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Updated: Jul 9, 2026

High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
Soot-velocity measurements by particle vaporization velocimetry
J M Seitzman1, R T Wainner, P Yang
1School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0150, USA.
Abstract:
We demonstrate a new imaging technique for velocity measurements in particle-laden flows. The technique, particle vaporization velocimetry, is a form of flow tagging based on laser vaporization of absorbing particles at defined locations in the flow. The locations of these tagged regions are then interrogated after a known delay to determine the convective velocity. Results are presented for vaporization of carbonaceous (soot) particles in a nonreacting gas jet and a hydrocarbon flame, with interrogation provided by either elastic scattering or laser-induced incandescence from the soot. The long lifetime of the tagged soot regions (>2 ms) allows measurements to be made over a wide range of velocities.
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