Laser Doppler Velocimetry (LDV) is a non-intrusive optical technique used to measure the velocity of fluid flows. It leverages the Doppler effect, which refers to the change in frequency (or wavelength) of light due to the motion of reflective particles within the fluid. ### Key Principles and Components: 1. **Laser Source**: A coherent light source, typically a laser, produces a focused beam of light.
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