The influence of the entry region on the instability of a coflowing injector device

The occurrence of dripping and jetting regimes in a microfluidic coflowing injector device has been related recently to the spatio-temporal stability properties of the developed velocity profile. Dripping corresponds to an absolutely unstable flow while jetting is observed when the Rayleigh-Plateau...

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Published in:Journal of physics. Condensed matter 2018-07, Vol.30 (28), p.284003-284003
Main Authors: Augello, L, Fani, A, Gallaire, F
Format: Article
Language:English
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coflowing jet
dripping/jetting
Rayleigh-Plateau instability
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cited_by cdi_FETCH-LOGICAL-c425t-989c7a8bc9a43370ce9a7c741f8a9e4492df1db9820a6054adbf377e3d51cdb13
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creator Augello, L
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Gallaire, F
description The occurrence of dripping and jetting regimes in a microfluidic coflowing injector device has been related recently to the spatio-temporal stability properties of the developed velocity profile. Dripping corresponds to an absolutely unstable flow while jetting is observed when the Rayleigh-Plateau instability of the core-annular jet is convective. In this work we take into account the effect of the entry region on the dripping to jetting transition by carrying out a global stability analysis of the steady two-phase base flow. We show that, depending on the flow parameters, the entry region can affect significantly the transition between the two regimes.
doi_str_mv 10.1088/1361-648X/aac790
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subjects coflowing jet
dripping/jetting
Rayleigh-Plateau instability
title The influence of the entry region on the instability of a coflowing injector device
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