Oscillatory driven cavity with an air/water interface and an insoluble monolayer: Surface viscosity effects

Juan Lopez, Amir H. Hirsa

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Flow in a planar cavity bounded by stationary side walls, a fiat gas/liquid interface covered by an insoluble monolayer, and driven by sinusoidal motion of the floor is examined numerically. Navier-Stokes computations with the Boussinesq-Scriven surface model are presented utilizing the equation-of-state measured for a vitamin K1 monolayer on the air/water interface. The results identify a range of initial surfactant concentration for which the surface velocity is sensitive to the surface viscosity B (sum of surface shear and dilatational viscosities) down to 10-2 surface Poise. Thus, the study suggests a practical method for determining surface viscosities consisting of the measurement of the motion of a tracer particle on the interface and comparisons with numerical computations at various values of B.

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalJournal of Colloid And Interface Science
Volume242
Issue number1
DOIs
StatePublished - Oct 1 2001

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Keywords

  • Insoluble surfactants
  • Nonlinear equation-of-state
  • Surface dilatational viscosity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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