Abstract
Laser-Doppler anemometry is a technique that has evolved over the past fifteen years as a powerful tool for measuring velocity fields in various research and industrial applications. Traditional techniques for measuring the transport characteristics of fluids in a fibrous assembly do not unfortufiately provide quantitative information about the actual dynamic transport processes occurring within the fibrous assembly. A laser-Doppler anemometer system that can provide such quantitative dynamic transport information is described. The fundamental fluid dynamic information ob tained with a laser-Doppler anemometer system should enhance our knowledge about the flow of fluids in fibrous assemblies. Such information is virtually nonexistent in the literature.
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