Flow regime transitions and effects on solute transport in surfactant-driven Marangoni flows.

ABSTRACT:

Hypothesis

Surfactant-driven Marangoni flow on liquid films is predicted to depend on subphase depth and initial surface tension difference between the subphase and deposited surfactant solution drop. Changes in flow behavior will impact transport of soluble species entrained in the Marangoni flow along the surface. In extreme cases, the subphase film may rupture, limiting transport. Understanding this behavior is important for applications in drug delivery, coatings, and oil spill remediation.

Experiments

A trans-illumination optical technique measured the subphase height profiles and drop content transport after drop deposition when varying initial subphase depth, surfactant concentration, and subphase viscosity.

Findings

Three distinct flow regimes were identified

SUBMITTER: Iasella SV 

PROVIDER: S-EPMC6711821 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature