, Lavrentyev Ave, 1, Novosibirsk, 630090, Russia
nanofluids
thermal conductivity
viscosity
interfacial phenomena
This paper reviews theoretical and experimental studies of the effect of various parameters of nanofluids on their thermal conductivity and viscosity. Parameters such as the volume concentration of nanoparticles, their size, temperature of nanofluid, etc., are considered here. The influence of interfacial phenomena on the thermophysical properties of nanofluids is considered in detail. The effect of an attached layer on the particle surfaces on the thermal conductivity and viscosity of nanofluids is analyzed qualitatively and quantitatively. It is shown that the nature of the decrease in thermal conductivity observed in some experiments in comparison with the theoretical values is related to the need to take into account the thermal contact resistance at the particle-liquid interface, in which the influence of the attached layer can lead to an anomalous increase in viscosity and formation of the rheological properties of nanofluids.
HEAT TRANSFER AND PHASE TRANSFORMATIONS IN THE LOCALIZATION OF FOREST FUEL COMBUSTION
167-195
10.1615/InterfacPhenomHeatTransfer.2019031564
Geniy V.
Kuznetsov
National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russia
Ivan S.
Voytkov
National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russia
Svetlana S.
Kralinova
National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russia
Yuliana K.
Atroshenko
National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russia
forest fuel (FF)
combustion front
combustion localization by water line
experiment
predictive model
numerical simulation
The results of experimental studies of heat transfer in the layers of forest fuel (FF) when localizing the propagating fronts of its flame combustion and thermal decomposition using protective water lines are presented. These lines were moistened layers of FF before the thermal decomposition front. The varied parameters were the volume of poured liquid, size of the barrier line, conditions of material wetting, specific consumption, irrigation density, etc. The main attention was focused on defining the conditions of thermal balance at a boundary between the material subjected to thermal decomposition and the protective water line to determine the dominant mechanisms of combustion suppression or localization. The experiments were carried out with typical forest fuels: leaves, needles, and a mixture of leaves and needles. It was established that the effective conditions of combustion localization may be provided by suppressing the material burning in the vicinity of the water line boundary. This important experimental result has become the basis for the development of a physical and mathematical model for predicting the effective conditions of the material combustion localization. The developed model serves to obtain data that justify the determining role of energy sink to the protective water line, as well as the flame combustion and pyrolysis of the material in front of it.