LIF measurements of concentration profiles in the aqueous mass boundary layer

TitleLIF measurements of concentration profiles in the aqueous mass boundary layer
Publication TypeJournal Article
Year of Publication1998
AuthorsMünsterer, T, Jähne, B
JournalExp. Fluids
Volume25
Pagination190--196
Abstract

A laser-induced fluorescence (LIF) technique is described to measure vertical concentration profiles of gases in the aqueous mass boundary layer at a free water surface. The technique uses an acid-base reaction of the fluorescence indicator fluorescein at the water surface to visualize the concentration profiles. The technique is capable of measuring two-dimensional vertical concentration profiles at a rate of 200 frames/s and a spatial resolution of 16 um. The mass boundary layer at a free surface is characterized by significant fluctuations. Direct surface renewal is observed. The mean profiles also support rather surface renewal models than turbulent diffusion models.

DOI10.1007/s003480050223
Citation Keymuensterer1998