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Relevant bibliographies by topics / Diffusion, binary liquid mixtures

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Academic literature on the topic 'Diffusion, binary liquid mixtures'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Diffusion, binary liquid mixtures"

1

Duursma, Gail, Khellil Sefiane, and Joy Clarke. "Diffusion-Evaporation Studies of Binary Mixtures in Capillary Tubes." Defect and Diffusion Forum 273-276 (February 2008): 577–82. http://dx.doi.org/10.4028/www.scientific.net/ddf.273-276.577.

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Evaporation in restricted domains, e.g. in capillaries, is of industrial importance but is poorly understood. Where the evaporating liquid is a binary mixture, preferential evaporation of the more volatile component occurs initially and the evaporation rate is not constant, indeed it appears to occur in stages. Experiments of evaporation from the entrance of a capillary were performed for various binary mixtures of acetone and water and for pure liquids for comparison. Measurements of mass were taken over time for a range of capillary diameters from 0.6 mm to 2 mm. For simplicity, the experiments were performed with the meniscus “stationary” at the entrance of the tube, rather than allowing the meniscus to recede. The data were analysed and showed that, for the binary mixtures, the evaporation process had two distinct stages for the mixtures. The second stage always had a lower slope than the first, indicating a slower evaporation (similar multistage evaporation processes have been observed for sessile drops of binary mixtures). There are many phenomena at work in this process: surface evaporation; diffusion (or natural convective mass transfer) in the air beyond the capillary; diffusion in the binary mixture; circulation in the liquid; thermal effects of evaporative cooling. These are investigated, comparisons made and further studies are proposed.

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MacGowan, David. "Simulation of diffusion coefficients in binary liquid mixtures." Molecular Physics 59, no. 5 (December 10, 1986): 1017–26. http://dx.doi.org/10.1080/00268978600102541.

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Siddiqi, Mohammad Aslam, Werner Krahn, and Klaus Lucas. "Mutual diffusion coefficients in some binary liquid mixtures." Journal of Chemical & Engineering Data 32, no. 1 (January 1987): 48–50. http://dx.doi.org/10.1021/je00047a013.

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Berg, Rolf W., Susanne Brunsgaard Hansen, Alexander A. Shapiro, and Erling H. Stenby. "Diffusion Measurements in Binary Liquid Mixtures by Raman Spectroscopy." Applied Spectroscopy 61, no. 4 (April 2007): 367–73. http://dx.doi.org/10.1366/000370207780466316.

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Hsu, Yu-Du, and Yan-Ping Chen. "Correlation of the mutual diffusion coefficients of binary liquid mixtures." Fluid Phase Equilibria 152, no. 1 (October 1998): 149–68. http://dx.doi.org/10.1016/s0378-3812(98)00375-6.

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Pertler, Manfred, Eckhart Blass, and Geoffrey W. Stevens. "Fickian diffusion in binary mixtures that form two liquid phases." AIChE Journal 42, no. 4 (April 1996): 910–20. http://dx.doi.org/10.1002/aic.690420403.

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McKeigue, Kevin, and Erdogan Gulari. "Effect of molecular association on diffusion in binary liquid mixtures." AIChE Journal 35, no. 2 (February 1989): 300–310. http://dx.doi.org/10.1002/aic.690350215.

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Wang, K. S., P. Yuan, and M. Schwartz. "Reorientation diffusion of hexafluorobenzene and benzene in binary liquid mixtures." Spectrochimica Acta Part A: Molecular Spectroscopy 49, no. 7 (July 1993): 1035–37. http://dx.doi.org/10.1016/0584-8539(93)80231-x.

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Weingärtner, Hermann. "The Microscopic Basis of Self Diffusion - Mutual Diffusion Relationships in Binary Liquid Mixtures." Berichte der Bunsengesellschaft für physikalische Chemie 94, no. 3 (March 1990): 358–64. http://dx.doi.org/10.1002/bbpc.19900940331.

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Bouchaudy, Anne, Charles Loussert, and Jean-Baptiste Salmon. "Steady microfluidic measurements of mutual diffusion coefficients of liquid binary mixtures." AIChE Journal 64, no. 1 (August 8, 2017): 358–66. http://dx.doi.org/10.1002/aic.15890.

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Dissertations / Theses on the topic "Diffusion, binary liquid mixtures"

1

Zhu, Qingyong, Geoffrey D. Moggridge, and Carmine D’Agostino. "A local composition model for the prediction of mutual diffusion coefficients in binary liquid mixtures from tracer diffusion coefficients: A local composition model for the prediction of mutual diffusioncoefficients in binary liquid mixtures from tracer diffusion coefficients." Diffusion fundamentals 24 (2015) 58, S. 1, 2015. https://ul.qucosa.de/id/qucosa%3A14577.

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Zhu, Qingyong, Geoffrey D. Moggridge, and Carmine D’Agostino. "A local composition model for the prediction of mutual diffusion coefficients in binary liquid mixtures from tracer diffusion coefficients." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-198798.

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Guenoun, Patrick. "Instabilite des melanges de fluides : influence des forces de pesanteur et de mouillage." Paris 6, 1987. http://www.theses.fr/1987PA066127.

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Di, Felice Renzo. "Liquid fluidisation of binary-solid mixtures." Thesis, University College London (University of London), 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362618.

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Parghi, Deven D. "Antiferroelectric liquid crystals : hosts and binary mixtures." Thesis, University of Hull, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397062.

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Bribesh, Fathi. "Free surface films of binary liquid mixtures." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/9810.

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Model-H is used to describe structures found in the phase separation in films of binary liquid mixture that have a surface that is free to deform and also may energetically prefer one of the components. The film rests on a solid smooth substrate that has no preference for any component. On the one hand the study focuses on static aspects by investigating steady states that are characterised by their concentration and film height profiles. A large variety of such states are systematically analysed by numerically constructing bifurcation diagrams in dependence of a number of control parameters. The numerical method used is based on minimising the free energy functional at given constraints within a finite element method for a variable domain shape. The structure of the bifurcation diagrams is related to the symmetry properties of the individual solutions on the various branches. On the other hand the full time dependent model-H is linearised about selected steady states, in particular, the laterally invariant, i.e.\ layered states. The resulting dispersion relations are discussed and related to the corresponding bifurcation points of the steady states. In general, the results do well agree and confirm each other. The described analysis is performed for a number of important cases whose comparison allows us to gain an advanced understanding of the system behaviour: We distinguish the critical and off-critical case that correspond to zero and non-zero mean concentration, respectively. In the critical case the investigation focuses on (i) flat films without surface bias, (ii) flat films with surface bias, (iii) height-modulated films without surface bias, and (iv) height-modulated films with surface bias. Each case is analysed for several mean film heights and (if applicable) energetic bias at the free surface using the lateral domain size as main control parameter. Linear stability analyses of layered films and symmetry considerations are used to understand the structures of the determined bifurcation diagrams. For off-critical mixtures our study is more restricted. There we consider height-modulated films without and with surface bias for several mean film heights and (if applicable) energetic bias employing the mean concentration as main control parameter.

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Bartle, Elizabeth Anne. "The polymorphism of binary lipid mixtures." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305427.

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Stevar, M. S. P. "Dissolution dynamics of liquid/liquid binary mixtures in porous media." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/349974/.

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In this project has been undertaken an experimental study aimed at understanding the dissolution dynamics of binary mixtures within porous media. The porous medium can be roughly represented as a network of capillary tubes. This allowed for the initial research to be focused on understanding the dissolution dynamics of binary mixtures (i.e. glycerol/water, soybean oil/hexane, and isobutyric acid/water) within single capillary tubes. Further, the dissolution process was investigated within a 2D micromodel built as a network of capillary tubes. In the experiments with the capillary tubes, the dissolution (i.e. the interfacial mass transfer) could be isolated from the hydrodynamic motion while using glycerol/water and soybean oil/hexane binary mixtures. Despite the fact that these are fully miscible liquids, the interface could be observed for rather long time periods. In particular, two phase boundaries were observed moving from the ends into the middle section of the capillary tube with the speeds v∼D^1/3t^-2/3d^2(D, t and d are the coefficient of diffusion, time and diameter of the capillary tube, respectively). The boundaries slowly smeared but their smearing occurred very slow in comparison to their motion. The motion of the phase boundaries cannot be explained by the dependency of the diffusion coefficient on concentration, and could possibly be explained by the effect of barodiffusion. In addition, these solute/solvent boundaries were endowed with non-zero interfacial tension. This experimental study also revealed that the solvent penetration into the micromodel is diffusion-dominated for completely miscible binary mixtures. This is however non-Fickian diffusion with the dissolution rate dV/dt∼D^1/3t^-0.4 for almost the entire duration of the experiment (V is the volume occupied by the solvent, D is the diffusion coefficient and t is time). For the IBA/water mixture the experiments performed at undercritical temperatures revealed that the diffusive mass transport was negligible despite the mixture being out of its thermodynamic equilibrium. Despite a seeming simplicity of the experiments, to the author’s best knowledge, there is no theory that could correctly describe the observed diffusional penetration of a solvent into a solute-filled capillary tube and hence, into a more complex porous volume.

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Cooney, Anthony M. "Thermodynamic properties of binary liquid mixtures containing fluoroalcohols." Thesis, University of Leicester, 1988. http://hdl.handle.net/2381/34062.

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A detailed investigation into the thermodynamic properties of pure fluoroalcohols and binary mixtures containing fluoroalcohols is described. A batch calorimeter was used to measure excess enthalpies over the complete composition range and enthalpies of solution were obtained using an L.K.B. 8700 calorimeter. The excess volumes were determined using both batch and dilution dilatometers. Vapour-liquid equilibrium diagrams for binary mixtures have been determined from vapour pressure measurements using a static vapour pressure apparatus. Enthalpies of vaporisation of the fluoroalcohols were determined from the variation of the vapour pressure with temperature. Solid-liquid equilibrium phase diagrams have been determined using a simple freezing point cell, and liquid-liquid measurements obtained using a synthetic method. A new isothermal dilution calorimeter is also described. Unlike the batch calorimeter it allows a wide composition range to be studied from a single loading. The results for the test systems benzene + cyclo- hexane and benzene + tetrachloromethane obtained with this calorimeter are presented. The results obtained are in excellent agreement with those obtained by other workers.

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Mercer-Chalmers, June Dawn. "The thermodynamics of solutions and binary liquid mixtures." Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1005055.

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The thesis is presented in two parts. In part one, the excess thermodynamic properties have been determined for several binary liquid mixtures, with the aim of testing theories of liquid mixtures. The excess molar enthalpies, Hem, have been determined using an LKB flow microcalorimeter, and the excess molar volumes, Vem, have been determined using an Anton Paar densitometer. The HemS and VemS have been measured at 298.15 K for binary systems involving an alkanol (methanol, ethanol, I-propanol, 2-propanol) mixed with a hydrocarbon (l-hexene, I-heptene, l-octene, I-hexyne, I-heptyne, l-octyne, toluene, mesitylene, 0-, m-, or p-xylene, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclodecane). The results show trends relating to the degree of unsaturation, or size, of component molecules as well as the position of the hydroxyl group on the alkanol. Measurements were also made on mixtures involving an (n-alkane + a pseudo-n-alkane) and ( a cYcloalkane + a pseudo-cycloalkane). Two theories of liquid mixtures were tested in this work. The first theory tested was the theory of Congruency. This theory was tested, by means of a null test, on a novel set of mixtures involving an n-alkane (hexane, heptane, octane, decane, dodecane) + a pseudo-nalkane,and mixtures of a cycloalkane (cyclopentane, cyclohexane, cycloheptane, cyclooctane)+ a pseudo-cycloalkane. Deviations from the theory was less than the experimental error for the (n-alkane + pseudo-n-alkane) mixtures. However, significant deviations were observed for the mixtures of (a cycloalkane + a pseudo-cycloalkane). The second theory tested was the Flory theory, which has been used to predict the excess molar enthalpies and excess molar volumes for the mixtures involving (a 1-alkene, or 1-alkyne, or methyl-substituted benzene) + an alkanol. The results show that the theory does not hold for hydrocarbon mixtures involving an alkanol. In the second part of this thesis, the partial molar volumes, at infinite dilution, of binary solution involving a solid solute (18-crown-6 ether, dibenzo-18-crown-6 ether, dicyclohexanov 18-crown-6 ether, 15-crown-5 ether, or cryptand-222) are determined in various solvents. The results were repeated with a view to determine the volume changes at infinite dilution upon complexation, ΔV∞ of the crown ether or cryptand with a metal halide salt, MX (NaCl, NaI, KCl, KI, CsCl, CsI). The ΔV∞ results were compared with results in the literature for cryptand-222 (c-222) and dibenzo-18-crown-6 ether (B₂CE6) complexed with MX, and the study was extended to include further MX complexes with c-222 and B₂CE6, as well as MX complexes with 15-crown-5 ether and dicyclohexano-18-crown-6 ether. ΔV∞ results were correlated with the Hepler prediction of the electrostriction solvent effect.

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Books on the topic "Diffusion, binary liquid mixtures"

1

Lechner, M. D., ed. Pure Organometallic and Organononmetallic Liquids, Binary Liquid Mixtures. Berlin/Heidelberg: Springer-Verlag, 2001. http://dx.doi.org/10.1007/b68239.

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2

Berezhnoi, A. N. Binary diffusion coefficients of liquid vapors in gases. New York: Begell House, 1997.

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Bowles, R. J. Density profiles and concentration fluctuations in liquid binary mixtures. Norwich: University of East Anglia, 1986.

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Wohlfarth, Christian. Viscosity of Pure Organic Liquids and Binary Liquid Mixtures. Edited by M. D. Lechner. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49218-5.

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Lechner, M. D., ed. Surface Tension of Pure Liquids and Binary Liquid Mixtures. Berlin/Heidelberg: Springer-Verlag, 1997. http://dx.doi.org/10.1007/b60566.

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Wohlfarth, Christian. Surface Tension of Pure Liquids and Binary Liquid Mixtures. Edited by M. D. Lechner. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-48336-7.

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Madelung, O., ed. Static Dielectric Constants of Pure Liquids and Binary Liquid Mixtures. Berlin/Heidelberg: Springer-Verlag, 1991. http://dx.doi.org/10.1007/b44266.

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Wohlfarth, Christian. Static Dielectric Constants of Pure Liquids and Binary Liquid Mixtures. Edited by M. D. Lechner. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48168-4.

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9

Rainwater, James C. Vapor-liquid equilibrium of binary mixtures in the extended critical region. Washington: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.

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Rainwater, James C. Vapor-liquid equilibrium of binary mixtures in the extended critical region. Washington: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.

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Book chapters on the topic "Diffusion, binary liquid mixtures"

1

Duursma, Gail, Khellil Sefiane, and Joy Clarke. "Diffusion-Evaporation Studies of Binary Mixtures in Capillary Tubes." In Diffusion in Solids and Liquids III, 577–82. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-51-5.577.

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Cibulka, I., J. C. Fontaine, K. Sosnkowska-Kehiaian, and H. V. Kehiaian. "Index of Mixtures." In Binary Liquid Systems of Nonelectrolytes I, 4–111. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-02935-6_2.

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Shenai, V. M., B. L. Hamilton, and M. A. Matthews. "Diffusion in Liquid and Supercritical Fluid Mixtures." In ACS Symposium Series, 92–103. Washington, DC: American Chemical Society, 1992. http://dx.doi.org/10.1021/bk-1992-0514.ch008.

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Blankschtein, Daniel. "Statistical Mechanical Treatment of Binary Liquid Mixtures." In Lectures in Classical Thermodynamics with an Introduction to Statistical Mechanics, 523–29. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49198-7_49.

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Cibulka, I., J. C. Fontaine, K. Sosnkowska-Kehiaian, and H. V. Kehiaian. "Index of Mixtures in Subvol. IV/26B." In Binary Liquid Systems of Nonelectrolytes II, 2–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-23277-0_2.

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Cibulka, I., J. C. Fontaine, K. Sosnkowska-Kehiaian, and H. V. Kehiaian. "Index of Mixtures in Subvol. IV/26C." In Binary Liquid Systems of Nonelectrolytes III, 3–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-22852-0_2.

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Imre, Attila R. "Liquid-Liquid Phase Equilibria in Binary Mixtures Under Negative Pressure." In Liquids Under Negative Pressure, 81–94. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0498-5_8.

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Patil, A. G., Aruna P. Maharolkar, and A. Murugkar. "Study of Ultrasonic Properties of Binary Liquid Mixtures." In Techno-Societal 2018, 991–97. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16848-3_91.

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Hafskjold, Bjørn. "Computer Simulations of Thermal Diffusion in Binary Fluid Mixtures." In Thermal Nonequilibrium Phenomena in Fluid Mixtures, 3–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45791-7_1.

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Cabrera, Humberto. "Experimental Investigation of Thermal Diffusion in Binary Fluid Mixtures." In Computational and Experimental Fluid Mechanics with Applications to Physics, Engineering and the Environment, 259–70. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-00191-3_13.

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Conference papers on the topic "Diffusion, binary liquid mixtures"

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Chaves, Humberto, and Sebastian Donath. "Binary cavitation in a transparent three hole GDI nozzle." In ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems. Valencia: Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/ilass2017.2017.5051.

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A more or less real size three hole (0.1 mm diameter) transparent injection nozzle was made with 120° betweenthe orifices and an inclination of 20° to the injector axis. The geometry is similar to that of a multi hole GDI injector. Experiments are performed using n-pentane and α-methyl-naphtalene mixtures in varying composition. The flow in the orifices is observed under submerged injection conditions from downstream looking in direction of the injector using a beam splitter plate for illumination with the light from a Minilite NdYag laser that was made incoherent by fluorescence in a cuvette filled with a dilute rhodamine-ethanol mixture. The images show the appearance of cavitation depending on the cavitation number as well as on the composition of the mixture. The behaviour is not what can be expected from equilibrium thermodynamics. Due to the transient nature of the flow the n-pentane concentration cannot attain the equilibrium value one would expect and cavitation occurs at highercavitation values. Diffusion appears to play a role in the onset appearance of cavitation for binary mixtures.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.5051

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Obuladinne, Sai Sujith, and Huseyin Bostanci. "Two-Phase Spray Cooling With Water/2-Propanol Binary Mixture: Investigation of Mass Diffusion Resistance." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67514.

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Two-phase spray cooling has been an emerging thermal management technique offering high heat transfer coefficients (HTCs) and critical heat flux (CHF) levels, near-uniform surface temperatures, and efficient coolant usage that enables to design of compact and lightweight systems. Due to these capabilities, spray cooling is a promising approach for high heat flux applications in computing, power electronics, and optics. The two-phase spray cooling inherently depends on saturation temperature-pressure relationships of the working fluid to take advantage of high heat transfer rates associated with liquid-vapor phase change. When a certain application requires strict temperature and/or pressure conditions, thermophysical properties of the working fluid play a critical role in attaining proper efficiency, reliability, or packaging structure. However, some of the commonly used working fluids today, including refrigerants and dielectric liquids, have relatively poor properties and heat transfer performance. In such cases, utilizing binary mixtures to tune working fluid properties becomes an alternative approach. This study aimed to conduct an initial investigation on the spray cooling characteristics of practically important binary mixtures and demonstrate their capability for challenging high heat flux applications. The working fluid, water/2-propanol binary mixture at various concentration levels, specifically at x1 (liquid mass fraction of 2-proponal in water) of 0.0 (pure water), 0.25, 0.50, 0.879 (azeotropic mixture) and 1.0, represented both non-azeotropic and azeotropic cases. Tests were performed on a closed loop spray cooling system using a pressure atomized spray nozzle with a constant liquid flow rate at corresponding 20°C subcooling conditions and 1 Atm pressure. A copper test section measuring 10 mm × 10 mm × 2 mm with a plain, smooth surface simulated high heat flux source. Experimental procedure involved controlling the heat flux in increasing steps, and recording the steady-state temperatures to obtain cooling curves in the form of surface superheat vs heat flux. The obtained results showed that pure water (x1 = 0.0) and 2-propanol (x1 = 1.0) provide the highest and lowest heat transfer performance, respectively. At a given heat flux level, the HTC values indicated strong dependence on x1, where the HTCs depress proportional to the concentration difference between the liquid and vapor phases. The CHF values sharply decreased at x1≥ 0.25.

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Jaber, T. J., H. Bataller, and M. Z. Saghir. "Measurement of Thermodiffusion Coefficient for Binary Hydrocarbon Fluid Mixtures in Porous Medium: Experimental and Numerical Results." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10110.

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There has been a discussion that the thermodiffusion in porous medium is not identical to thermodiffusion in clear liquid. To validate this finding, a new thermodiffusion cell has been designed to measure thermal and molecular diffusion coefficients of binary mixture in porous medium under high pressure. A porous layer located between two liquid layers that cross two laser beams, is used. The difference of refractive index is obtained from the analysis of the interferograms recorded with a CCD camera. From the kinetics, the values of molecular and thermal diffusion coefficients through the porous medium were determined. The two binary systems dodecane (C12) and isobutylbenzene (IBB), and dodecane (C12) and tetrahydronaphthalene (THN) are used to validate the experimental setup at atmospheric pressure. Experimental results reveal an excellent agreement with benchmark values and a good agreement with theoretical data.

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Groll, Rodion. "Mathematical Modeling of Binary Nano Scale Diffusion of Molecular Gas Suspensions in Liquid Media." In ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2007. http://dx.doi.org/10.1115/icnmm2007-30092.

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A model describing the suspension diffusion process of gas molecules in liquid media is presented in this paper. This process is not yet solved by a satisfactory model for micro-scale applications at this time. The new model allows the simulation of diffusion processes in continuous media considering the molecular mass flux in a suspension/carrier phase mixture. Modelling the diffusion of gas suspensions in liquid media the saturation mass ratio is reached near the liquid/gas surface very quickly. The increase of gas concentration in the liquid domain depends on the elapsed time and the physical properties of gas and liquid media. The molecular gas velocity is described by a Maxwell probability density function. Based on this spectral method macroscopic physical values are modelled to describe time-dependent global concentration changes. Modelling the gas species diffusion the molecular convection is considered. Modelling the mass flux of the molecular gas suspension characteristic time scales are developed describing the completion level of the saturation progress based on non-dimensional formulations of the molecular convection equation. The present model is implemented in a CFD code and validated by a family of parametric simulation results depending on the saturation mass ratio of the suspended gas phase. This simulation result array shows the dependency of saturation time and saturation mass ratio of the suspended gas molecules. Based on this relation macroscopic diffusion processes in micromixers and microchannels are described with this model and without an extra solution of molecule trajectories or spectral fields of molecule velocity.

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Cai, Chang, Hong Liu, Xi Xi, Ming Jia, Weilong Zhang, and Yang He. "Theoretical Model of Bubble Growth in Superheated Ethanol-Water Mixture." In ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/mnhmt2019-3985.

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Abstract A novel model was developed to investigate the bubble growth characteristics in uniformly superheated ethanol-water (EtOH-H2O) mixture. The influence of the mass fraction of ethanol was discussed in detail. In the proposed model, the energy equation and the component diffusion equation for the liquid were respectively coupled with quadratic temperature and mass fraction distribution within the thermal and concentration boundary layers. The non-random two-liquid equation (NRTL) was adopted to obtain the vapor-liquid equilibrium of the binary mixture at the bubble surface. The comparison between the current calculated bubble radius with the available experimental data demonstrates the accuracy of the bubble growth model. The maximum mass diffusion limited growth rate was also proposed to quantify and illustrate the effect of mass diffusion on bubble growth. The results showed that the later stage of bubble growth in a binary mixture is controlled by both mass diffusion and heat transfer. The bubble growth characteristics strongly depend on the initial mass fraction of ethanol. Within a large concentration range, a higher content of ethanol is adverse to bubble growth at a constant superheat degree. The effect of mass diffusion on bubble growth becomes weaker with an increased initial mass fraction of ethanol.

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Garvey, Julie, David Newport, and Tara Dalton. "Liquid Diffusion Measurement in Micro/Mini Channels From Full-Field Digital Phase Measurement Interferometry (PMI)." In ASME 2004 2nd International Conference on Microchannels and Minichannels. ASMEDC, 2004. http://dx.doi.org/10.1115/icmm2004-2365.

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This paper considers division of amplitude interferometry as a means to extract fluid information from micro-systems. Initially the phase measurement technique is analysed and the measurement limitations of mixing measurement are assessed. Accurate phase measurements are then made of the concentration in a 3 dimensional channel flow. A mini sized channel with tow fluid flows at Reynolds numbers of 0.848 and 0.0848 is numerically analysed. The same channel is experimentally tested and the results for the mixing concentration gradients in channel flow are compared with those obtained numerically. The requirement for experimental measurement for accurate measurement of binary liquid diffusion is observed by the variation between experimental and numerical results. The diffusion coefficient measurement verifies PMI as a means of mixture measurement, or more broadly as a phase measurement technique for small-scale, or micro scale, fluidic analysis. PMI’s potential is finally discussed as a measurement technique for concentration, and hence fluidic analysis of micro channel mixing.

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7

Nasr Isfahani, Rasool, and Saeed Moghaddam. "Physics of Membrane-Based Phase Separation in Flow Boiling of a Binary Mixture." In ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icnmm2013-73076.

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This study investigates the physics of water desorption from a lithium bromide (LiBr) solution film. The study was conducted on a membrane-based desorber in which the solution flows through an array of microchannels capped by a porous membrane. The membrane allows the vapor to exit the flow and retains the liquid. The solution film velocity and thickness as well as the solution and vapor pressures are independently controlled. Effects of different parameters such as wall temperature, solution and vapor pressures, solution flow velocity, and the solution inlet temperature on desorption rate were studied. Two different mechanisms of desorption are observed and analyzed. These mechanisms consisted of: (1) direct diffusion of water molecules out of the solution and their subsequent flow through the membrane and (2) formation of water vapor bubbles within the solution and their exit through the membrane. Direct diffusion was the dominant desorption mode at low surface temperatures and its magnitude was directly related to the vapor pressure, the solution concentration, and the heated wall temperature. Desorption at the boiling regime was predominantly controlled by the solution flow pressure. Overall, an order of magnitude higher desorption rate compare to a previous study on a membrane-based desorber was achieved.

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Ohara, Junichi, and Shigeru Koyama. "Falling Film Evaporation of Binary Refrigerant Mixture in Vertical Rectangular Minichannels Consisting of Serrated-Fins." In ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icnmm2014-22184.

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The characteristics of heat transfer are investigated experimentally for the vertical falling film evaporation of binary refrigerant mixture HFC134a/HCFC123 in a rectangular minichannels consisting of offset strip fins. The refrigerant liquid is uniformly supplied to the channel through a distributor. The liquid flowing down vertically is heated electrically from the rear wall of the channel and evaporated. To observe the flow patterns during the evaporation process directly, the small circular window is set at the center of every section on the front wall. The experimental parameters are as follows: the mass velocity G = 28∼70 kg/(m2s), the heat flux q = 30∼50 kW/m2 and the pressure P ≈ 100∼260 kPa. In the case of large mass velocity G ≥ 55 kg/(m2s), the value of heat transfer coefficient becomes lower with increase of mass fraction of low-boiling component HFC134a wb in the region of x ≥ 0.3. The main reason for this inclination of α is considered that shearing force acts on the liquid-vapor interface becomes smaller because of vapor velocity suppressed by higher pressure in the test evaporator in the case of larger mass fraction of low-boiling component. Additionally, mass diffusion resistances formed on each side of vapor and liquid phase along the liquid-vapor interface are considered as a possible cause of reduction in the heat transfer coefficient α with increase of mass fraction wb. In the region of x ≥ 0.8, α descend rapidly despite the difference in the value of wb. It can be attributed to dry-out state of heat transfer area. Heat transfer coefficient derived from experiments is compared with that calculated from empirical correlation equation for heat transfer coefficient of pure refrigerant in a vertical falling film plate-fin evaporator.

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Tian, YanQing, Yingying Zhao, Xinyi Tang, and Xinmin Huang. "Series of binary mixtures." In Liquid Crystals, edited by Marzena Tykarska, Roman S. Dabrowski, and Jerzy Zielinski. SPIE, 1998. http://dx.doi.org/10.1117/12.301298.

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Abianeh, Omid Samimi, and C. P. Chen. "A Turbulence Model of Bi-Component Fuel Droplet for Atomizing Sprays." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-10038.

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A new approach to account for simultaneously finite thermal conductivity, finite mass diffusivity and turbulence effects within atomizing liquid sprays is presented in this paper. The main contribution of this paper is to incorporate the liquid turbulence effect in modeling the multi-component droplet liquid jet evaporation. For this study, we consider a binary mixture of heptane and decane liquid fuel injected into a hot gas environment. The finite conductivity model is based on a newly developed two-temperature two-layer film theory of Chen et al. [1], where the turbulence characteristics of the droplet are used to estimate the effective thermal conductivity. Fuel droplets inherit turbulence from high Reynolds number issuing liquid injector flows. The present paper extends the formulation of Chen et al. [1] to estimate effective mass transfer diffusivity within the drop. In this model four regions are considered, interior and the surface of the droplet, the liquid gas interface and the surrounding gas phase. An approximate solution to the quasi-steady energy equation was used to derive an explicit expression for the heat flux from the surrounding gas to the droplet–gas interface, with inter-diffusion of fuel vapor and the surrounding gas taken into account. The thermo-transport properties including their dependence on temperature are considered. Validation studies were carried out by comparison with the experimental results.

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Reports on the topic "Diffusion, binary liquid mixtures"

1

Schnitzler, J. v., and J. M. Prausnitz. A classical model for closed-loop diagrams of binary liquid mixtures. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10146719.

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2

Rainwater, James C. Vapor-liquid equilibrium of binary mixtures in the extended critical region :. Gaithersburg, MD: National Bureau of Standards, 1989. http://dx.doi.org/10.6028/nist.tn.1328.

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3

Beretta, Gian Paolo, and Pietro Poesio. Microscale Heat Transfer Enhancement using Spinodal Decomposition of Binary Liquid Mixtures: A Collaborative Modeling/Experimental Approach. Fort Belvoir, VA: Defense Technical Information Center, September 2013. http://dx.doi.org/10.21236/ada593123.

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4

Webb, S. W. Gas-phase diffusion in porous media: Evaluation of an advective- dispersive formulation and the dusty-gas model including comparison to data for binary mixtures. Office of Scientific and Technical Information (OSTI), May 1996. http://dx.doi.org/10.2172/242787.

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