Труды сотрудников ИВМ СО РАН

/ O. A. Khlybov, I. I. Ryzhkov, T. P. Lyubimova // Eur. Phys. J. E. - 2015. - Vol. 38, Is. 4, DOI 10.1140/epje/i2015-15029-0 . - ISSN 1292-8941
Аннотация: Abstract: The paper is devoted to processing the data of DCMIX 1 space experiment. In this experiment, the Optical digital interferometry was used to measure the diffusion and Soret coefficients in the ternary mixture of 1,2,3,4-tetrahydronaphthalene, isobutylbenzene and n-dodecane at mass fractions of 0.8/0.1/0.1 and at 25°C. The raw interferometric images were processed to obtain the temporal and spatial evolution of refractive indices for two laser beams of different wavelengths. The method for extracting the diffusion and thermal diffusion coefficients originally developed for optical beam deflection was extended to optical digital interferometry allowing for the spatial variation of refractive index along the diffusion path. The method was validated and applied to processing the data for Soret and diffusion steps in 5 experimental runs. The obtained results for the Soret coefficients and one of the eigenvalues of diffusion matrix showed acceptable agreement within each step. The second eigenvalue was not determined with sufficient accuracy. Graphical abstract: [Figure not available: see fulltext.]. © 2015, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.

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Держатели документа:
Institute of Continuous Media Mechanics, UB RAS, Koroleva St. 1Perm, Russian Federation
Institute of Computational Modelling, SB RASAkademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Ryzhkov, I.I.; Рыжков, Илья Игоревич; Lyubimova, T.P.

/ 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
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.

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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.

/ S. Kozlova [et al.] // Phys. Chem. Chem. Phys. - 2019. - Vol. 21, Is. 4. - P2140-2152, DOI 10.1039/c8cp06795c . - ISSN 1463-9076
Аннотация: Experimental data on Fick diffusion coefficients of ternary and higher mixtures depend on the reference frame; those which are in common use are associated with the average velocity either with respect to volume, mass or mole number. In this study, the dependence of diffusion coefficients on the reference frame is thoroughly analyzed for three ternary mixtures of different types. The first one, tetralin-isobutylbenzene-dodecane, can almost be considered as ideal, the second one, cyclohexane-toluene-methanol, exhibits liquid-liquid phase separation and the third one, water-ethanol-triethylene glycol, contains three associating species and is also strongly non-ideal. Experimental diffusion coefficient data sampled in the volume reference frame are transformed to the molar and mass reference frames. The required partial molar volumes are derived from present density measurements. Four additional mixtures are considered along a single or two composition paths. A highlight of this study is the existence of a strong similarity of the main diffusion coefficients in the volume and mass reference frames for all considered mixtures. When the excess volume is small, the coefficients in the molar reference frame are also similar. However, for the mixture with a large excess volume (containing water), the diffusion coefficients in the molar reference frame differ significantly, even indicating negative main diffusion coefficients. It is shown that negative main diffusion coefficients appear due to relatively large experimental uncertainties of cross diffusion coefficients, which are propagated and amplified by frame transformation. © 2019 the Owner Societies.

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Держатели документа:
Institute of Computational Modelling, SB RAS, 50/44 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Microgravity Research Center, Universite Libre de Bruxelles (ULB), CP-165/62, Av. F.D. Roosevelt 50, Brussels, B-1050, Belgium
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
Thermodynamics and Process Engineering, Technical University Berlin, Ernst-Reuter-Platz 1, Berlin, 10587, Germany

Доп.точки доступа:
Kozlova, S.; Mialdun, A.; Ryzhkov, I.; Janzen, T.; Vrabec, J.; Shevtsova, V.

/ Q. Galand [et al.] // J Chem Phys. - 2019. - Vol. 151, Is. 13. - Ст. 134502, DOI 10.1063/1.5100595 . - ISSN 0021-9606
Аннотация: The Soret coefficients of a set of ternary systems of 1,2,3,4-tetrahydronaphthalene (THN), isobutylbenzene (IBB), and n-dodecane (nC12) at 298.15 K were measured under microgravity condition aboard the International Space Station in the frame of the DCMIX1 experiment. The present work includes a comprehensive study of possible data processing sequences for the interpretation of interferometric Soret experiments in ternary systems. Several data processing methodologies are discussed. A significant concentration dependence of the Soret coefficients is observed. In the present study, we have obtained large and positive values for THN and negative ones for IBB in all investigated systems. A linear relation between the Soret coefficients of two components is derived for each system and allows validating experimentally the coefficients measured in other experiments. © 2019 Author(s).

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Держатели документа:
MRC, Universite Libre de Bruxelles, Department of Chemical Physics, Avenue F. D. Roosevelt, CP165/32, Brussels, B-1050, Belgium
Physikalisches Institut, Universitat Bayreuth, Bayreuth, 95440, Germany
Institute of Continuous Media Mechanics, UB RAS, Koroleva, 1, Perm, 614013, Russian Federation
Institute of Computational Modelling, SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Galand, Q.; Van Vaerenbergh, S.; Kohler, W.; Khlybov, O.; Lyubimova, T.; Mialdun, A.; Ryzhkov, I.; Shevtsova, V.; Triller, T.