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oai:recercat.cat:2445/1737202026-04-15T19:10:17Zcom_2072_1057col_2072_478812col_2072_478822col_2072_478917

Controlling shapes in a coaxial focusing microfluidic device: experiments and theory Rodríguez Trujillo, Romén Kim-Im, Yu-Han Hernández Machado, Aurora Dinàmica de fluids Interfícies (Ciències físiques) Models matemàtics Experiments Fluid dynamics Interfaces (Physical sciences) Mathematical models Experiments A coaxial flow focusing PDMS (polydimethylsiloxane) microfluidic device has been designed and manufactured by soft lithography in order to experimentally study a miscible inner flow. We studied a coaxially focused inner flow (formed by an aqueous fluorescein solution) which was fully isolated from all microchannel surfaces by an additional water outer flow. Different flow rates were used to produce a variety of flow ratios and a 3D reconstruction of the cross-section was performed using confocal microscope images. The results showed an elliptical section of the coaxially focused inner flow that changes in shape depending on the flow rate ratio applied. We have also developed a mathematical model that allows us to predict and control the geometry of the coaxially focused inner flow. 2021-02-08T12:15:01Z 2021-02-08T12:15:01Z 2020-01-13 2021-02-08T12:15:01Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.3390/mi11010085 Micromachines, 2020, vol. 11, num. 85 https://doi.org/10.3390/mi11010085 cc-by (c) Rodriguez Trujillo, Romen et al., 2020 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess MDPI Articles publicats en revistes (Física de la Matèria Condensada)