Laser Doppler Anemometry

Laser Doppler Anemometry (LDA) is a technique used to measure the speed and direction of fluid flow, such as air or water. It works by shining a laser beam into the flow and detecting how the light is scattered by tiny particles within it. When the particles move, they change the light's frequency slightly, a phenomenon known as the Doppler effect. By analyzing these changes in frequency, scientists can accurately determine the velocity of the flow. LDA is valuable in various fields, including engineering, meteorology, and medical research, for studying fluid dynamics in a non-intrusive way.