title: Optical Feedback Interferometry for Velocity Measurement of Parallel Liquid-Liquid Flows in a Microchannel.
abstract: Optical feedback interferometry (OFI) is a compact sensing technique with recent implementation for flow measurements in microchannels. We propose implementing OFI for the analysis at the microscale of multiphase flows starting with the case of parallel flows of two immiscible fluids. The velocity profiles in each phase were measured and the interface location estimated for several operating conditions. To the authors knowledge, this sensing technique is applied here for the first time to multiphase flows. Theoretical profiles issued from a model based on the Couette viscous flow approximation reproduce fairly well the experimental results. The sensing system and the analysis presented here provide a new tool for studying more complex interactions between immiscible fluids (such as liquid droplets flowing in a microchannel).
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, Toulouse F-31400, France. eramirez@inp-toulouse.fr.|Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Calle 30 No. 502, Miramar, La Habana 11300, Cuba. eramirez@inp-toulouse.fr.
authors.forename: Evelio E
authors.initials: EE
authors.lastname: Ramírez-Miquet
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, Toulouse F-31400, France. julien.perchoux@laas.fr.
authors.forename: Julien
authors.initials: J
authors.lastname: Perchoux
authors.affiliation: Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 4 allée Emile Monso, BP 84234, Toulouse F-31432, France. karine.loubiere@ensiacet.fr.
authors.forename: Karine
authors.initials: K
authors.lastname: Loubière
authors.affiliation: LAAS-CNRS, Université de Toulouse, CNRS, INP, Toulouse F-31400, France. clement.tronche@enseeiht.fr.
authors.forename: Clément
authors.initials: C
authors.lastname: Tronche
authors.affiliation: Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 4 allée Emile Monso, BP 84234, Toulouse F-31432, France. directeur@ensiacet.fr.
authors.forename: Laurent
authors.initials: L
authors.lastname: Prat
authors.affiliation: Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, Mexico. osotolongo@uaem.mx.|Cátedra de Sistemas Complejos Henri Poincaré, Universidad de La Habana, La Habana 10400, Cuba. osotolongo@uaem.mx.
authors.forename: Oscar
authors.initials: O
authors.lastname: Sotolongo-Costa
keywords: microfluidics; optical feedback interferometry; parallel two-phase flows; velocimetry