title: Flow velocity profile of micro counter-current flows.
abstract: Flow velocity profiles of micro counter-current flow of aqueous and butylacetate phases in a microchannel having a width of 100 microm were measured by micro particle image velocimetry. In order to analyze the hydrodynamic characteristics of the counter-current flow, we derived a simple analytical model for the velocity profile. When flow rates of the aqueous and organic phases were 0.2 and 0.1 microl/min, the model agreed well with the experimental results. Predictions about the velocity profile will contribute to estimation of the extraction efficiency in the co-current and counter-current extraction process.
authors.affiliation: Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan.
authors.forename: Arata
authors.initials: A
authors.lastname: Aota
authors.forename: Akihide
authors.initials: A
authors.lastname: Hibara
authors.forename: Kyosuke
authors.initials: K
authors.lastname: Shinohara
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Sugii
authors.forename: Koji
authors.initials: K
authors.lastname: Okamoto
authors.forename: Takehiko
authors.initials: T
authors.lastname: Kitamori