ILLUMINATING LASER - CW/PULSED

Particle Image Velocimetry (PIV) is a whole-flow-field technique providing instantaneous velocity vector measurements in a cross-section of a flow. This technique being a non-intrusive one, allows the application of PIV in high speed flows, boundary layer studies of fluids.

ILLUMINATING LASER - CW/PULSED

Postby arunraje on Thu Jun 26, 2008 11:45 am

Illuminating laser
PIV can be accomplished using continuous wave (CW)
lasers or, more optimally, pulsed lasers. Typical CW lasers
used for PIV are argon-ion lasers producing in the range
of a few watts; for some less demanding applications,
even low-powered helium-neon lasers might suffice.
Typical pulsed lasers are frequency-doubled Nd : YAG
(neodymium : yttrium aluminum garnet) lasers producing
0.1 to 0.3 joules/pulse, at a repetition rate of tens of Hz.


http://www.ias.ac.in/currsci/jul102000/ ... rticle.pdf
arunraje
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