Author(s): John Crimaldi; Jeff Koseff
Linked Author(s):
Keywords: No Keywords
Abstract: A laser-induced fluorescence (LIF) probe and a laser-Doppler anemometer (LDA) are combined into a single instrument that is capable of directly measuring turbulent scalar fluxes in laboratory flows. The combined LIF/LDA instrument is used to measure profiles of velocities, scalar concentrations, and scalar fluxes in a turbulent boundary layer that develops over a bed of model bivalves. This paper presents the combined LDA/LIF technique together with sample results from experiments over the model bivalves. A problematic phenomenon known as photobleaching which is endemic to LIF measurements is also discussed, and practical remedies to the problem are given.
Year: 1997