Hybrid numerical method for interfacial flow with soluble surfactant and its application to an experiment in microfluidic tip streaming

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This chapter describes a hybrid numerical method for solving problems of two-phase flow with soluble surfactant in the limit of large bulk Peclet number. Most numerical studies of the effect of surfactant on the deformation and breakup of a single bubble or drop in an imposed flow are for insoluble surfactant, that is, for surfactant that is confined to the interface alone. A soluble surfactant advects and diffuses in the bulk fluid as a passive scalar, but when local interfacial surface area is changed during deformation, the surface and bulk surfactant concentrations are brought out of equilibrium. This causes an exchange or transfer of surfactant between its dissolved form in the bulk and its adsorbed form on the interface that acts so as to restore equilibrium between the two surfactant phases.

Original languageEnglish (US)
Title of host publicationComputational Methods for Complex Liquid-Fluid Interfaces
PublisherCRC Press
Pages309-330
Number of pages22
ISBN (Electronic)9781498722094
ISBN (Print)9781498722087
DOIs
StatePublished - Jan 1 2015

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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