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1.
Wüstite stability in
the presence of a CO2-
fluid
and a carbonate-silicate melt: Implications for the graphite/diamond formation and generation of Fe-rich mantle metasomatic agents / Y. V. Bataleva [et al.]> // Lithos. - 2016. -
Vol. 244
. - P. 20-29,
DOI
10.1016/j.lithos.2015.12.001. - Cited References: 68. - This work was supported by the Russian Science Foundation under grant no. 14-27-00054. The authors thank A. Moskalev for his assistance in the work preparation, A. Khokhryakov for useful suggestions throughout the study, and S. Ovchinnikov for his assistance in implementation of Mössbauer spectroscopy measurements. The authors thank editor M. Scambelluri, and two anonymous reviewers for their useful comments, which helped to profoundly improve the manuscript. . - ISSN 0024-4937
РУБ
Geochemistry & Geophysics + Mineralogy
Рубрики:
EARTHS LOWER MANTLE
FERRIC IRON CONTENT
DIAMOND FORMATION
MINERAL INCLUSIONS
NATURAL DIAMOND
OXIDATION-STATE
DEEP MANTLECRUST
LITHOSPHERIC MANTLE
OXYGEN FUGACITY
OCEANIC-CRUST
Кл.слова (ненормированные):
Wustite
--
CO2-
fluid
--
Carbonate-silicate melt
--
Decarbonation
--
Graphite formation
--
HPHT experiment
Аннотация:
Experimental simulation of the interaction of wüstite with a CO2-rich
fluid
and a carbonate-silicate melt was performed using a multianvil high-pressure split-sphere apparatus in the FeO-MgO-CaO-SiO2-Al2O3-CO2 system at a pressure of 6.3GPa and temperatures in the range of 1150°C-1650°C and with run time of 20h. At relatively low temperatures, decarbonation reactions occur in the system to form iron-rich garnet (Alm75Prp17Grs8), magnesiowüstite (Mg#≤0.13), and CO2-rich
fluid
. Under these conditions, magnesiowüstite was found to be capable of partial reducing CO2 to C0 that leads to the formation of Fe3+-bearing magnesiowüstite, crystallization of magnetite and metastable graphite, and initial growth of diamond seeds. At T≥1450°C, an iron-rich carbonate-silicate melt (FeO~56wt.%, SiO2~12wt.%) forms in the system. Interaction between (Fe,Mg)O, SiO2,
fluid
and melt leads to oxidation of magnesiowüstite and crystallization of fayalite-magnetite spinel solid solution (1450°C) as well as to complete dissolution of magnesiowüstite in the carbonate-silicate melt (1550°C-1650°C). In the presence of both carbonate-silicate melt and CO2-rich
fluid
, dissolution (oxidation) of diamond and metastable graphite was found to occur. The study results demonstrate that under pressures of the lithospheric mantle in the presence of a CO2-rich
fluid
, wüstite/magnesiowüstite is stable only at relatively low temperatures when it is in the absolute excess relative to CO2-rich
fluid
. In this case, the redox reactions, which produce metastable graphite and diamond with concomitant partial oxidation of wüstite to magnetite, occur. Wüstite is unstable under high concentrations of a CO2-rich
fluid
as well as in the presence of a carbonate-silicate melt: it is either completely oxidized or dissolves in the melt or
fluid
phase, leading to the formation of Fe2+- and Fe3+-enriched carbonate-silicate melts, which are potential metasomatic agents in the lithospheric mantle. © 2015 Elsevier B.V.
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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Koptyug ave 3, Novosibirsk, Russian Federation
Novosibirsk State University, Pirogova str 2, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Y .N.; Sokol, A. G.; Borzdov, Y. M.; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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2.
UWB Borehole Logging
Tool to Explore the Electrical and Structural Properties of Near-wellbore
Fluid
-filled Areas / M. I. Epov, I. N. Yeltsov, V. L. Mironov, K. V. Muzalevskiy> //
Proc. PIER. - 2011. - P59-62
eLibrary
Доп.точки доступа:
Epov, M. I.; Эпов, Михаил Иванович; Yeltsov, I. N.; Mironov, V. L.; Миронов, Валерий Леонидович; Muzalevskiy, K. V.; Музалевский, Константин Викторович; Progress In Electromagnetics Research Symposium Proceedings(2011 ; Sept. 12-16 ; Suzhou, China)
}
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3.
The role of
rocks saturated with metallic iron in the formation of ferric carbonate-silicate melts: experimental modeling under PT-conditions of lithospheric mantle / Y. V. Bataleva [et al.]> // Russ. Geol. Geophys. - 2015. -
Vol. 56
,
Is. 1-2
. - P. 143-154,
DOI
10.1016/j.rgg.2015.01.008. - Cited References:68. - This work was supported by Integration project 31 from the Siberian Branch of the Russian Academy of Sciences and by grant 12-05-00740 from the Russian Foundation for Basic Research. . - ISSN 1068. - ISSN 1878-030X. -
РУБ
Geosciences, Multidisciplinary
Рубрики:
OXYGEN FUGACITY
DIAMOND FORMATION
OXIDATION-STATE
EARTHS MANTLE
Кл.слова (ненормированные):
carbonate-silicate melt
--
graphite
--
CO2
fluid
--
iron carbide
--
garnet
--
redox gradient
--
high-pressure experiment
Аннотация:
Experimental modeling of the processes of formation of ferric carbonate-silicate melts through the carbonate-oxide-metal interaction is performed in the (Mg,Ca)CO3-SiO2-Al2O3-Fe0 system at 6.3 and 7.5 GPa and within 1150-1650 °C, using a multianvil high-pressure apparatus of “split-sphere” type (BARS). Two parallel reactions run in the subsolidus region (1150-1450 °C): decarbonation, producing pyrope-almandine (Fe# = 0.40-0.75) and CO2
fluid
, and redox interaction between carbonate and Fe0, resulting in the crystallization of iron carbide in assemblage with magnesiowustite (Fe# = 0.75-0.85). It is shown that the reduction of carbonate or CO2
fluid
by iron carbide and parallel redox interaction of magnesiowustite with CO2 produce graphite in assemblage with Fe3 + -containing magnesiowustite. In the temperature range of 1450-1650 °C, generation of carbonate-silicate melts coexisting with pyrope-almandine, magnesiowustite, magnetite, ferrospinel, and graphite takes place. The composition of the produced melts is as follows: SiO2 - 10-15 wt.%, X(FeO + Fe2O3) = 36-43 wt.%, and Fe3+/XFe - 0.18-0.23. These Fe3 + -enriched carbonate-silicate melts/fluids are saturated with carbon and are the medium of graphite crystallization. Oxide and silicate phases (almandine, ferrospinel, and magnetite) coexisting with graphite are also characterized by high Fe3+/XFe values. It has been established that Fe3 + -enriched carbonate-silicate melts can result from the interaction of Fe0-containing rocks with carbonated rocks. In the reduced mantle (with the presence of iron carbides or oxides), melts of this composition can be the source of carbon and the medium of graphite crystallization at once. After separation and ascent, these ferric carbonate-silicate melts can favor oxidizing metasomatism in the lithospheric mantle.
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Публикация на русском языке
Роль пород, содержащих самородное железо, в образовании железистых карбонатно-силикатных расплавов: экспериментальное моделирование при P-T-параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Геол. и геофиз. - Новосибирск : Изд-во СО РАН, 2015. - Т. 56 № 1-2. - С. 188-203
Держатели документа:
Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Novosibirsk State Univ, Novosibirsk 630090, Russia.
Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Sokol, A. G.; Borzdov, Yu. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Siberian Branch of the Russian Academy of Sciences [31]; Russian Foundation for Basic Research [12-05-00740]
}
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4.
Systematic experimental investigation
of filtration losses of drilling fluids containing silicon oxide nanoparticles / A. V. Minakov [et al.]> // J. Nat. Gas Sci. Eng. - 2019. -
Vol. 71
. - Ст. 102984,
DOI
10.1016/j.jngse.2019.102984. - Cited References: 28. - The research was performed with the financial support of the Russian Science Foundation under project No. 17-79-20218. . - ISSN 1875-5100
Перевод заглавия:
Систематическое экспериментальное исследование фильтрационных потерь буровых растворов, содержащих наночастицы оксида кремния
Кл.слова (ненормированные):
Drilling
fluid
--
Nanoparticles
--
Microsuspension
--
Filtration loss
--
Permeability
--
Porous medium
--
Ceramic filter
Аннотация:
This paper presents the results of silicon oxide nanoparticles-incorporated drilling
fluid
filtration through a porous medium with different permeability. A water-based clay suspension was used as a basic model for creating investigated
fluid
samples. AlN (aluminium nitride) particles were used as a dispersed phase. The concentration of microparticles varied from 0.5 to 4.00 wt%, while the microparticles size varied from 1 to 10 ?m. The concentration of SiO2 nanoparticles was changed within the range of 0.25 and 4.00 wt%, while the nanoparticles size varied from 5 to 100 nm. It was shown that filtration of drilling fluids with nanoparticles inclusions depends on their concentration, size and material, the concentration and size of microparticles and the pore sizes of ceramic filters. The addition of the nanoparticles leads to a significant reduction in filtration of a microsuspension and affects the structure and thickness of a cake formed on the surface of a filter. The main novelty of this work lies in the fact that the effect of the addition of nanoparticles on filtration losses depends on the ratio between nano and microparticles. It was shown that the positive effect of nanoparticle additives on filtration losses is determined not only by the properties of nanoparticles (size and concentration), but also by the properties of microparticles contained in the drilling
fluid
, as well as the characteristics of the rock (pore size). © 2019 Elsevier B.V.
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Держатели документа:
Siberian Federal University, 79 Svobodny Prospect, Krasnoyarsk, 660041, Russian Federation
Kutateladze Institute of Thermophysics, SB RAS, 1 Academica Lavrentyeva Prospect, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch Russian Academy of Sciences, 50/38 Academgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Minakov, A. V.; Mikhienkova, E. I.; Voronenkova, Y. O.; Neverov, A. L.; Zeer, G. M.; Zharkov, S. M.; Жарков, Сергей Михайлович
}
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5.
Raman study of
decomposition of Na-bearing carbonates in water
fluid
at high P–T parameters / S. Goryainov, A. Krylov, U. Borodina [et al.]> // Spectrochim. Acta - A: Mol. Biomol. Spectrosc. - 2024. -
Vol. 322
. - Ст. 124801,
DOI
10.1016/j.saa.2024.124801. - Cited References: 74. - Authors thank V.S. Shevchenko, A.F. Shatskiy, A.G. Sokol and A.V. Golovin for fruitful discussion. We acknowledge I.N. Kupriyanov for discussion and measurements of FTIR spectra of the samples. This work was carried out within the framework of the Russian Federation state assignment of the Sobolev Institute of Geology and Mineralogy SB RAS (state registration number: 122041400176-0) and A.K., S.K and A.V. thanks for support the Russian Federation state assignment of Kirensky Institute of Physics, Federal Research Center KSC SB RAS (state registration number: FWES-2024-0003). Work partially supported by the Russian Foundation for Basic Researches (RFBR-21-55-14001 ANF a grant). Equipment and devices of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” were used for Raman experiments at high P–T conditions . - ISSN 1386-1425. - ISSN 1873-3557
Кл.слова (ненормированные):
Raman spectroscopy
--
Carbonates
--
High pressure
--
High temperature
--
Abiogenic formation of organics
--
Organic formates
--
Organic molecular crystals
Аннотация:
The study of Na-carbonates stability and their transformations in aqueous carbonate
fluid
under high P–T conditions is relevant from the point of view of the understanding geochemical processes of the Na-assisted carbon circulation in the Earth’s crust and subduction zones. In situ Raman study of Na-bearing carbonate-water-Fe-metal system in diamond anvil cell (DAC) at high P–T conditions revealed that carbonates decompose with abiogenic formation of formates and other organic compounds that differs from behavior of carbonates in dry system. XRD and FTIR methods have been used additionaly to determine the phase composition. Na-bearing carbonates (nahcolite NaHCO3, shortite Na2Ca2(CO3)3 and cancrinite Na7Ca[(CO3)1.5Al6Si6O24]·2H2O) in aqueous
fluid
decompose to form simple carbonates and formates (as dominant organic molecules) at moderate P–T parameters (above ∼0.2 GPa, 200°C). Our experimental results directly confirm the hypothesis of Horita and Berndt (Science, 1999) about possible yield of organic formates in the carbonate-water-metal system. Nahcolite NaHCO3 in aqueous
fluid
in the presence of Fe metal decomposes into anhydrous phases: natrite γ-Na2CO3, siderite, magnetite (due to dissolution of Fe steel gasket), Na-formate and likely organic molecular crystalline solvate of Na-formate and methyl formate. Shortite decays into anhydrous phases: aragonite CaCO3, Na-Ca-formates and an amorphous phase. Cancrinite decomposes to unidentified carbonate-alumonosilicate phases, Na-Ca-formates and unknown organic molecular crystal. Magnetite is also formed in this system due to dissolution of Fe steel gasket used in DAC. The present study provides a new insight in processes of abiogenic formation of organic matter from carbonates in the crust and upper mantle.
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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prospect Acad. Koptyug 3, Novosibirsk, 630090, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, bld. 38, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Goryainov, S.; Krylov, A. S.; Крылов, Александр Сергеевич; Borodina, U.; Likhacheva, A.; Krylova, S. N.; Крылова, Светлана Николаевна; Seryotkin, Yu.; Bogdanov, N.; Vtyurin, A. N.; Втюрин, Александр Николаевич; Grishina, S.
}
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6.
Kolovsky, A. R.
Persistent current of atoms in a ring optical lattice / A. R. Kolovsky> // New J. Phys. - 2006. -
Vol. 8
. - Ст. 197,
DOI
10.1088/1367-2630/8/9/197. - Cited References: 22 . - ISSN 1367-2630
РУБ
Physics, Multidisciplinary
Рубрики:
SUPERFLUIDITY
Кл.слова (ненормированные):
Fluid
dynamics
--
Random processes
--
Spectrum analysis
--
High energy spectra
--
Quasimomentum
--
Random matrix theory
--
High energy physics
Аннотация:
We consider a small ensemble of Bose atoms in a ring optical lattice with weak disorder. The atoms are assumed to be initially prepared in a superfluid state with nonzero quasimomentum and, hence, may carry matter current. It is found that the atomic current persists in time for a low value of the quasimomentum but decays exponentially for a high (around one quarter of the Brillouin zone) quasimomentum. The explanation is given in terms of low- and high-energy spectra of the Bose-Hubbard model, which we describe using the Bogoliubov and random matrix theories, respectively.
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Держатели документа:
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, 01187 Dresden, Germany
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Коловский, Андрей Радиевич
}
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7.
Optical textures and
orientational structures of nematic and cholesteric droplets with heterogeneous boundary conditions / O. O. Prishchepa [et al.]> // Mol. Cryst. Liquid Cryst. - 2008. -
Vol. 489
,
Is. 1
. - P. 84-93,
DOI
10.1080/15421400802219817. - Cited Reference Count: 17. - Гранты: This work was supported in part by the grants of DSP, No 2.1.1.1814; RFBR, No 0803-01007; Council of the President of the RF for Support of Young Scientists and Leading Scientific Schools (projects NSh-3818-2008.3, MK-3624.2007.2); RAS, No 8.1, 2.10.2; SB RAS, No 33. - Финансирующая организация: DSP [2.1.1.1814]; RFBR [0803-01007]; Young Scientists and Leading Scientific Schools [NSh-3818-2008.3, MK-3624.2007.2]; RAS [8.1, 2.10.2]; SB RAS [33] . - ISSN 1542-1406
Рубрики:
LIQUID-CRYSTAL DROPLETS
ELECTRIC-FIELD
BIPOLAR
Кл.слова (ненормированные):
director configuration
--
interfaces
--
nematic and cholesteric droplets
--
surfactant
--
Director configuration
--
Interfaces
--
Nematic and cholesteric droplets
--
Surfactant
--
Boundary value problems
--
Drop formation
--
Drops
--
Fluid
mechanics
--
Phospholipids
--
Surface active agents
--
Boundary conditioning
--
Director configuration
--
Homeotropic
--
Interfaces
--
Nematic and cholesteric droplets
--
Nematic droplets
--
Nematics
--
Optical textures
--
Orientational structures
--
Surface anchoring
--
Surfactant
--
Boundary conditions
Аннотация:
Brief review of the orientational structures within the droplets of chiral as well as achiral nematics with the heterogeneous boundary conditions is reported. The modification of boundary conditions in the 5CB/polyvinylbutyral and LN-396/cholesterylacetate/polyvinylbutyral compositions with the planar anchoring at the interface is created by addition of the homeotropic surfactant (lecithin). Sequences of the novel stable and non-stable orientational structures being realized within the droplets of achiral nematic are presented. For the LN-396 nematic droplets doped by cholesterylacetate the formation of a spherulite structure has been shown when the tangential surface anchoring is modified to the homeotropic one.
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Держатели документа:
Siberian Fed Univ Krasnoyarsk, Krasnoyarsk Sci Ctr, SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
L.V. Kirensky Institut of physics
Доп.точки доступа:
Prishchepa, O. O.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Gardymova, A. P.; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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8.
Loginov, V. M.
On the theory of homogeneous turbulence in
fluid
with internal rotations / V. M. Loginov> // Z. Phys. B-Condens. Mat. - 1980. -
Vol. 37
,
Is. 4
. - P. 363-368,
DOI
10.1007/BF01352748. - Cited References: 19 . - ISSN 0722-3277
РУБ
Physics, Condensed Matter
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Держатели документа:
L.V. Kirensky Institute of Physics, USSR Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russia
}
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9.
Vasil'ev, E. N.
Numerical simulation of the spatial structure of a moving arc discharge / E. N. Vasil'ev, D. A. Nesterov> // High Temp. - 2008. -
Vol. 46
,
Is. 6
. - P. 746-751,
DOI
10.1134/S0018151X08060023. - Cited References: 9 . - ISSN 0018-151X
РУБ
Physics, Applied
Кл.слова (ненормированные):
52
--
80
--
Mg
--
Cavity resonators
--
Computer simulation
--
Discharge (
fluid
mechanics)
--
Magnetic fields
--
Three dimensional
--
Arc discharges
--
Current strengths
--
Experimental datums
--
Gas flows
--
Magnetogasdynamics
--
Numerical simulations
--
Parallel electrodes
--
Physical parameters
--
Spatial shapes
--
Spatial structures
--
State processes
--
Transverse magnetic fields
--
Electric discharges
Аннотация:
Results are given of the calculation of the structure of an arc discharge moving on parallel electrodes in air under the effect of a transverse magnetic field (0.086 T) at a current strength of 320 A. The numerical simulation is performed within an unsteady-state three-dimensional mathematical model of radiation magnetogasdynamics. The calculations reveal that fluctuations of values of physical parameters and of spatial shape of arc arise in the arc, which are caused by the gas flow past the discharge column and by unsteady-state processes in the electrode regions. Comparison is made with the available experimental data.
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Держатели документа:
[Vasil'ev, E. N.
Nesterov, D. A.] Russian Acad Sci, Inst Computat Modeling, Siberian Div, Krasnoyarsk 660036, Russia
ИВМ СО РАН
Institute of Computational Modeling, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 60036, Russian Federation
Доп.точки доступа:
Nesterov, D. A.; Васильев, Евгений Николаевич
}
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10.
Nanosecond Electromagnetic sounding
of a
fluid
-saturated layered Formation [Text] / Epov M.I.*1, 2, 2, 3, Mironov V.L., Komarov S.A., Muzalevsky K.V.> // Russian Geology and Geophysics. - 2007. -
Т. 48
,
№12
. - P1054-1060
Аннотация:
Mathematical modeling was applied to study attenuation of a nanosecond pulse that propagated in an oil-bearing formation and was reflected from the oil-gas or oil-water interfaces. The problem was formulated and solved for propagation of a short electromagnetic Gaussian pulse in a layered hydrocarbon reservoir in the case of excitation by a long electric line. Complex permittivity of oil-bearing rocks was calculated using a refractive mixing dielectric model for oil, saline water, methane, quartz, and bentonite in each layer. We obtained and analyzed space-time diagrams of wave propagation and reflection and estimated effective attenuation for both cases
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Публикация на русском языке
Электромагнтное зондирование флюидонасыщенного слоистого коллектора наносекундными импульсами [Текст] / Эпов М.И., Миронов В.Л., Комаров С.А., Музалевский К.В. // Геология и геофизика. - 2007. - Т. 48 №12. - С. 1357-1365
Держатели документа:
Institute of Petroleum Geology and Geophysics, Siberian Branch, the RAS, 3 prosp. Akad. Koptyuga
Institute of Physics, Siberian Branch of the RAS, 50, str. 38
Altai State University, 61 ul. Lenina
Доп.точки доступа:
Epov, M. I.; Mironov, V. L.; Миронов, Валерий Леонидович; Komarov, S. A.; Muzalevsky, K. V.; Музалевский, Константин Викторович
}
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11.
Mikhailov, A. G.
Mass transfer of base metals in upward penetration of solutions in tailing dumps / A. G. Mikhailov, I. I. Vashlaev, E. V. Morozov> // J. Min. Sci. - 2022. -
Vol. 58
,
Is. 6
. - P. 1033-1039,
DOI
10.1134/S1062739122060187. - Cited References: 20. - This study was performed within the State Assignment of the Institute of Chemistry and Chemical Technology, SB RAS, project no. 0287-2021-0014 using the equipment provided by Krasnoyarsk Regional Center for Collective Use, FRC KSC SB RAS . - ISSN 1062-7391. - ISSN 1573-8736
Кл.слова (ненормированные):
mass transfer
--
upward capillary flow
--
dissolving
--
leaching
--
fluid
--
permeation
Аннотация:
The article describes the studies into the process of upward mass transfer in flotation tailings with water solutions. The swift-flowing geological process is investigated using the magnetic resonance imaging. The kinetics of water-soluble minerals as well as the structure and substance transformations in the body of tailings are studied for substantiating in-situ formation of the target concentration zones at the tailings surface.
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Михайлов А. Г. Массоперенос цветных металлов при восходящей фильтрации растворов в массиве хвостохранилища [Текст] / А. Г. Михайлов, И. И. Вашлаев, Е. В. Морозов // Физ.-техн. проблемы разраб. полез. ископаемых. - 2022. - № 6. - С. 160-167
Держатели документа:
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia
Доп.точки доступа:
Vashlaev, I. I.; Morozov, E. V.; Морозов, Евгений Владимирович
}
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12.
Magneto-optical study of
Friedericksz threshold in polymer dispersed nematic liquid crystals / O. O. Prishchepa [et al.]> //
Mol. Cryst. Liquid Cryst. - 2008. -
Vol. 488
,
Is. 1
. - P. 309-316,
DOI
10.1080/15421400802241167. - Cited Reference Count: 11 . - ISSN 1542-1406
Рубрики:
Кл.слова (ненормированные):
Friedericksz threshold
--
nematic
--
magneto-optics
--
polymer dispersed liquid crystals
--
surface anchoring
--
Friedericksz threshold
--
Magneto-optics
--
Nematic
--
Polymer dispersed liquid crystals
--
Surface anchoring
--
Computer systems
--
Crystallography
--
Drop formation
--
Drops
--
Fluid
mechanics
--
Light sources
--
Liquid crystals
--
Magnetos
--
Optical engineering
--
Powders
--
Approximate formulas
--
Calculation data
--
Computer modelling
--
Friedericksz threshold
--
Magneto-optical
--
Magneto-optics
--
Measured values
--
Nematic
--
Nematic droplets
--
Poly vinyl butyral
--
Polymer dispersed liquid crystals
--
Reorientation processes
--
Surface anchoring
--
Threshold fields
--
Nematic liquid crystals
Аннотация:
A computer model of reorientation processes in the bipolar nematic droplets of ellipsoidal form with strong tangential anchoring has been developed. The approximate formula to estimate the Friedericksz threshold has been obtained when the operating field (electric or magnetic) is orthogonal to the bipolar axis. The dependence of the threshold field on the droplet form has been considered. The reorientation of the bipolar droplets of 5CB nematic liquid crystal dispersed in polyvinylbutyral has been studied by the magneto-optical method. The calculation data are in good agreement with measured values of the threshold field.
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Держатели документа:
Siberian Fed Univ, SB RAS, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Prishchepa, O. O.; Parshin, A. M.; Паршин, Александр Михайлович; Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; International Topical Meeting on Optics of Liquid Crystals(12th ; OCT 01-05, 2007 ; Puebla, MEXICO)
}
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13.
Iron carbide as
a source of carbon for graphite and diamond formation under lithospheric mantle P-T parameters / Y. V. Bataleva [et al.]> // Lithos. - 2017. -
Vol. 286-287
. - P. 151-161,
DOI
10.1016/j.lithos.2017.06.010. - Cited References: 57. - This work was supported by the Russian Foundation for Basic Research (project No. 16-35-60024) and by a State Assignment (project no. 0330-2016-0007). The authors thank the editor Marco Scambelluri, the reviewer Fabrizio Nestola and an anonymous reviewer for their helpful and constructive reviews. The authors thank A. Moskalev and M. Jolivet for their assistance in the work preparation, A. Sokol and A. Khokhryakov for useful suggestions throughout the study, S. Ovchinnikov for his assistance in implementation of the Mössbauer spectroscopy measurements. . - ISSN 0024-4937
Перевод заглавия:
Карбид железа как источник углерода для образования графита и алмаза при Р-Т параметрах литосферной мантии
Кл.слова (ненормированные):
Iron carbide
--
Graphite
--
Diamond
--
Sulfur-rich
fluid
--
Mantle sulfides
--
High-pressure experiment
Аннотация:
Experimental modeling of natural carbide-involving reactions, implicated in the graphite and diamond formation and estimation of the iron carbide stability in the presence of S-bearing fluids, sulfide melts as well as mantle silicates and oxides, was performed using a multi-anvil high-pressure split-sphere apparatus. Experiments were carried out in the carbide-sulfur (Fe3C-S), carbide-sulfur-oxide (Fe3C-S-SiO2-MgO) and carbide-sulfide (Fe3C-FeS2) systems, at pressure of 6.3 GPa, temperatures in the range of 900–1600 °C and run time of 18–40 h. During the interaction of cohenite with S-rich reduced
fluid
or pyrite at 900–1100 °C, extraction of carbon from carbide was realized, resulting in the formation of graphite in assemblage with pyrrhotite and cohenite. At higher temperatures complete reaction of cohenite with newly-formed sulfide melt was found to produce metal-sulfide melt with dissolved carbon (Fe64S27C9 (1200 °C)–Fe54S40C6 (1500 °C), at.%), which acted as a crystallization medium for graphite (1200–1600 °C) and diamond growth on seeds (1300–1600 °C). Reactions of cohenite and oxides with S-rich reduced
fluid
resulted in the formation of graphite in assemblage with highly ferrous orthopyroxene and pyrrhotite (900–1100 °C) or in hypersthene formation, as well as graphite crystallization and diamond growth on seeds in the Fe-S-C melt (1200–1600 °C). We show that the main processes of carbide interaction with S-rich
fluid
or sulfide melt are recrystallization of cohenite (900–1100 °C), extraction of carbon and iron in the sulfide melt, and graphite formation and diamond growth in the metal-sulfide melt with dissolved carbon. Our results evidence that iron carbide can act as carbon source in the processes of natural graphite and diamond formation under reduced mantle conditions. We experimentally demonstrate that cohenite in natural environments can be partially consumed in the reactions with mantle silicates and oxides, and is absolutely unstable in the presence of S-bearing reduced
fluid
or sulfide melt at temperatures higher than 1100 °C, under lithospheric mantle pressures.
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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Koptyug ave 3, Novosibirsk, Russian Federation
Novosibirsk State University, Pirogova str 2, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Y. N.; Borzdov, Y. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Zdrokov, E. V.
}
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14.
Erkaev, N. V.
Ideal magnetohydrodynamic flow around a blunt body under anisotropic pressure / N. V. Erkaev, H. K. Biernat, C. J. Farrugia> // Phys. Plasmas. - 2000. -
Vol. 7
,
Is. 8
. - P. 3413-3420,
DOI
10.1063/1.874205. - Cited References: 23 . - ISSN 1070-664X
РУБ
Physics, Fluids & Plasmas
Рубрики:
MHD FLOW
MAGNETOSHEATH
DEPLETION
CLOSURE
FLUID
MODEL
Аннотация:
The plasma flow past a blunt obstacle in an ideal magnetohydrodynamic (MHD) model is studied, taking into account the tensorial nature of the plasma pressure. Three different closure relations are explored and compared with one another. The first one is the adiabatic model proposed by Chew, Goldberger, and Low. The second closure is based on the mirror instability criterion, while the third depends on an empirical closure equation obtained from observations of solar wind flow past the Earth's magnetosphere. The latter is related with the criterion of the anisotropic ion cyclotron instability. In the presented model, the total pressure, defined as the sum of magnetic pressure and perpendicular plasma pressure, is assumed to be a known function of Cartesian coordinates. The calculation is based on the Newtonian approximation for the total pressure along the obstacle and on a quadratic behavior with distance from the obstacle along the normal direction. Profiles of magnetic field strength and plasma parameters are presented along the stagnation stream line between the shock and obstacle of an ideal plasma flow with anisotropy in thermal pressure and temperature. (C) 2000 American Institute of Physics. [S1070- 664X(00)04407-4].
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Держатели документа:
Russian Acad Sci, Inst Computat Modelling, Krasnoyarsk 660036, Russia
Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria
Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA
ИВМ СО РАН
Доп.точки доступа:
Biernat, H. K.; Farrugia, C. J.; Еркаев, Николай Васильевич
}
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15.
Graphite and diamond
formation in the carbide–oxide–carbonate interactions (Experimental modeling under mantle P,T-conditions) / Y. Bataleva [et al.]> // Minerals. - 2018. -
Vol. 8
,
Is. 11
. - Ст. 522,
DOI
10.3390/min8110522. - Cited References: 67. - The authors express their sincere thanks to the in-house Editor, the guest Academic Editor, and three anonymous Reviewers for helpful and constructive reviews. The authors thank S. Ovchinnikov for his assistance in implementation of Mössbauer spectroscopy measurements and A. Moskalev for his assistance in the work preparation. . - ISSN 2075-163X
Перевод заглавия:
Образование графита и алмаза при взаимодействиях карбид-оксид-карбонат (экспериментальное моделирование в Р,Т-условиях мантии)
Кл.слова (ненормированные):
Cohenite
--
Graphite
--
Diamond
--
CO2
fluid
--
Carbonate
--
Garnet
--
Experiment
--
High pressure
--
Lithospheric mantle
--
Metasomatism
Аннотация:
Experimental modeling of the formation of graphite and diamond as a result of carbide–
fluid
interactions was performed in the Fe3C–SiO2–Al2O3–(Mg,Ca)CO3 systems at 6.3 and 7.5 GPa and 1100–1650 °C. In the experiments with ƒO2-gradient (7.5 GPa, 1250–1350 °C), graphite + magnesiowüstite + garnet ± cohenite assemblage was formed. Graphite was produced through the redox interactions of carbide with carbonate or CO2 (reducing conditions), and redox reactions of magnesiowüstite and CO2 (oxidizing conditions). At 1450–1650 °C, crystallization of graphite, garnet, magnesiowüstite and ferrospinel, as well as generation of Fe2+,3+-rich carbonate–silicate melt occurred. This melt, saturated with carbon, acted as a medium of graphite crystallization and diamond growth on seeds. In the experiments without ƒO2-gradient (6.3 GPa), decarbonation reactions with the formation of CO2-
fluid
and Fe,Mg,Ca-silicates, as well as C0-producing redox reactions of CO2-
fluid
with cohenite were simultaneously realized. As a result, graphite (± diamond growth) was formed in assemblage with Fe2+,Fe3+,Mg-silicates and magnetite (1100–1200 °C), or with Fe3+-rich garnet and orthopyroxene (1300–1500 °C). It has been established that a potential mechanism for the crystallization of graphite or diamond growth is the oxidation of cohenite by CO2-
fluid
to FeO and Fe3O4, accompanied by the extraction of carbon from Fe3C and the corresponding reduction of CO2 to C0.
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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Koptyug ave 3, Novosibirsk, 630090, Russian Federation
Department of Geology and Geophysics, Novosibirsk State University, Pirogova str 2, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Bataleva, Y.; Palyanov, Y.; Borzdov, Y.; Novoselov, I.; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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16.
Morozov, E. V.
From components to phase-dependent dynamics of diffusivity in wax solutions subjected to
fluid
-solid phase transition: Insights from Pulsed Field Gradient NMR / E. V. Morozov, P. V. Nizovtseva, O. N. Martyanov> // Energy Fuels. - 2022. -
Vol. 36
,
Is. 24
. - P. 14696-14709,
DOI
10.1021/acs.energyfuels.2c02943. - Cited References: 76. - The present research was performed with the financial support of the Russian Science Foundation (project no. 21-13-00171, http://rscf.ru/project/21-13-00171/) . - ISSN 0887-0624. - ISSN 1520-5029
Кл.слова (ненормированные):
Concentration ranges
--
Crystal networks
--
Diffusion components
--
Fluid
-solid phase transition
--
N-dodecane
--
Phase dependent
--
Pulsed field gradient NMR
--
Supplementary information
--
Wax appearance temperature
--
Wax crystals
Аннотация:
The evolution of solvent and solute diffusivity during
fluid
-solid phase transition was studied in model wax in n-dodecane solutions in a wide concentration range. Studied systems were characterized using viscosity measurements to provide supplementary information related to wax precipitation onset, while diffusion coefficients of n-dodecane and paraffin molecules were quantified using Pulsed Field Gradient (PFG) NMR. It was revealed that above the wax appearance temperature (WAT), the Hayduk-Minhas equation adequately predicts the solute and solvent diffusivity. At lower temperatures (below the WAT), three distinct diffusive components appear, which no longer originate from individual molecular components but correspond to a liquid phase differing in terms of association to the wax crystal network. These diffusion components were concluded to contain dodecane and the residual dissolved wax; the major components among them correspond to
fluid
, which relatively freely diffuses between the wax microcrystals and experiences the hindrance due to the wax gel network, and the minor components correspond to the
fluid
closely associated with the wax crystals. Unlike at high temperatures, the Hayduk-Minhas equation was found to be unable to predict adequately the diffusivity below the WAT. Using Singh's approach, the aspect ratio of wax crystals was calculated for different temperatures and concentrations and its complex nonlinear behavior was observed. It turned out that none of the models available differentiate the fluids with respect to the wax crystal network that leaves out of modeling the diffusion components with reduced mobility. The results indicate that the intuitive paradigm of component-dependent dynamics of solvent and solute diffusivity should be changed to phase-dependent dynamics once the system turns into wax gel since the diffusion of separate components becomes the diffusion of separate phases. This understanding shows a new route to improving the wax deposition modeling, which will facilitate an increase of effectiveness of the remedial strategies in the petroleum industry.
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Держатели документа:
Institute of Chemistry and Chemical Technology, Federal Research Center, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Federal Research Center, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsky Rabochy Ave. 31, Krasnoyarsk, 660037, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Ak. Lavrentieva 5, Novosibirsk, 630090, Russian Federation
Доп.точки доступа:
Nizovtseva, P. V.; Martyanov, O. N.; Морозов, Евгений Владимирович
}
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17.
Experimental modeling of
C0-forming processes involving cohenite and CO2-
fluid
in a silicate mantle / Yu. V. Bataleva [et al.]> // Dokl. Earth Sci. - 2018. -
Vol. 483
,
Is. 1
. - P. 1427–1430,
DOI
10.1134/S1028334X18110016. - Cited References: 15. - This work was supported by the Russian Foundation for Basic Research (project no. 16–35–60024) and was performed as part of a State Assignment (project no. 0330–2016–0007). . - ISSN 1028-334X. - ISSN 1531-8354
Аннотация:
Experimental studies were performed in the Fe3C–SiO2–(Mg,Ca)CO3 system (6.3 GPа, 1100–1500°C, 20–40 h). It is established that the carbide–oxide–carbonate interaction leads to the formation of ferrosilite, fayalite, graphite, and cohenite (1100 and 1200°С), as well as a Fe–C melt (1300°С). It is determined that the main processes in the system are decarbonation, redox-reactions of cohenite and a CO2-
fluid
, extraction of carbon from carbide, and crystallization of metastable graphite (± diamond growth), as well as the formation of ferriferous silicates. The interaction studied can be considered as a simplified model of the processes that occur during the subduction of oxidized crustal material to reduced mantle rocks.
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Публикация на русском языке
Экспериментальное моделирование углеродпродуцирующих процессов с участием когенита и СО-флюида в условиях силикатной мантии / Ю. В. Баталева [и др.] // Докл. Акад. наук. - 2018. - Т. 483 № 1. - С. 84-88
Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Novosibirsk State University, Novosibirsk, Russia
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.
}
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18.
Dynamical immiscibility of
aqueous carbonate
fluid
in the shortite-water system at high-pressure-temperature conditions / S. V. Goryainov, S. N. Krylova, U. O. Borodina, A. S. Krylov> // J. Phys. Chem. C. - 2021. -
Vol. 125
,
Is. 33
. - P. 18501-18509,
DOI
10.1021/acs.jpcc.1c05077. - Cited References: 47. - The reported study was funded by the RFBR and DFG, project number 21-52-12018. Work is done on the state assignment of the Sobolev Institute of Geology and Mineralogy, Kirensky Institute of Physics SB RAS, Equipment of Federal Research Center of Krasnoyarsk Science Center SB RAS, and supported by the Ministry of Science and Higher Education. Authors thank A.N. Vtyurin, A.G. Sokol, A.Yu. Likhacheva, and A.F. Shatskiy for fruitful discussion . - ISSN 1932-7447. - ISSN 1932-7455
РУБ
Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
SIMULTANEOUSLY HIGH-PRESSURE
SODIUM FORMATE
RAMAN-SPECTRA
Аннотация:
Anhydrous carbonate shortite, Na2Ca2(CO3)3, compressed in water at high pressure–temperature (up to 5 GPa, 350 °C) was studied by Raman spectroscopy. At 3.2 GPa and 250 °C, shortite begins to dissolve, followed by crystallization of aragonite and aragonite’. The unusual behavior of aqueous carbonate
fluid
was observed at 4.8 GPa and 300–350 °C. This process is characterized by the active formation of microbubbles within 2–60 s that are inserted one into another. Microbubbles are considered to be a result of the two immiscible
fluid
stratification. This dynamical immiscibility of the
fluid
accompanies the appearance of several crystalline carbonates and organic molecular crystals. Na-formate and some polymorphs of Ca-formate were observed.
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Держатели документа:
Sobolev Inst Geol & Mineral SB RAS, Novosibirsk 630090, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Goryainov, Sergey, V; Krylova, S. N.; Крылова, Светлана Николаевна; Borodina, Ulyana O.; Krylov, A. S.; Крылов, Александр Сергеевич; RFBRRussian Foundation for Basic Research (RFBR); DFGGerman Research Foundation (DFG)European Commission [21-52-12018]; Ministry of Science and Higher EducationMinistry of Science and Higher Education, PolandEuropean Commission
}
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19.
Conditions of formation
of iron-carbon melt inclusions in garnet and orthopyroxene under P-T conditions of lithospheric mantle / Y. V. Bataleva [et al.]> // Petrology. - 2018. -
Vol. 26
,
Is. 6
. - P. 565-574,
DOI
10.1134/S0869591118060024. - Cited References: 45. - This work was supported by the Russian Foundation for Basic Research (project no. 16-35-60024) and a State Assignment (project no. 0330-2016-0007). . - ISSN 0869-5911. - ISSN 1556-2085
РУБ
Geosciences, Multidisciplinary + Mineralogy
Рубрики:
EARTHS LOWER MANTLE
DIAMOND FORMATION
DEEP MANTLE
PHYSICOCHEMICAL PARAMETERS
Кл.слова (ненормированные):
high-pressure experiment
--
metal-carbon melt
--
graphite
--
diamond
--
CO2-
fluid
--
mantle silicates
--
mantle metasomatism
Аннотация:
Of great importance in the problem of redox evolution of mantle rocks is the reconstruction of scenarios of alteration of Fe0- or Fe3C-bearing rocks by oxidizing mantle metasomatic agents and the evaluation of stability of these phases under the influence of fluids and melts of different compositions. Original results of high-temperature high-pressure experiments (P = 6.3 GPa, T = 1300–1500°С) in the carbide–oxide–carbonate systems (Fe3C–SiO2–(Mg,Ca)CO3 and Fe3C–SiO2–Al2O3–(Mg,Ca)CO3) are reported. Conditions of formation of mantle silicates with metallic or metal–carbon melt inclusions are determined and their stability in the presence of CO2-
fluid
representing the potential mantle oxidizing metasomatic agent are estimated. It is established that garnet or orthopyroxene and CO2-
fluid
are formed in the carbide–oxide–carbonate system through decarbonation, with subsequent redox interaction between CO2 and iron carbide. This results in the formation of assemblage of Fe-rich silicates and graphite. Garnet and orthopyroxene contain inclusions of a Fe–C melt, as well as graphite, fayalite, and ferrosilite. It is experimentally demonstrated that the presence of CO2-
fluid
in interstices does not affect on the preservation of metallic inclusions, as well as graphite inclusions in silicates. Selective capture of Fe–C melt inclusions by mantle silicates is one of the potential scenarios for the conservation of metallic iron in mantle domains altered by mantle oxidizing metasomatic agents.
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Условия образования включений железо-углеродного расплава в гранатах и ортопироксенах при P-T параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Петрология. - 2018. - Т. 26 № 6. - С. 571-582
Держатели документа:
Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk, Russia.
Novosibirsk State Univ, Novosibirsk, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk, Russia.
Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Novoselov, I. D.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.; Russian Foundation for Basic Research [16-35-60024]; [0330-2016-0007]
}
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20.
Bound states in
the continuum in open acoustic resonators / A. A. Lyapina [et al.]> // J.
Fluid
Mech. - 2015. -
Vol. 780
. - P. 370-387,
DOI
10.1017/jfm.2015.480. - Cited References: 48. - This work has been supported by Russian Science Foundation through grant 14-12-00266. . - ISSN 0022-1120
Перевод заглавия:
Связанное состояние в континууме в открытом акустическом резонаторе
РУБ
Mechanics + Physics, Fluids & Plasmas
Рубрики:
TRAPPED MODES
FANO RESONANCES
COMPLEX RESONANCES
PARALLEL PLATES
SIDE-BRANCHES
WAVE-GUIDES
ABSORPTION
TRANSPORT
CHANNELS
SYSTEM
Кл.слова (ненормированные):
aeroacoustics
--
noise control
--
wave scattering
Аннотация:
We consider bound states in the continuum (BSCs) or embedded trapped modes in two- and three-dimensional acoustic axisymmetric duct-cavity structures. We demonstrate numerically that, under variation of the length of the cavity, multiple BSCs occur due to the Friedrich-Wintgen two-mode full destructive interference mechanism. The BSCs are detected by tracing the resonant widths to the points of the collapse of Fano resonances where one of the two resonant modes acquires infinite life-time. It is shown that the approach of the acoustic coupled mode theory cast in the truncated form of a two-mode approximation allows us to analytically predict the BSC frequencies and shape functions to a good accuracy in both two and three dimensions. © 2015 Cambridge University Press.
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Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Lyapina, A. A.; Ляпина, Алина Андреевна; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович
}
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полный формат
краткий формат
все найденные
отмеченные
кроме отмеченных
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