Artículo
Novel swirl flow‑focusing microfluidic device for the production of monodisperse microbubbles
Autor/es | Arcos Turmo, Irene
Herrada Gutiérrez, Miguel Ángel López-Herrera Sánchez, José María Fernández Rivas, David Gañán-Calvo, Alfonso M. Castro Hernández, Elena De |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos |
Fecha de publicación | 2018-08 |
Fecha de depósito | 2022-07-05 |
Publicado en |
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Resumen | A novel swirl flow-focusing microfluidic axisymmetric device for the generation of monodisperse microbubbles at high production
rates to be used as in-line contrast agents for medical applications is presented. The swirl ... A novel swirl flow-focusing microfluidic axisymmetric device for the generation of monodisperse microbubbles at high production rates to be used as in-line contrast agents for medical applications is presented. The swirl effect is induced upstream of the discharge orifice by a circular array of microblades which form a given angle with the radial direction. The induced vortical component on the focusing liquid stabilizes the gas meniscus by the vorticity amplification due to vortex stretching as the liquid is forced through the discharge orifice. The stabilized meniscus tapers into a steady gas ligament that breaks into monodisperse microbubbles. A reduction up to 57% in the microbubble diameter is accomplished when compared to conventional axisymmetric flow-focusing microdevices. An exhaustive experimental study is performed for various blade angles and numerous gas to liquid flow rate ratios, validating previous VoF numerical simulations. The microbubbles issued from the stabilized menisci verify prior scaling law of flow-focusing. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España Junta de Andalucía |
Identificador del proyecto | DPI2013-46485-C3-1-R
P11-TEP-7465 |
Cita | Arcos Turmo, I., Herrada Gutiérrez, M.Á., López-Herrera Sánchez, J.M., Fernández Rivas, D., Gañán-Calvo, A.M. y Castro Hernández, E.D. (2018). Novel swirl flow‑focusing microfluidic device for the production of monodisperse microbubbles. Microfluidics and Nanofluidics, 22 (8), 79. |
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