Laser Doppler Velocimetry (LDV) is an optical measurement technique used to determine the velocity of fluid flow by analyzing the frequency shift of laser light scattered by moving particles in the fluid. This non-intrusive method relies on the Doppler effect, where the frequency of light changes based on the relative motion of the particles and the laser source. LDV is particularly valuable in studying particle-laden flows because it allows for precise measurements of velocity profiles without disturbing the flow itself.
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