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

Published

August 3, 2008

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

Pub Type

Conferences

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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 October 15, 2025)