CONCENTRATION AND VELOCITY-FIELD MEASUREMENTS IN TURBULENT FLOWS USING LASER-INDUCED FLUORESCENCE TOMOGRAPHY (LIFT)

Laser-Induced Fluorescence is used to tomographically produce volume i nformation of concentration distribution in a turbulent shear flow. Ba sed on Adaptive Least Squares Correlation (ALSC) of grey level distrib utions in small patches cut out of consecutive tomographically constru cted observation volumes, 3-D fields of velocity, vorticity and rate-o f-strain are determined with high spatial resolution, satisfactory tem poral resolution and high accuracy. This novel technique opens new per spectives for the study of mixing processes.