Numerical modeling of the development of small-scale magmatic emulsions by Korteweg stress driven flow

Valentini, Luca; Moore, Kathryn

doi:10.1016/j.jvolgeores.2008.10.004

Cited by 11 publications

(1 citation statement)

References 58 publications

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“…In this work, the Korteweg stress contribution at the mixing region 14 separating the two fluids is not accounted for due to similar viscosities and densities of the fluids used. The contribution of Korteweg stress term is proportional to the viscosity contrast of the two miscible fluids; hence advection arising from this term is negligible for low viscosity ratios [61]. (Fig.…”

Section: Numerical Simulation Of Two Phase Co-flowmentioning

confidence: 99%

Production of polymeric nanoparticles by micromixing in a co-flow microfluidic glass capillary device

Othman

Vladisavljević

Bandulasena

et al. 2015

Chemical Engineering Journal

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Section: Numerical Simulation Of Two Phase Co-flowmentioning

confidence: 99%

Production of polymeric nanoparticles by micromixing in a co-flow microfluidic glass capillary device

Othman

Vladisavljević

Bandulasena

et al. 2015

Chemical Engineering Journal

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Effect of Temperature Upon Double Diffusive Instability in Navier–Stokes–Voigt Models with Kazhikhov–Smagulov and Korteweg Terms

Straughan

2023

Appl Math Optim

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We present models for convection in a mixture of viscous fluids when the layer is heated from below and simultaneously the pointwise volume concentration of one of the fluids is heavier below. This configuration produces a problem of competitive double diffusion since heating from below promotes instability, but the greater density of fluid below is stabilizing. The fluids are of linear viscous type which may contain Kelvin–Voigt terms, but density gradients due to the mixture appear strongly in the governing equations. The density gradients give rise to Korteweg stresses, but may also be described by theory due to Kazhikhov and Smagulov. The systems of equations which appear are thus highly nonlinear. The instability surface threshold is calculated and this is found to have a complex nonlinear shape, very different from the linear ones found in classical thermohaline convection in a Navier–Stokes fluid. It is shown that the Kazhikhov–Smagulov terms, Korteweg terms and Kelvin–Voigt term play a key role in acting as stabilizing agents but the associated effect is very nonlinear. Quantitative values of the instability surface are displayed showing the effect Korteweg terms, Kazhikhov–Smagulov terms, and the Kelvin Voigt term have. The nonlinear stability problem is addressed by means of a generalized energy theory deriving different results depending on which underlying theory is employed.

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The apparently anomalous effects of surfactants on interfacial tension in the IBA/water system near its upper critical solution temperature

Lombardo¹,

Calabrese

Gelardi

et al. 2016

Colloid Polym Sci

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We studied the effect of anionic, cationic, and nonionic surfactants on the interfacial tension between the two phases of the isobutyric acid/water system using spinning drop tensiometry. It has been found that interfacial tension decreases with increasing concentration of the surfactant in the case of sodium dodecyl sulfate (SDS) and of dodecyltrimethylammonium chloride (DTAC). However, in the case of Triton X-100 an increase of surfactant concentration leads to an increase of the interfacial tension. Such results are consistent with the upper critical solution temperature (UCST) in the presence of these surfactants: the UCST decreases with increasing SDS and DTAC concentrations while it increases in the case of Triton X-100. This apparently anomalous effect has been explained by considering the molecular structure of Triton X-100, which possesses a short polymeric chain that promotes its partitioning toward one of the two phases making them less compatible and thus raises the UCST and the interfacial tension

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Numerical modeling of the development of small-scale magmatic emulsions by Korteweg stress driven flow

Cited by 11 publications

References 58 publications

Production of polymeric nanoparticles by micromixing in a co-flow microfluidic glass capillary device

Production of polymeric nanoparticles by micromixing in a co-flow microfluidic glass capillary device

Effect of Temperature Upon Double Diffusive Instability in Navier–Stokes–Voigt Models with Kazhikhov–Smagulov and Korteweg Terms

The apparently anomalous effects of surfactants on interfacial tension in the IBA/water system near its upper critical solution temperature

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