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Diffusive and convective mass transfer in two-phase flow in microchannels

Published

Author(s)

Steven D. Hudson, Jai A. Pathak, Jeffrey D. Martin

Abstract

  The kinetics of mass transfer from one phase to another is monitored in flow. The time-dependent interfacial tension between water and oil (determined from drop deformation dynamics in situ) serves as a measure of the butanol concentration within the drop. This concentration begins high and decreases, as the butanol diffuses into the surrounding oil. This diffusive process is effectively two dimensional, i.e. only transverse to the flow. The tension is determined in situ through analysis of the drop motion and shape. This method is advantageous because it is implemented in microchannel flow, where convective and complex-flow effects are present; drop size is also tunable.
Proceedings Title
15th International Congress on Rheology
Conference Dates
August 3-8, 2008
Conference Location
Monterey, CA

Keywords

Microfluidics, multiphase flow, surfactant mass transfer, interfacial tension

Citation

Hudson, S. , Pathak, J. and Martin, J. (2008), Diffusive and convective mass transfer in two-phase flow in microchannels, 15th International Congress on Rheology, Monterey, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=853625 (Accessed June 25, 2024)

Issues

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Created August 3, 2008, Updated February 19, 2017