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Geometric bias and time coincidence in 3-dimensional laser Doppler velocimeter systems (1989)

Brown, J. L.

Springer

Experiments in fluids 7 (1989), S. 25-32

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ISSN: 1432-1114

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract The measurement by a 3-d laser Doppler velocimeter of a turbulent flow has been numerically simulated. Errors associated with the probe volume geometry and the coincidence time window concept are revealed. One type of error occurs for high system data rates when multiple particles lead to system realizations. Another error occurs associated with a geometric bias discovered in the present study. This 3-d Idv geometric bias exists even for single-particle realizations and regardless of the system data rate. A technique for the elimination of the geometric bias is presented.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00226593

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