Session PG: Drops VIII
11:35 AM–12:27 PM, Tuesday, November 25, 2008
Room: 101A
Chair: Alfonso M. Ganon-Calvo, University of Seville, Spain
Abstract ID: BAPS.2008.DFD.PG.2
Abstract: PG.00002 : Swirl Flow-Focusing: a new way for the generation of Microbubbles
11:48 AM–12:01 PM
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Abstract 
Authors:
Miguel A. Herrada
(ESI, Universidad de Sevilla)
Jose M. Lopez-Herrera
(ESI, Universidad de Sevilla)
Alfonso M. Ganan-Calvo
(ESI, Universidad de Sevilla)
A volume of fluid (VOF) numerical method is used to predict the dynamics of bubble formation in an axisymmetric flow-focusing microfluidic device. Our numerical results for several gas- liquid configurations show that in all cases analyzed, the introduction of co-axial swirl in the focusing liquid fosters the stabilization of the gas-liquid meniscus promoting tapered geometries. Consequently, the use of swirl leads to a dramatic reduction of the size of the bubbles generated by the flow focusing device. Preliminary experiments support our numerical findings.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.DFD.PG.2