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Expanding Applications in Particle Image Velocimetry (PIV)



Particle Image Velocimetry (PIV) is a long-standing and versatile technique for measuring flow across fields. This optical technique, frequently used in education and research, measures the velocity field of a region within the flow simultaneously. Light scattering particles are added while a laser beam formed into a light sheet illuminates the particles. PIV can provide a quantitative map that gives a more detailed physical explanation of particles in motion.


PIV is used to evaluate an entire plane, by detecting the local velocity of a small area of motion, by statistical means, not the specific velocity of single tracer particles. PTV, or Particle Tracking Velocity, on the other hand, is used to resolve individual particles in two consecutive frames and is better suited for areas with large velocity gradients.


In the past decade, PIV has carved out a niche for itself in laboratory and field research in a variety of fields. Most recently it has been used to study the flow of objects as diverse as: