Determination of the molecular diffusion coefficients in ternary mixtures by the sliding symmetric tubes technique

Larrañaga, Miren Etxeberria; Rees, D. Andrew S.; Bou-Ali, M. Mounir

doi:10.1063/1.4864189

Cited by 26 publications

(14 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most methods that are applicable to ternary mixtures, e.g. the Rayleigh [4] and Gouy [5] interferometric approaches, the Taylor dispersion technique [6][7][8], sliding symmetric tubes [9] or digital interferometry in the counter flow cell [10], are based on the optical properties of liquids [11], where a key role is played by the variation of the refractive index with concentration . Ternary mixtures can be processed relatively easily when the two contrast factors / , where = 1, 2, have similar orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Do ternary liquid mixtures exhibit negative main Fick diffusion coefficients?

Kozlova

Mialdun

Ryzhkov

et al. 2019

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Do ternary liquid mixtures exhibit negative main Fick diffusion coefficients?

Kozlova

Mialdun

Ryzhkov

et al. 2019

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…In addition to this, data processing is also more complex and often results in large uncertainties. [18][19][20] In addition to industrial applications, reliable experimental data on ternary diffusion are needed for elucidating some fundamental questions still under discussion, like the relation between the eigenvalues of the diffusion matrix and the quasibinary diffusion coefficient 21 or the sign of the main diffusion coefficients D 11 and D 22 . [18][19][20] In addition to industrial applications, reliable experimental data on ternary diffusion are needed for elucidating some fundamental questions still under discussion, like the relation between the eigenvalues of the diffusion matrix and the quasibinary diffusion coefficient 21 or the sign of the main diffusion coefficients D 11 and D 22 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of Fickian diffusion in the ternary mixtures of water–ethanol–triethylene glycol and its binary pairs

Legros

Gaponenko

Mialdun

et al. 2015

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

We present a comprehensive experimental study of isothermal Fickian diffusion in the ternary and binary liquid mixtures of water, ethanol, and triethylene glycol over the entire ternary composition space. 21 ternary mixtures inside the composition triangle have been investigated by means of the Taylor dispersion technique and 30 binary mixtures by Taylor dispersion and/or optical beam deflection in a Soret cell. The scalar binary diffusion coefficient has been determined along all three binary boundaries of the composition space and compared with estimations based on the Stokes-Einstein relation using stick or slip boundary conditions. The four elements of the ternary diffusion matrix and the diffusion eigenvalues were determined over a large portion of the composition triangle. The pseudo-binary diffusion coefficients obtained in Taylor dispersion experiments with either one of the two independent concentrations kept constant are comparable to the two diffusion eigenvalues. One of the two off-diagonal elements of the diffusion matrix is of the same order as the diagonal ones and, hence, not negligible, whereas the other one is approximately one order of magnitude smaller. Where available, our results compare well with literature data. The investigated compositions also comprise the five compositions that are scheduled for microgravity experiments in the ESA DCMIX3 project.

show abstract

“…The properties of the mixtures introduced into the device are summarised in Table 1 below. The mass flux in a multicomponent system was represented due to [32]:…”

Section: No-slip Boundary Conditionmentioning

confidence: 99%

Adaptive coatings based on polyaniline for direct 2D observation of diffusion processes in microfluidic systems

Florea

Martin‐Mayor

Bou-Ali

et al. 2016

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Microfluidic devices are poised to dramatically influence the future of the process industry.Therefore the understanding and proper evaluation of the flow and mixing behaviour at microscale becomes a very important issue. In this study, the diffusion behaviour of two reacting solutions of HCl and NaOH were directly observed in a glass/polydimethylsiloxane microfluidic device using adaptive coatings based on the conductive polymer polyaniline that are covalently attached to the microchannel walls. The two liquid streams were combined at the junction of a Y-shaped microchannel, and allowed to diffuse into each other and react.The results showed excellent correlation between optical observation of the diffusion process and the numerical results. A numerical model which is based on finite volume method (FVM) discretisation of steady Navier-Stokes (fluid flow) equations and mass transport equations without reactions was used to calculate the flow variables at discrete points in the finite volume mesh element. The high correlation between theory and practical data indicates the potential of such coatings to monitor diffusion processes and mixing behaviour inside microfluidic channels in a dye free environment.

show abstract

Determination of the molecular diffusion coefficients in ternary mixtures by the sliding symmetric tubes technique

Cited by 26 publications

References 23 publications

Do ternary liquid mixtures exhibit negative main Fick diffusion coefficients?

Do ternary liquid mixtures exhibit negative main Fick diffusion coefficients?

Investigation of Fickian diffusion in the ternary mixtures of water–ethanol–triethylene glycol and its binary pairs

Adaptive coatings based on polyaniline for direct 2D observation of diffusion processes in microfluidic systems

Contact Info

Product

Resources

About