High-speed two color scanning VLIF

A novel two-color scanning volumetric laser induced fluorescence imaging technique (VLIF) for fluid dynamics is presented. The scanning VLIF imaging system allows for a flexible trade off between speed and resolution with throughput of over 17 gigavoxels per second. To demonstrate the capabilities of our technique, we characterize the flow past a sphere for a range of Reynolds numbers. The two-color technique allows us to simultaneously track a passive dye and fluorescently labelled tracer particles. The latter allows us to reconstruct the velocity field using a scanning particle tracking velocimetry technique.