Particle Streak Velocimetry for Room Air Flow - Some Improvements

In this study Particle Streak Velocimetry, PSV, was used to record instantaneous two-dimensional velocities with the help of digital images of streaks created by small water-density particles suspended in the water. This whole-field measuring technique has been improved by substituting the standard chopper technique by a computer-controlled shutter to get a better result in the evaluation process and criteria control for streaks. The vector flow map (direction, speed and position) was also calculated with the help of digital image processing. Some different interpolation techniques have been explored and the effects on the vector flow map from added boundary conditions.