[Text] : статья / V. K. Andreev // Book of abstracts Sixth Int. conf. «Two-Phase Systems for Ground and Space Applications». - 2011. - p. 62
Доп.точки доступа:
Andreev V.K.
Труды сотрудников ИВМ СО РАН
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Найдено документов в текущей БД: 42
Effects of vibrations on dynamics of miscible liquids
[Text] / Y. Gaponenko, V. Shevtsova // Acta Astronaut. - 2010. - Vol. 66, Is. 01.02.2013. - pp. 174-182, DOI 10.1016/j.actaastro.2009.05.019. - Cited References: 10
. - ISSN 0094-5765
РУБ Engineering, Aerospace
Аннотация: We report on a numerical study of the mixing of two miscible fluids in gravitationally stable configuration. In the absence of external forces the diffusion process leads to the mixing of species. The aim of this study is to analyze the physical mechanism by which vibrations affect the mixing characteristic of two stratified miscible fluids. The translational periodic vibrations of a rigid cell filled with different mixtures of water-isopropanol are imposed. The vibrations with a constant frequency and amplitude are directed along the interface. In absence of gravity vibration-induced mass transport is incomparably faster than in diffusion regime. Our results highlight the strong interplay between gravity and vibrational impact, the relative weight of each effect is determined by ratio vibrational and classical Rayleigh numbers. (C) 2009 Elsevier Ltd. All rights reserved.
Доп.точки доступа:
Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Shevtsova, V.
Аннотация: We report on a numerical study of the mixing of two miscible fluids in gravitationally stable configuration. In the absence of external forces the diffusion process leads to the mixing of species. The aim of this study is to analyze the physical mechanism by which vibrations affect the mixing characteristic of two stratified miscible fluids. The translational periodic vibrations of a rigid cell filled with different mixtures of water-isopropanol are imposed. The vibrations with a constant frequency and amplitude are directed along the interface. In absence of gravity vibration-induced mass transport is incomparably faster than in diffusion regime. Our results highlight the strong interplay between gravity and vibrational impact, the relative weight of each effect is determined by ratio vibrational and classical Rayleigh numbers. (C) 2009 Elsevier Ltd. All rights reserved.
Доп.точки доступа:
Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Shevtsova, V.
The IVIDIL experiment onboard the ISS: Thermodiffusion in the presence of controlled vibrations
[Text] : статья / V. Shevtsova [et al.] // Comptes Rendus Mécanique. - 2011. - Vol. 339, Iss. 5. - p. 310–317DOI 10.1016/j.crme.2011.03.007
. -
Кл.слова (ненормированные):
Diffusion -- Thermodiffusion -- Soret effect -- Vibrations -- Microgravity -- Experiment -- Interferometry
Аннотация: The IVIDIL (Influence of VIbrations on DIffusion in Liquids) experiment was aimed at utilizing the International Space Station for investigating the effects of vibrations on liquid diffusion and thermodiffusion. The SODI-IVIDIL project of ESA is gathering together European, Canadian and Russian researchers with complementary skills to prepare and carry out the experiment, to process the raw data and perform numerical modeling of the phenomena. The experiment IVIDIL started on the October 5, 2009. In total 55 experimental runs were successfully completed by 20 January, 2010. A general description of the ISS facility related to the diffusion experiments and accessible for European researchers is briefly presented and some details about IVIDIL instrument are given. The scientific interest of this short article is focused on one of the objectives of the experiment: performing precise measurements of diffusion and thermodiffusion coefficients for binary mixtures in the absence of gravity. We demonstrate possibility of the experimental environment and report on the first results related to measurements of mass transport coefficients in the mixture with the negative Soret effect: 10% isopropanol (IPA)–90% water.
Полный текст на сайте правообладателя
Доп.точки доступа:
Shevtsova, V.; Mialdun, A.; Melnikov, D.; Ryzhkov, I.I.; Рыжков, Илья Игоревич; Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Saghir, Z.; Lyubimova, T.; Legros, J.C.
Кл.слова (ненормированные):
Diffusion -- Thermodiffusion -- Soret effect -- Vibrations -- Microgravity -- Experiment -- Interferometry
Аннотация: The IVIDIL (Influence of VIbrations on DIffusion in Liquids) experiment was aimed at utilizing the International Space Station for investigating the effects of vibrations on liquid diffusion and thermodiffusion. The SODI-IVIDIL project of ESA is gathering together European, Canadian and Russian researchers with complementary skills to prepare and carry out the experiment, to process the raw data and perform numerical modeling of the phenomena. The experiment IVIDIL started on the October 5, 2009. In total 55 experimental runs were successfully completed by 20 January, 2010. A general description of the ISS facility related to the diffusion experiments and accessible for European researchers is briefly presented and some details about IVIDIL instrument are given. The scientific interest of this short article is focused on one of the objectives of the experiment: performing precise measurements of diffusion and thermodiffusion coefficients for binary mixtures in the absence of gravity. We demonstrate possibility of the experimental environment and report on the first results related to measurements of mass transport coefficients in the mixture with the negative Soret effect: 10% isopropanol (IPA)–90% water.
Полный текст на сайте правообладателя
Доп.точки доступа:
Shevtsova, V.; Mialdun, A.; Melnikov, D.; Ryzhkov, I.I.; Рыжков, Илья Игоревич; Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Saghir, Z.; Lyubimova, T.; Legros, J.C.
Influence vibration on diffusion and thermodiffusion in liquids: IVIDIL experiment on the ISS
[Text] : тезисы / V.Shevtsova [et al.] // Abstracts of 4-th Int. symp. on Physical Sciences in Space. - 2011. - p. 36
Доп.точки доступа:
Shevtsova, V.; Sechenyh, V.; Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Melnikov, D.; Mialdun, A.; Mazzoni, S.
Доп.точки доступа:
Shevtsova, V.; Sechenyh, V.; Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Melnikov, D.; Mialdun, A.; Mazzoni, S.
Experimental and numerical analysis of mass transfer in a binary mixture with Soret effect in the presence of weak convection
[Text] / Y. . Gaponenko, A. . Mialdun, V. . Shevtsova // Eur. Phys. J. E. - 2014. - Vol. 37, Is. 10. - Ст. 90, DOI 10.1140/epje/i2014-14090-5. - Cited References: 18. - This work is supported by the PRODEX programme of the Belgian Federal Science Policy Office and ESA.
. - ISSN 1292-8941. - ISSN 1292-895X
РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Physics, Applied + Polymer Science
Аннотация: One of the targets of the experiment IVIDIL (Influence Vibrations on Diffusion in Liquids) conducted on-board ISS was to study the response of binary mixtures to vibrational forcing when the density gradient results from thermal and compositional variations. Compositional variations were created by the Soret effect and can strengthen or weaken the overall density gradient and, consequently, the response to vibrational forcing. We present the results of two experimental runs conducted on-board ISS in the frame of the experiment IVIDIL for low and strong vibrational forcing. The experimental observations revealed that a significant mean flow is set within 2 minutes after imposing vibrations and later in time it varies weakly and slowly due to the Soret effect. A mathematical model has been developed to compute the thermal and concentration fields in the experiment IVIDIL and verify the accuracy of picture processing based on the classical approach used in non-convective systems with the Soret effect. The effect of temperature and concentrations perturbations by joint action of vibrational convection and Soret effect on long time scale are carefully examined. The model demonstrates that image processing used for non-convective systems is suitable for the systems with vibration-affected thermodiffusion experiment.
WOS
Держатели документа:
[Gaponenko, Y.
Mialdun, A.
Shevtsova, V.] Univ Libre Bruxelles, MRC, EP CP 165 62, B-1050 Brussels, Belgium
[Gaponenko, Y.] Inst Computat Modelling SB RAS, Krasnoyarsk 660036, Russia
ИВМ СО РАН
Доп.точки доступа:
Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Mialdun, A.; Shevtsova, V.; PRODEX programme of the Belgian Federal Science Policy Office; ESA
Аннотация: One of the targets of the experiment IVIDIL (Influence Vibrations on Diffusion in Liquids) conducted on-board ISS was to study the response of binary mixtures to vibrational forcing when the density gradient results from thermal and compositional variations. Compositional variations were created by the Soret effect and can strengthen or weaken the overall density gradient and, consequently, the response to vibrational forcing. We present the results of two experimental runs conducted on-board ISS in the frame of the experiment IVIDIL for low and strong vibrational forcing. The experimental observations revealed that a significant mean flow is set within 2 minutes after imposing vibrations and later in time it varies weakly and slowly due to the Soret effect. A mathematical model has been developed to compute the thermal and concentration fields in the experiment IVIDIL and verify the accuracy of picture processing based on the classical approach used in non-convective systems with the Soret effect. The effect of temperature and concentrations perturbations by joint action of vibrational convection and Soret effect on long time scale are carefully examined. The model demonstrates that image processing used for non-convective systems is suitable for the systems with vibration-affected thermodiffusion experiment.
WOS
Держатели документа:
[Gaponenko, Y.
Mialdun, A.
Shevtsova, V.] Univ Libre Bruxelles, MRC, EP CP 165 62, B-1050 Brussels, Belgium
[Gaponenko, Y.] Inst Computat Modelling SB RAS, Krasnoyarsk 660036, Russia
ИВМ СО РАН
Доп.точки доступа:
Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Mialdun, A.; Shevtsova, V.; PRODEX programme of the Belgian Federal Science Policy Office; ESA
Combined Motion of Three Viscous Heat-conducting Liquids in a Flat Layer
[Текст] : статья / E. N. Lemeshkhova // Journal of Siberian Federal University. Mathematics & Physics = Журнал Сибирского федерального университета. Математика и физика. - 2013. - Т. 6, № 2. - С. 211-219
Перевод заглавия: Комбинированное движение трёх вязких теплопроводных жидкостей в плоском слое
Аннотация: Thejoint unidirectional motion of three viscousliquids undertheinfluence of thermocapillarityforces and pressure difference has been researched. An exact stationary solution of the problem has been found. The solution of the non — stationary problem has been obtained in the form of final analytical formulas in the image using the method of Laplace transformation. By the numerical inversion of Laplace transformation the evolution of the velocity fields and of the temperature perturbation to the stationary regime for specific liquids has been obtained.
Полный текст на сайте журнала
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Лемешкова, Елена Николаевна
Перевод заглавия: Комбинированное движение трёх вязких теплопроводных жидкостей в плоском слое
Аннотация: Thejoint unidirectional motion of three viscousliquids undertheinfluence of thermocapillarityforces and pressure difference has been researched. An exact stationary solution of the problem has been found. The solution of the non — stationary problem has been obtained in the form of final analytical formulas in the image using the method of Laplace transformation. By the numerical inversion of Laplace transformation the evolution of the velocity fields and of the temperature perturbation to the stationary regime for specific liquids has been obtained.
Полный текст на сайте журнала
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Лемешкова, Елена Николаевна
The evolution of the thermocapillary motion of three fluids in a plane layer
[Text] : статья / V. K. Andreev, Ye. N. Lemeshkhova // PMM JOURNAL OF APPLIED MATHEMATICS AND MECHANICS. - 2014. - Vol. 78, Iss. 4. - p. 341-347DOI 10.1016/j.jappmathmech.2014.12.004
. -
Аннотация: The unidirectional motion of three immiscible incompressible viscous heat-conducting liquids in a plane layer is considered. It is assumed that the motion occurs only under the action of thermocapillary forces from a state of rest. The analysis of the motion is reduced to solving linear conjugate initial boundary value problems for a system of parabolic equations. A non-stationary solution is sought by the Laplace transformation method and is obtained in the form of finite analytical expressions in transforms. It is proved that, as the time increases, the solution always reaches the steady state obtained earlier and an exponential estimate of the rate of convergence is given with an indicator which depends on the physical properties of the media and the layer thicknesses. The evolution of the velocity and temperature perturbation fields to a steady state for specific liquid media is obtained by numerical inversion of the Laplace transformation. (C) 2015 Elsevier Ltd. All rights reserved.
Доп.точки доступа:
Lemeshkhova, Ye.N.; Лемешкова, Елена Николаевна; Андреев, Виктор Константинович
Аннотация: The unidirectional motion of three immiscible incompressible viscous heat-conducting liquids in a plane layer is considered. It is assumed that the motion occurs only under the action of thermocapillary forces from a state of rest. The analysis of the motion is reduced to solving linear conjugate initial boundary value problems for a system of parabolic equations. A non-stationary solution is sought by the Laplace transformation method and is obtained in the form of finite analytical expressions in transforms. It is proved that, as the time increases, the solution always reaches the steady state obtained earlier and an exponential estimate of the rate of convergence is given with an indicator which depends on the physical properties of the media and the layer thicknesses. The evolution of the velocity and temperature perturbation fields to a steady state for specific liquid media is obtained by numerical inversion of the Laplace transformation. (C) 2015 Elsevier Ltd. All rights reserved.
Доп.точки доступа:
Lemeshkhova, Ye.N.; Лемешкова, Елена Николаевна; Андреев, Виктор Константинович
Mixing of liquids by vibrations - Preparation of the vipil experiment on the iss
[статья] : доклад, тезисы доклада / V. Shevtsova, Y. Gaponenko, A. Mialdun // Proceedings of the International Astronautical Congress, IAC. - 2012. - P. 791-796
РИНЦ,
Источник статьи
Доп.точки доступа:
Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Mialdun, A.; 63rd International Astronautical Congress 2012, IAC 2012 (2012 ; 01.10 - 05.10 ; Naples)
РИНЦ,
Источник статьи
Доп.точки доступа:
Gaponenko, Y.; Гапоненко, Юрий Анатольевич; Mialdun, A.; 63rd International Astronautical Congress 2012, IAC 2012 (2012 ; 01.10 - 05.10 ; Naples)
Benchmark values for the Soret, thermodiffusion and molecular diffusion coefficients of the ternary mixture tetralin+isobutylbenzene+n-dodecane with 0.8-0.1-0.1 mass fraction
/ M. M. Bou-Ali [et al.] // Eur. Phys. J. E. - 2015. - Vol. 38, Is. 4, DOI 10.1140/epje/i2015-15030-7
. - ISSN 1292-8941
Кл.слова (ненормированные):
Topical Issue: Thermal non-equilibrium phenomena in multi-component fluids -- Benzene -- Diffusion in liquids -- Diffusion in solids -- Eigenvalues and eigenfunctions -- Microgravity -- Microgravity processing -- Mixtures -- Thermal diffusion -- Thermal diffusion in liquids -- Digital interferometries -- Experimental techniques -- Microgravity conditions -- Molecular diffusion coefficient -- Multicomponent fluid -- Optical beam deflection -- Optical diagnostics -- Taylor dispersion technique -- Diffusion
Аннотация: Abstract: With the aim of providing reliable benchmark values, we have measured the Soret, thermodiffusion and molecular diffusion coefficients for the ternary mixture formed by 1,2,3,4-tetrahydronaphthalene, isobutylbenzene and n-dodecane for a mass fraction of 0.8-0.1-0.1 and at a temperature of 25°C. The experimental techniques used by the six participating laboratories are Optical Digital Interferometry, Taylor Dispersion technique, Open Ended Capillary, Optical Beam Deflection, Thermogravitational technique and Sliding Symmetric Tubes technique in ground conditions and Selectable Optical Diagnostic Instrument (SODI) in microgravity conditions. The measurements obtained in the SODI installation have been analyzed independently by four laboratories. Benchmark values are proposed for the thermodiffusion and Soret coefficients and for the eigenvalues of the diffusion matrix in ground conditions, and for Soret coefficients in microgravity conditions. Graphical abstract: [Figure not available: see fulltext.]. © 2015, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.
Scopus
Держатели документа:
Mechanical and Industrial Manufacturing Department, MGEP Mondragon Goi Eskola Politeknikoa, Loramendi 4 Apdo 23Mondragon, Spain
Dept. of Mechanical and industrial Engineering, Ryerson UniversityToronto, Canada
MRC, EP CP 165/62, Universite libre de Bruxelles (ULB)Brussels, Belgium
Physikalisches Institut, Universitat BayreuthBayreuth, Germany
Institute of Continuous Media Mechanics UB RASPerm, Russian Federation
Institute of Computational Modelling SB RASKrasnoyarsk, Russian Federation
Доп.точки доступа:
Bou-Ali, M.M.; Ahadi, A.; Alonso de Mezquia, D.; Galand, Q.; Gebhardt, M.; Khlybov, O.; Kohler, W.; Larranaga, M.; Legros, J.C.; Lyubimova, T.; Mialdun, A.; Ryzhkov, I.I.; Рыжков, Илья Игоревич; Saghir, M.Z.; Shevtsova, V.; Van Vaerenbergh, S.
Кл.слова (ненормированные):
Topical Issue: Thermal non-equilibrium phenomena in multi-component fluids -- Benzene -- Diffusion in liquids -- Diffusion in solids -- Eigenvalues and eigenfunctions -- Microgravity -- Microgravity processing -- Mixtures -- Thermal diffusion -- Thermal diffusion in liquids -- Digital interferometries -- Experimental techniques -- Microgravity conditions -- Molecular diffusion coefficient -- Multicomponent fluid -- Optical beam deflection -- Optical diagnostics -- Taylor dispersion technique -- Diffusion
Аннотация: Abstract: With the aim of providing reliable benchmark values, we have measured the Soret, thermodiffusion and molecular diffusion coefficients for the ternary mixture formed by 1,2,3,4-tetrahydronaphthalene, isobutylbenzene and n-dodecane for a mass fraction of 0.8-0.1-0.1 and at a temperature of 25°C. The experimental techniques used by the six participating laboratories are Optical Digital Interferometry, Taylor Dispersion technique, Open Ended Capillary, Optical Beam Deflection, Thermogravitational technique and Sliding Symmetric Tubes technique in ground conditions and Selectable Optical Diagnostic Instrument (SODI) in microgravity conditions. The measurements obtained in the SODI installation have been analyzed independently by four laboratories. Benchmark values are proposed for the thermodiffusion and Soret coefficients and for the eigenvalues of the diffusion matrix in ground conditions, and for Soret coefficients in microgravity conditions. Graphical abstract: [Figure not available: see fulltext.]. © 2015, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.
Scopus
Держатели документа:
Mechanical and Industrial Manufacturing Department, MGEP Mondragon Goi Eskola Politeknikoa, Loramendi 4 Apdo 23Mondragon, Spain
Dept. of Mechanical and industrial Engineering, Ryerson UniversityToronto, Canada
MRC, EP CP 165/62, Universite libre de Bruxelles (ULB)Brussels, Belgium
Physikalisches Institut, Universitat BayreuthBayreuth, Germany
Institute of Continuous Media Mechanics UB RASPerm, Russian Federation
Institute of Computational Modelling SB RASKrasnoyarsk, Russian Federation
Доп.точки доступа:
Bou-Ali, M.M.; Ahadi, A.; Alonso de Mezquia, D.; Galand, Q.; Gebhardt, M.; Khlybov, O.; Kohler, W.; Larranaga, M.; Legros, J.C.; Lyubimova, T.; Mialdun, A.; Ryzhkov, I.I.; Рыжков, Илья Игоревич; Saghir, M.Z.; Shevtsova, V.; Van Vaerenbergh, S.
The joint creeping motion of three viscid liquids in a plane layer: A priori estimates and convergence to steady flow
/ V. K. Andreev, N. Cheremnykh // J. Appl. Ind. Math. - 2016. - Vol. 10, Is. 1. - P7-20, DOI 10.1134/S1990478916010026
. - ISSN 1990-4789
Кл.слова (ненормированные):
a priori estimates -- asymptotic behavior -- conjugate initial-boundary value problem -- thermocapillarity -- Boundary value problems -- Estimation -- Heat conduction -- Initial value problems -- Liquids -- Nonlinear equations -- A-priori estimates -- Asymptotic behaviors -- Conducting liquid -- Immiscible liquids -- Initial-boundary value problems -- Invariant solutions -- Non-linear inverse problem -- Thermocapillarity -- Inverse problems
Аннотация: We study a partially invariant solution of rank 2 and defect 3 of the equations of a viscid heat-conducting liquid. It is interpreted as a two-dimensional motion of three immiscible liquids in a flat channel bounded by fixed solid walls, the temperature distribution on which is known. From a mathematical point of view, the resulting initial-boundary value problem is a nonlinear inverse problem. Under some assumptions (often valid in practical applications), the problem can be replaced by a linear problem. For the latter we obtain some a priori estimates, find an exact steady solution, and prove that the solution approaches the steady regime as time increases, provided that the temperature on the walls stabilizes. © 2016, Pleiades Publishing, Ltd.
Scopus
Держатели документа:
Institute of Computational Modelling, Akademgorodok 50, bld. 44, Krasnoyarsk, Russian Federation
Siberian Federal University, pr. Svobodnyi 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Andreev, V. K.; Cheremnykh, N.
Кл.слова (ненормированные):
a priori estimates -- asymptotic behavior -- conjugate initial-boundary value problem -- thermocapillarity -- Boundary value problems -- Estimation -- Heat conduction -- Initial value problems -- Liquids -- Nonlinear equations -- A-priori estimates -- Asymptotic behaviors -- Conducting liquid -- Immiscible liquids -- Initial-boundary value problems -- Invariant solutions -- Non-linear inverse problem -- Thermocapillarity -- Inverse problems
Аннотация: We study a partially invariant solution of rank 2 and defect 3 of the equations of a viscid heat-conducting liquid. It is interpreted as a two-dimensional motion of three immiscible liquids in a flat channel bounded by fixed solid walls, the temperature distribution on which is known. From a mathematical point of view, the resulting initial-boundary value problem is a nonlinear inverse problem. Under some assumptions (often valid in practical applications), the problem can be replaced by a linear problem. For the latter we obtain some a priori estimates, find an exact steady solution, and prove that the solution approaches the steady regime as time increases, provided that the temperature on the walls stabilizes. © 2016, Pleiades Publishing, Ltd.
Scopus
Держатели документа:
Institute of Computational Modelling, Akademgorodok 50, bld. 44, Krasnoyarsk, Russian Federation
Siberian Federal University, pr. Svobodnyi 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Andreev, V. K.; Cheremnykh, N.
Suppression of surface plasmon resonance in Au nanoparticles upon transition to the liquid state
/ V. S. Gerasimov [et al.] // Opt. Express. - 2016. - Vol. 24, Is. 23. - P26851-26856, DOI 10.1364/OE.24.026851
. - ISSN 1094-4087
Кл.слова (ненормированные):
Electron scattering -- Gold -- Lattice constants -- Liquids -- Melting -- Metal nanoparticles -- Nanoparticles -- Surface plasmon resonance -- Electron phonon couplings -- Experimental spectra -- Experimental values -- Gold Nanoparticles -- Nonlinear optical response -- Plasmonic nanoparticle -- Relaxation constants -- Surface plasmon frequency -- Plasmons
Аннотация: Significant suppression of resonant properties of single gold nanoparticles at the surface plasmon frequency during heating and subsequent transition to the liquid state has been demonstrated experimentally and explained for the first time. The results for plasmonic absorption of the nanoparticles have been analyzed by means of Mie theory using experimental values of the optical constants for the liquid and solid metal. The good qualitative agreement between calculated and experimental spectra support the idea that the process of melting is accompanied by an abrupt increase of the relaxation constants, which depends, beside electronphonon coupling, on electron scattering at a rising number of lattice defects in a particle upon growth of its temperature, and subsequent melting as a major cause for the observed plasmonic suppression. It is emphasized that observed effect is fully reversible and may underlie nonlinear optical responses of nanocolloids and composite materials containing plasmonic nanoparticles and their aggregates in conditions of local heating and in general, manifest itself in a wide range of plasmonics phenomena associated with strong heating of nanoparticles. © 2016 Optical Society of America.
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Смотреть статью
Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarskz, Russian Federation
Division of Theoretical Chemistry and Biology, Royal Institute of Technology, Stockholm, Sweden
Доп.точки доступа:
Gerasimov, V. S.; Ershov, A. E.; Gavrilyuk, A. P.; Karpov, S. V.; Agren, H.; Polyutov, S. P.
Кл.слова (ненормированные):
Electron scattering -- Gold -- Lattice constants -- Liquids -- Melting -- Metal nanoparticles -- Nanoparticles -- Surface plasmon resonance -- Electron phonon couplings -- Experimental spectra -- Experimental values -- Gold Nanoparticles -- Nonlinear optical response -- Plasmonic nanoparticle -- Relaxation constants -- Surface plasmon frequency -- Plasmons
Аннотация: Significant suppression of resonant properties of single gold nanoparticles at the surface plasmon frequency during heating and subsequent transition to the liquid state has been demonstrated experimentally and explained for the first time. The results for plasmonic absorption of the nanoparticles have been analyzed by means of Mie theory using experimental values of the optical constants for the liquid and solid metal. The good qualitative agreement between calculated and experimental spectra support the idea that the process of melting is accompanied by an abrupt increase of the relaxation constants, which depends, beside electronphonon coupling, on electron scattering at a rising number of lattice defects in a particle upon growth of its temperature, and subsequent melting as a major cause for the observed plasmonic suppression. It is emphasized that observed effect is fully reversible and may underlie nonlinear optical responses of nanocolloids and composite materials containing plasmonic nanoparticles and their aggregates in conditions of local heating and in general, manifest itself in a wide range of plasmonics phenomena associated with strong heating of nanoparticles. © 2016 Optical Society of America.
Scopus,
Смотреть статью
Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarskz, Russian Federation
Division of Theoretical Chemistry and Biology, Royal Institute of Technology, Stockholm, Sweden
Доп.точки доступа:
Gerasimov, V. S.; Ershov, A. E.; Gavrilyuk, A. P.; Karpov, S. V.; Agren, H.; Polyutov, S. P.
2D thermocapillary motion of three fluids in a flat channel
/ V. K. Andreev, E. N. Cheremnykh // J. Sib. Fed. Univ. Math. Phys. - 2016. - Vol. 9, Is. 4. - P404-415, DOI 10.17516/1997-1397-2016-9-4-404-415
. - ISSN 1997-1397
Кл.слова (ненормированные):
Interface -- Mathematical modeling -- Numerical experiments -- Thermocapillarity
Аннотация: Two-dimensional creeping motion of three immiscible, incompressible viscous fluids in a flat channel bounded by fixed solid walls, on which the temperature distribution is known, is investigated. The motion is induced only by the thermalcapillary forces beginning from the state of rest. Unsteady motion is described by finite analytic formulas obtained by Laplace transform in images. The evolution of the velocity fields to the stationary regime for specific liquids is obtained by the numerical inversion of Laplace transformation. © Siberian Federal University. All rights reserved.
Scopus,
Смотреть статью,
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Держатели документа:
Institute of computational modelling SB RAS, Akademgorodok, 50/44, Krasnoyarsk, Russian Federation
Institute of Mathematics and Computer Science, Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Andreev, V. K.; Cheremnykh, E. N.
Кл.слова (ненормированные):
Interface -- Mathematical modeling -- Numerical experiments -- Thermocapillarity
Аннотация: Two-dimensional creeping motion of three immiscible, incompressible viscous fluids in a flat channel bounded by fixed solid walls, on which the temperature distribution is known, is investigated. The motion is induced only by the thermalcapillary forces beginning from the state of rest. Unsteady motion is described by finite analytic formulas obtained by Laplace transform in images. The evolution of the velocity fields to the stationary regime for specific liquids is obtained by the numerical inversion of Laplace transformation. © Siberian Federal University. All rights reserved.
Scopus,
Смотреть статью,
WOS
Держатели документа:
Institute of computational modelling SB RAS, Akademgorodok, 50/44, Krasnoyarsk, Russian Federation
Institute of Mathematics and Computer Science, Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Andreev, V. K.; Cheremnykh, E. N.
Two Dimensional Thermocapillary Motion of Immiscible Viscous Liquids in Layer
[Text] : abstract / V. K. Andreev // Book of Abstracts International Symposium and School for Young Scientists «Interfacial Phenomena and Heat Transfer». - Novosibirsk : Kutateladze Institute of thermophysics SB RAS, 2016. - P70
Доп.точки доступа:
Андреев, Виктор Константинович
Доп.точки доступа:
Андреев, Виктор Константинович
Interfacial instability in miscible liquids induced by vibrations
[Text] : abstract / Y. Gaponenko, V. Shevtsova // Abstracts of IMA8 - 8th Conference of the International Marangoni Association. - 2016. - P30
Доп.точки доступа:
Shevtsova, V.; Гапоненко, Юрий Анатольевич
Доп.точки доступа:
Shevtsova, V.; Гапоненко, Юрий Анатольевич
Surface plasmon resonances in liquid metal nanoparticles
/ A. E. Ershov [et al.] // Appl Phys B. - 2017. - Vol. 123, Is. 6, DOI 10.1007/s00340-017-6755-2
. - ISSN 0946-2171
Кл.слова (ненормированные):
Aggregates -- Dimers -- Gold -- Liquids -- Metal nanoparticles -- Nanoparticles -- Nonlinear optics -- Silver -- Surface plasmon resonance -- Au nanoparticle -- Colloidal aggregates -- Experimental values -- Experimental verification -- Metallic nanoparticles -- Nonlinear optical response -- Plasmonic nanoparticle -- Surface plasmon frequency -- Plasmons
Аннотация: We have shown significant suppression of resonant properties of metallic nanoparticles at the surface plasmon frequency during the phase transition “solid–liquid” in the basic materials of nanoplasmonics (Ag, Au). Using experimental values of the optical constants of liquid and solid metals, we have calculated nanoparticle plasmonic absorption spectra. The effect was demonstrated for single particles, dimers and trimers, as well as for the large multiparticle colloidal aggregates. Experimental verification was performed for single Au nanoparticles heated to the melting temperature and above up to full suppression of the surface plasmon resonance. It is emphasized that this effect may underlie the nonlinear optical response of composite materials containing plasmonic nanoparticles and their aggregates. © 2017, Springer-Verlag Berlin Heidelberg.
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Держатели документа:
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, Russian Federation
L.V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Ershov, A. E.; Gerasimov, V. S.; Gavrilyuk, A. P.; Karpov, S. V.
Кл.слова (ненормированные):
Aggregates -- Dimers -- Gold -- Liquids -- Metal nanoparticles -- Nanoparticles -- Nonlinear optics -- Silver -- Surface plasmon resonance -- Au nanoparticle -- Colloidal aggregates -- Experimental values -- Experimental verification -- Metallic nanoparticles -- Nonlinear optical response -- Plasmonic nanoparticle -- Surface plasmon frequency -- Plasmons
Аннотация: We have shown significant suppression of resonant properties of metallic nanoparticles at the surface plasmon frequency during the phase transition “solid–liquid” in the basic materials of nanoplasmonics (Ag, Au). Using experimental values of the optical constants of liquid and solid metals, we have calculated nanoparticle plasmonic absorption spectra. The effect was demonstrated for single particles, dimers and trimers, as well as for the large multiparticle colloidal aggregates. Experimental verification was performed for single Au nanoparticles heated to the melting temperature and above up to full suppression of the surface plasmon resonance. It is emphasized that this effect may underlie the nonlinear optical response of composite materials containing plasmonic nanoparticles and their aggregates. © 2017, Springer-Verlag Berlin Heidelberg.
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Смотреть статью,
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Держатели документа:
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, Russian Federation
L.V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Ershov, A. E.; Gerasimov, V. S.; Gavrilyuk, A. P.; Karpov, S. V.
On the inverse problem of a creeping motion in thin layers
/ V. Andreev // CEUR Workshop Proceedings : CEUR-WS, 2017. - Vol. 1839: 2016 International Conference Mathematical and Information Technologies, MIT 2016 (28 August 2016 through 5 September 2016, ) Conference code: 127940. - P258-270
. -
Кл.слова (ненормированные):
A priori estimates -- Asymptotic behaviour -- Conjugate initial-boundary value problem -- Numerical simulation -- Thermocapillarity -- Boundary value problems -- Capillary flow -- Computer simulation -- Estimation -- Initial value problems -- Laplace transforms -- Nonlinear equations -- A-priori estimates -- Asymptotic behaviour -- Immiscible liquids -- Initial-boundary value problems -- Invariant solutions -- Numerical results -- Thermo-capillary forces -- Thermocapillarity -- Inverse problems
Аннотация: The new partially invariant solution of two-dimential motions of heated viscous liquid equations is considered. For factor-system arised the initial boundary value problem is formulated. This problem is inverse one and describing of common motion of two immiscible liquids in a plane channel under the action of thermocapillary forces. As Marangoni number is small (so-called creeping flow) the problem becomes the linear one. Some a priori estimates are obtained and input data conditions when solution tends to stationary one are found. In Laplace transforms the exact solution is obtained as quadratures and some numerical results of velocities behavior in layers are presented.
Scopus
Держатели документа:
Institute Computational Modelling SB RAS, Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Andreev, V.
Кл.слова (ненормированные):
A priori estimates -- Asymptotic behaviour -- Conjugate initial-boundary value problem -- Numerical simulation -- Thermocapillarity -- Boundary value problems -- Capillary flow -- Computer simulation -- Estimation -- Initial value problems -- Laplace transforms -- Nonlinear equations -- A-priori estimates -- Asymptotic behaviour -- Immiscible liquids -- Initial-boundary value problems -- Invariant solutions -- Numerical results -- Thermo-capillary forces -- Thermocapillarity -- Inverse problems
Аннотация: The new partially invariant solution of two-dimential motions of heated viscous liquid equations is considered. For factor-system arised the initial boundary value problem is formulated. This problem is inverse one and describing of common motion of two immiscible liquids in a plane channel under the action of thermocapillary forces. As Marangoni number is small (so-called creeping flow) the problem becomes the linear one. Some a priori estimates are obtained and input data conditions when solution tends to stationary one are found. In Laplace transforms the exact solution is obtained as quadratures and some numerical results of velocities behavior in layers are presented.
Scopus
Держатели документа:
Institute Computational Modelling SB RAS, Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Andreev, V.
Numerical analysis of acoustic waves in a liquid crystal taking into account couple-stress interaction
/ I. Smolekho, O. Sadovskaya, V. Sadovskii // CEUR Workshop Proceedings : CEUR-WS, 2017. - Vol. 1839: 2016 International Conference Mathematical and Information Technologies, MIT 2016 (28 August 2016 through 5 September 2016, ) Conference code: 127940. - P473-486
. -
Кл.слова (ненормированные):
Couple-stress medium -- CUDA technology -- Dynamics -- Finite-difference scheme -- Liquid crystal -- Parallel computational algorithm -- Boundary conditions -- Differential equations -- Dynamics -- Finite difference method -- Liquid crystals -- Liquids -- Computational algorithm -- Couple stress medium -- CUDA technologies -- Finite difference scheme -- Numerical computations -- Numerical solution -- System of equations -- Thermo-mechanical behaviors -- C (programming language)
Аннотация: Based on the mathematical model describing the thermomechanical behavior of a liquid crystal, which takes into account the couple-stress interactions, the system of two differential equations for tangential stress and angular velocity was obtained in two-dimensional case. Computational algorithm for numerical solution of this system of equations of the second order under given initial data and boundary conditions is worked out. The algorithm is implemented as a parallel program in the C language using the CUDA technology for computer systems with graphic accelerators. A series of numerical computations of acoustical waves in a liquid crystal was carried out to demonstrate the efficiency of proposed parallel program.
Scopus
Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok 50/44, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Smolekho, I.; Sadovskaya, O.; Sadovskii, V.
Кл.слова (ненормированные):
Couple-stress medium -- CUDA technology -- Dynamics -- Finite-difference scheme -- Liquid crystal -- Parallel computational algorithm -- Boundary conditions -- Differential equations -- Dynamics -- Finite difference method -- Liquid crystals -- Liquids -- Computational algorithm -- Couple stress medium -- CUDA technologies -- Finite difference scheme -- Numerical computations -- Numerical solution -- System of equations -- Thermo-mechanical behaviors -- C (programming language)
Аннотация: Based on the mathematical model describing the thermomechanical behavior of a liquid crystal, which takes into account the couple-stress interactions, the system of two differential equations for tangential stress and angular velocity was obtained in two-dimensional case. Computational algorithm for numerical solution of this system of equations of the second order under given initial data and boundary conditions is worked out. The algorithm is implemented as a parallel program in the C language using the CUDA technology for computer systems with graphic accelerators. A series of numerical computations of acoustical waves in a liquid crystal was carried out to demonstrate the efficiency of proposed parallel program.
Scopus
Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok 50/44, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Smolekho, I.; Sadovskaya, O.; Sadovskii, V.
Решение некоторых обратных задач для специальных движений вязкой жидкости
[Текст] : доклад, тезисы доклада / Виктор Константинович Андреев // Некоторые актуальные проблемы современной математики и математического образования : материалы научной конференции Герценовские чтения LXIX. - Санкт-Петербург : Российский государственный педагогический университет им. А.И. Герцена, 2016. - С. 260
. - ISBN 978-5-8064-2234-8
Перевод заглавия: Solution of some special inverse problem for the motion of viscous fluids
Кл.слова (ненормированные):
conjugate problem -- inverse problem -- apriori estimates -- exponential stability -- сопряжённая задача -- обратная задача -- априорные оценки -- экспоненциальная устойчивость
Аннотация: Исследуется линейная сопряжённая обратная задача для параболических уравнений, возникающая при описании ползущих двумерных движений вязких теплопроводных жидкостей или бинарных смесей в плоских слоях. Получены априорные оценки решения и найдены условия на входные данные, когда с ростом времени решение выходит на стационарный режим. В образах по Лапласу построено точное решение в виде квадратур и приведены численные результаты для конкретных жидких сред.
A linear conjugate inverse problem for parabolic equations is investigated. This problem arises under describing of creeping 2D motions of viscous heat conducting liquids or binary mixtures in plane layers. Some a priori estimates are obtained and input data conditions when solution tends to stationary one are found. In Laplace transforms the exact solution is obtained as quadratures and some numerical results for real liquids are calculated.
РИНЦ,
Источник статьи
Держатели документа:
Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук, Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Андреев, Виктор Константинович; Andreev V. K.; Герценовские чтения LXIX "Некоторые актуальные проблемы современной математики и математического образования"(2016 ; 11.04 - 15.04 ; Санкт-Петербург)
Нет сведений об экземплярах (Источник в БД не найден)
Перевод заглавия: Solution of some special inverse problem for the motion of viscous fluids
Кл.слова (ненормированные):
conjugate problem -- inverse problem -- apriori estimates -- exponential stability -- сопряжённая задача -- обратная задача -- априорные оценки -- экспоненциальная устойчивость
Аннотация: Исследуется линейная сопряжённая обратная задача для параболических уравнений, возникающая при описании ползущих двумерных движений вязких теплопроводных жидкостей или бинарных смесей в плоских слоях. Получены априорные оценки решения и найдены условия на входные данные, когда с ростом времени решение выходит на стационарный режим. В образах по Лапласу построено точное решение в виде квадратур и приведены численные результаты для конкретных жидких сред.
A linear conjugate inverse problem for parabolic equations is investigated. This problem arises under describing of creeping 2D motions of viscous heat conducting liquids or binary mixtures in plane layers. Some a priori estimates are obtained and input data conditions when solution tends to stationary one are found. In Laplace transforms the exact solution is obtained as quadratures and some numerical results for real liquids are calculated.
РИНЦ,
Источник статьи
Держатели документа:
Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук, Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Андреев, Виктор Константинович; Andreev V. K.; Герценовские чтения LXIX "Некоторые актуальные проблемы современной математики и математического образования"(2016 ; 11.04 - 15.04 ; Санкт-Петербург)
Нет сведений об экземплярах (Источник в БД не найден)
Dynamo models created on the planets under the influence of tidal forces of the satellite and the sun
/ V. A. Kochnev // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM : International Multidisciplinary Scientific Geoconference, 2017. - Vol. 17: 17th International Multidisciplinary Scientific Geoconference, SGEM 2017 (29 June 2017 through 5 July 2017, ) Conference code: 130800, Is. 62. - P899-906, DOI 10.5593/sgem2017/62/S28.115
. -
Кл.слова (ненормированные):
Planetary dynamo -- Sources of fluid flow -- Tidal forces -- Flow of fluids -- Fluids -- Interactive devices -- Interplanetary flight -- Liquids -- Magnetic fields -- Magnetism -- Planets -- Plasma diagnostics -- Satellites -- Solar system -- Correlation coefficient -- Correlation value -- High temperature -- Main magnetic fields -- Planetary dynamos -- Planetary rotation -- Temperature differences -- Tidal forces -- Orbits
Аннотация: It is known that the movement of the liquid core creates electric currents, inducing a main magnetic field of the planet. The liquid core of the high temperature becomes ionized plasma (plasma), which It is quasi-neutral (not neutral) - by definition. One of the major geodynamo questions: what is the source of strength, causing fluid movement in the core of the planet? Many authors have investigated geodynamo: planetary rotation around its axis, the temperature difference and pressure as well as the Coriolis force. Moffatt (1980), at the end of his book, as expressed the problem mentioned above “… For example, it is not yet known that the ultimate source energy is the basic movements of the Earth’s disk Dynamo”. In this study, the role of the driving forces of the liquid core considered tidal forces created axial rotation of the planet and the influence of external objects (the Sun and planets, satellites). The value of the tidal force on the equator of the planet depends on the radius and the period of the axial rotation of the planet, mass, radius and the orbital period of the satellite around the planet. The paper presents the formula and the results of the calculation of tidal forces and forecast the relative values equatorial magnetic fields of the planets all the planets of the solar system. The interpretation of the results illustrated with drawings. The new version of the dynamo It helps to explain the reasons high intensity magnetic Jupiter's field compared to Saturn’s fields, Uranus and Neptune, and much more Earth field intensity compared with fields of Venus, Mercury and Mars. The calculations of the correlation values the magnetic field at the equator: on the model according to the forecast and observations on the planets. Correlation coefficient is 0.997, that indicates a close relationship observed and estimates fields, and this is indirect evidence of the correctness of the adopted model. © SGEM2017 All Rights Reserved.
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Держатели документа:
Institute of Computational Modelling of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Kochnev, V. A.
Кл.слова (ненормированные):
Planetary dynamo -- Sources of fluid flow -- Tidal forces -- Flow of fluids -- Fluids -- Interactive devices -- Interplanetary flight -- Liquids -- Magnetic fields -- Magnetism -- Planets -- Plasma diagnostics -- Satellites -- Solar system -- Correlation coefficient -- Correlation value -- High temperature -- Main magnetic fields -- Planetary dynamos -- Planetary rotation -- Temperature differences -- Tidal forces -- Orbits
Аннотация: It is known that the movement of the liquid core creates electric currents, inducing a main magnetic field of the planet. The liquid core of the high temperature becomes ionized plasma (plasma), which It is quasi-neutral (not neutral) - by definition. One of the major geodynamo questions: what is the source of strength, causing fluid movement in the core of the planet? Many authors have investigated geodynamo: planetary rotation around its axis, the temperature difference and pressure as well as the Coriolis force. Moffatt (1980), at the end of his book, as expressed the problem mentioned above “… For example, it is not yet known that the ultimate source energy is the basic movements of the Earth’s disk Dynamo”. In this study, the role of the driving forces of the liquid core considered tidal forces created axial rotation of the planet and the influence of external objects (the Sun and planets, satellites). The value of the tidal force on the equator of the planet depends on the radius and the period of the axial rotation of the planet, mass, radius and the orbital period of the satellite around the planet. The paper presents the formula and the results of the calculation of tidal forces and forecast the relative values equatorial magnetic fields of the planets all the planets of the solar system. The interpretation of the results illustrated with drawings. The new version of the dynamo It helps to explain the reasons high intensity magnetic Jupiter's field compared to Saturn’s fields, Uranus and Neptune, and much more Earth field intensity compared with fields of Venus, Mercury and Mars. The calculations of the correlation values the magnetic field at the equator: on the model according to the forecast and observations on the planets. Correlation coefficient is 0.997, that indicates a close relationship observed and estimates fields, and this is indirect evidence of the correctness of the adopted model. © SGEM2017 All Rights Reserved.
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Смотреть статью
Держатели документа:
Institute of Computational Modelling of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Kochnev, V. A.
Analysis of the velocity profile in lake shira in summer using principal component analysis
/ O. Voldko, L. Kompaniets, L. Gavrilova // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM : International Multidisciplinary Scientific Geoconference, 2017. - Vol. 17: 17th International Multidisciplinary Scientific Geoconference, SGEM 2017 (29 June 2017 through 5 July 2017, ) Conference code: 130796, Is. 31. - P831-838, DOI 10.5593/sgem2017/31/S15.105
. -
Кл.слова (ненормированные):
Principal component analysis -- Velocity profile -- Lakes -- Velocity -- Homogeneous liquids -- Horizontal velocity -- Local measurement -- Long-term measurements -- Modern technologies -- Principal Components -- Stationary motions -- Velocity profiles -- Principal component analysis
Аннотация: The development of modern technologies allows us to solve the problem of carrying out long-term measurements of velocity and temperature in lakes. The long-term local measurements of velocity have been conducted in Lake Shira (Khakassia) in the period 2014-2015.The velocity profile along the column of the liquid in Lake Shira occurs due to density summer stratification and wind. The horizontal velocities vary greatly in depth as well as in time. The principal component method has been performed to analyze the horizontal velocities. This method is widely used to evaluate complex space-time structures, since it allowsto describe the data compactly.The obtained data have been decomposed into empirically determined modes with different scales. This makes it possible to extract dominant modes in the data and in some cases to determine the corresponding physical process.The first empirical modes in all measures are analogous to the Ekman spiral of the stationary motion of a homogeneous liquid and the remaining modes can correspond to internal waves. © SGEM2017 All Rights Reserved.
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Держатели документа:
IO AB RAS, Kaliningrad, Russian Federation
ICM SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Voldko, O.; Kompaniets, L.; Gavrilova, L.
Кл.слова (ненормированные):
Principal component analysis -- Velocity profile -- Lakes -- Velocity -- Homogeneous liquids -- Horizontal velocity -- Local measurement -- Long-term measurements -- Modern technologies -- Principal Components -- Stationary motions -- Velocity profiles -- Principal component analysis
Аннотация: The development of modern technologies allows us to solve the problem of carrying out long-term measurements of velocity and temperature in lakes. The long-term local measurements of velocity have been conducted in Lake Shira (Khakassia) in the period 2014-2015.The velocity profile along the column of the liquid in Lake Shira occurs due to density summer stratification and wind. The horizontal velocities vary greatly in depth as well as in time. The principal component method has been performed to analyze the horizontal velocities. This method is widely used to evaluate complex space-time structures, since it allowsto describe the data compactly.The obtained data have been decomposed into empirically determined modes with different scales. This makes it possible to extract dominant modes in the data and in some cases to determine the corresponding physical process.The first empirical modes in all measures are analogous to the Ekman spiral of the stationary motion of a homogeneous liquid and the remaining modes can correspond to internal waves. © SGEM2017 All Rights Reserved.
Scopus,
Смотреть статью
Держатели документа:
IO AB RAS, Kaliningrad, Russian Federation
ICM SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Voldko, O.; Kompaniets, L.; Gavrilova, L.