AMIROUDINE, Sakirhoussein; DEMEKHIN, E. A.; GANCHENKO, G. S.; SHELISTOV, V. S.; FRANTS, E. A.

doi:10.1063/5.0098652

Institut de Mécanique et d'Ingénierie [I2M]

DEMEKHIN, E. A.

GANCHENKO, G. S.

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Physics of Fluids. 2022-08, vol. 34, n° 8, p. 084103

Resumen en inglés

The objective in the present work is to consider a simple example of instability of a conducting self-similar micro jet in the external electric field, which represents a prototype of some microfluidic instabilities. Salt from a point source is emitted into its own aquatic solution, which is subject to an external uniform velocity field together with an electrostatic field, and is convected downstream and diffused. The flow is considered in microscales so that, in contrast to the classical jets, the Reynolds numbers are practically zero, but the Péclet numbers are large. The parameters are found at which such a microjet is unstable. Along with the linear stability analysis, we have fulfilled the numerical simulations of the full nonlinear system of equations. The numerical simulation qualitatively confirmed the results of the linear stability and showed that this instability visually reminds classical instabilities of free jets and wakes.< Leer menos

Palabras clave en inglés

Computational fluid dynamics

Electrolytes

Signal processing

Electrostatics

Linear stability analysis

Fluid mechanics

Navier Stokes equations

Computer simulation

Nonlinear systems

Electrical conductivity

URI

https://oskar-bordeaux.fr/handle/20.500.12278/142261

DOI

http://dx.doi.org/10.1063/5.0098652

Centros de investigación

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295

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Instability of a salt jet emitted from a point source in an external electric field

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Resumen en inglés

Palabras clave en inglés

URI

DOI

Centros de investigación