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Particle Image Velocimetry

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Particle Image Velocimetry

Description: A technique used to study the flow of fluids

Recommended Product: Quantel Twins

PIV is an application used widely in the field of fluid dynamics. It enables complex flow patterns to be studied in both liquids and gases.

Firstly the flow medium is seeded with particles. This is then illuminated with two light-sheets generated by a pair of pulsed Nd:YAG lasers (such as the Quantel Brilliant Twins). By using a pair of lasers the time interval, Dt, between pulses is precisely controlled. A CCD camera mounted at right angles to the light sheet records the positions of the particles at the first pulse in one frame and the subsequent particle positions at the second pulse in the second frame. Anaylsis of these two images enables a velocity flow map to be constructed as represented below:

Lambda Photometrics has installed several Quantel Brilliant Twins systems at The University of Nottingham. Shown below is the Quantel Brilliant B on the MMME test bed.