Studies on mixing. XV. Effect of directing of flow on the homogenisation of miscible liquids by rotary mixers

Removing the continuous phase of a Pickering emulsion of partially miscible liquids by selective evaporation provides a one-step route to assembling colloidal particles into a cellular network.

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Mixing of miscible liquids with density differences: Effect of volume and density of the tracer fluid

The Canadian Journal of Chemical Engineering ◽

10.1002/cjce.5450770528 ◽

1999 ◽

Vol 77 (5) ◽

pp. 988-996 ◽

Cited By ~ 11

Author(s):

Parag R. Gogate ◽

Aniruddha B. Pandit

Keyword(s):

Miscible Liquids

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Viscous Fingering of Miscible Liquids in Porous and Swellable Media for Rapid Diagnostic Tests

Bioengineering ◽

10.3390/bioengineering5040094 ◽

2018 ◽

Vol 5 (4) ◽

pp. 94

Author(s):

Holly Clingan ◽

Devon Rusk ◽

Kathryn Smith ◽

Antonio Garcia

Keyword(s):

Saliva Sample ◽

Fluid Motion ◽

Test Strip ◽

Viscous Fingering ◽

Test Method ◽

Colorimetric Test ◽

Significant Movement ◽

Miscible Liquids ◽

Korteweg Stresses ◽

Kinetics Of

In lateral flow and colorimetric test strip diagnostics, the effects of capillary action and diffusion on speed and sensitivity have been well studied. However, another form of fluid motion can be generated due to stresses and instabilities generated in pores when two miscible liquids with different densities and viscosities come into contact. This study explored how a swellable test pad can be deployed for measuring urea in saliva by partially prefilling the pad with a miscible solution of greater viscosity and density. The resultant Korteweg stresses and viscous fingering patterns were analyzed using solutions with added food color through video analysis and image processing. Image analysis was simplified using the saturation channel after converting RGB image sequences to HSB. The kinetics of liquid mixing agreed with capillary displacement results for miscible liquids undergoing movement from Korteweg stresses. After capillary filling, there was significant movement of liquid due to these fluidic effects, which led to mixing of the saliva sample with an enzyme test solution. Owing to the simplicity and speed of this test method, urea can be analyzed with an electronic nose over a useful range for detecting salivary urea concentration for rapid and early detection of dehydration.

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Co-flowing of partially miscible liquids for the generation of monodisperse microparticles

Advanced Powder Technology ◽

10.1016/j.apt.2017.08.015 ◽

2017 ◽

Vol 28 (11) ◽

pp. 2886-2892

Author(s):

Lipeng Zhang ◽

Andrew Parison ◽

Yinghe He

Keyword(s):

Partially Miscible ◽

Miscible Liquids

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Mixing generated by Faraday instability between miscible liquids

Physical Review E ◽

10.1103/physreve.85.016326 ◽

2012 ◽

Vol 85 (1) ◽

Cited By ~ 7

Author(s):

Sakir Amiroudine ◽

Farzam Zoueshtiagh ◽

Ranga Narayanan

Keyword(s):

Faraday Instability ◽

Miscible Liquids

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Sharp transition between coalescence and non-coalescence of sessile drops

Journal of Fluid Mechanics ◽

10.1017/jfm.2014.73 ◽

2014 ◽

Vol 743 ◽

Cited By ~ 13

Author(s):

Stefan Karpitschka ◽

Hans Riegler

Keyword(s):

Contact Region ◽

Threshold Value ◽

System Control ◽

Arithmetic Means ◽

Liquid Body ◽

Molecular Diffusivity ◽

Experimental Resolution ◽

Miscible Liquids ◽

Phase Angles ◽

Sessile Drops

AbstractUnexpectedly, under certain conditions, sessile drops from different but completely miscible liquids do not always coalesce instantaneously upon contact: the drop bodies remain separated in a temporary state of non-coalescence, connected through a thin liquid bridge. Here we investigate the transition between the states of instantaneous coalescence and temporary non-coalescence. Experiments reveal that it is barely influenced by viscosities and absolute surface tensions. The main system control parameters for the transition are the arithmetic means of the three-phase angles, $\overline{\Theta }_{a}$, and the surface tension differences $\Delta \gamma $ between the two liquids. These relevant parameters can be combined into a single system parameter, a specific Marangoni number $\widetilde{M}=3\Delta \gamma /(2\overline{\gamma }\overline{\Theta }_{a}^2)$. This $\widetilde{M}$ universally characterizes the coalescence transition behaviour as a function of both the physicochemical liquid properties and the shape of the liquid body in the contact region. The transition occurs at a certain threshold value $\widetilde{M}_t$ and is sharp within the experimental resolution. The experimentally observed threshold value of $\widetilde{M}_t\approx 2$ agrees quantitatively with values obtained by simulations assuming realistic material parameters. The simulations indicate that the absolute value of $\widetilde{M}_t$ very weakly depends on the molecular diffusivity.

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