Laser anemometry
Abstract
Particle size distributions and local flow velocity can be determined with the aid of laser anemometry. Using the Doppler effect, the particle velocity can be measured on the basis of light scattering processes. Details concerning the Doppler effect are discussed and a description is presented of aspects of optical mixing spectroscopy. A useful but nonrigorous approach for analyzing the Doppler heterodyne arrangement is provided by the so-called 'fringe model'. Recent applications of a laser anemometer involving an in-vivo measurement of the velocity of blood flow are considered. Attention is also given to practical difficulties associated with the employment of laser anemometers.
- Publication:
-
American Scientist
- Pub Date:
- June 1977
- Bibcode:
- 1977AmSci..65..289W
- Keywords:
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- Flow Velocity;
- Laser Anemometers;
- Particle Size Distribution;
- Size Determination;
- Velocity Measurement;
- Blood Flow;
- Laser Doppler Velocimeters;
- Instrumentation and Photography