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Proceedings Paper

Mapping of velocity flow fields using the laser-two-focus technique
Author(s): Helmut Selbach
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Paper Abstract

The role in flow research of the Laser-2-Focus velocimeter, also known as the Laser Transit Velocimeter, is discussed. This technique measures the time of flight of small tracer particles as they cross an optical gate formed by two highly focused laser beams. It is applicable to study laminar flows in different directions. The physical properties of the technique are outlined and compared to those of the laser Doppler technique. The relation between measurement time and turbulence intensity is estimated and solutions are proposed that make the L2F technique suitable for measurements in flows of higher turbulence intensities.

Paper Details

Date Published: 1 November 1990
PDF: 9 pages
Proc. SPIE 1404, ICALEO '89: Optical Methods in Flow and Particle Diagnostics, (1 November 1990); doi: 10.1117/12.34952
Show Author Affiliations
Helmut Selbach, Polytec Gmbh (Germany)

Published in SPIE Proceedings Vol. 1404:
ICALEO '89: Optical Methods in Flow and Particle Diagnostics
Marshall B. Long, Editor(s)

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