Quality fluid mechanics solutions from Dutco Tennant LLC are appreciated around the world. In this segment, we provide Particle Image Velocimetry which is a non-intrusive laser optical method used for determining velocity distribution in fluids. The PIV system may be of different complexity, and depending on the application type it may vary widely, but then the basic principle of PIV remains the same.
In order to let the Particle Image Velocimetry (PIV) work, the fluid mechanics system is planted with light scattering particles, which are believed to follow the flow dynamics. For the instrument to work, the flow has to be illuminated by a concentrated light source, which could be a laser, and there is a special camera which acquires the reflected light from tiny particles present in the flow. The camera in the equipment takes two successive images which are matched with the two light pulses. The light pulse produced by the product is very short so that even a single particle may be recognized in the images without haziness. Software which does cross-correlation then measures the particles’ displacement between the first and second image. Since the time lapse between the two light pulses is known, you can calculate the velocity field.