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Article Dans Une Revue Soft Matter Année : 2015

Cooperative breakups induced by drop-to-drop interactions in one-dimensional flows of drops against micro-obstacles

Louis Salkin
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Laurent Courbin
Pascal Panizza

Résumé

Depending on the capillary number at play and the parameters of the flow geometry, a drop may or may not break when colliding with an obstacle in a microdevice. Modeling the flow of one-dimensional trains of monodisperse drops impacting a micro-obstacle, we show numerically that complex dynamics may arise through drop-to-drop hydrodynamic interactions: we observe sequences of breakup events in which the size of the daughter drops created upon breaking mother ones becomes a periodic function of time. We demonstrate the existence of numerous bifurcations between periodic breakup regimes and we establish diagrams mapping the possible breakup dynamics as a function of the governing (physicochemical, hydrodynamic, and geometric) parameters. Microfluidic experiments validate our model as they concur very well with predictions.
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Dates et versions

hal-01131255 , version 1 (13-03-2015)

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Citer

Alexandre Schmit, Louis Salkin, Laurent Courbin, Pascal Panizza. Cooperative breakups induced by drop-to-drop interactions in one-dimensional flows of drops against micro-obstacles. Soft Matter, 2015, 11 (12), pp.2454-2460. ⟨10.1039/C4SM02036G⟩. ⟨hal-01131255⟩
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