Écoulement de gouttes dans des microcanaux : simulations numériques et expériences
GALUSINSKI, Cedric
Institut de Mathématiques de Bordeaux [IMB]
Centre de Physique Théorique - UMR 6207 [CPT]
Centre de Physique Théorique - UMR 7332 [CPT]
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Institut de Mathématiques de Bordeaux [IMB]
Centre de Physique Théorique - UMR 6207 [CPT]
Centre de Physique Théorique - UMR 7332 [CPT]
GALUSINSKI, Cedric
Institut de Mathématiques de Bordeaux [IMB]
Centre de Physique Théorique - UMR 6207 [CPT]
Centre de Physique Théorique - UMR 7332 [CPT]
< Reduce
Institut de Mathématiques de Bordeaux [IMB]
Centre de Physique Théorique - UMR 6207 [CPT]
Centre de Physique Théorique - UMR 7332 [CPT]
Language
fr
Communication dans un congrès
This item was published in
CFM 2007 - 18ème Congrès Français de Mécanique, 2007-08-27, Grenoble. 2007-08-27p. CFM2007-1446
English Abstract
Over the last decade, microfluidics has revolutionized our ability to manipulate and control flows in channels the width of a single human hair. Due to preponderant effect of surface tension, flows of two immiscible fluids ...Read more >
Over the last decade, microfluidics has revolutionized our ability to manipulate and control flows in channels the width of a single human hair. Due to preponderant effect of surface tension, flows of two immiscible fluids in microdevices allow to create monodisperse emulsions where droplets are used as microreactors to study very fast chemical kinetics. In this paper, we present a new numerical method for immiscible incompressible bifluid flows in microfluidics. This Level Set approach allows fast and accurate simulations of droplets hydrodynamics in microchannels. We particularly focus on mixing dynamics inside microdroplets : numerical simulations are in good agreement with physical experiments. Zones, where fluid is trapped in front and at the back of the droplet, already observed experimentally, are brought to the fore numerically. In addition, we explore various mixing dynamics inside microdroplets by studying the influence of parameters such as droplet volume, injection velocity, viscosity ratio and confinement.Read less <
Keywords
microfluidique
level set
microgouttes
Origin
Hal imported