Laser Doppler Velocimeter for Measuring Flow-Velocity Fluctuations

1968 ◽  
Vol 11 (2) ◽  
pp. 433 ◽  
Author(s):  
R. D. Lewis
Keyword(s):  
Flow Velocity ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter ◽  
Velocity Fluctuations

Fiber-coupled self-mixing diode-laser Doppler velocimeter: technical aspects and flow velocity profile disturbances in water and blood flows

1994 ◽  
Vol 33 (24) ◽  
pp. 5628 ◽  
Author(s):  
M. H. Koelink ◽  
F. F. M. de Mul ◽  
A. L. Weijers ◽  
J. Greve ◽  
R. Graaff ◽  
...  
Keyword(s):  
Velocity Profile ◽  
Flow Velocity ◽  
Diode Laser ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter ◽  
Technical Aspects ◽  
Blood Flows ◽  
Flow Velocity Profile

The laser-Doppler velocimeter and its application to the measurement of turbulence

1973 ◽  
Vol 60 (2) ◽  
pp. 321-362 ◽  
Author(s):  
William K. George ◽  
John L. Lumley
Keyword(s):  
Power Spectrum ◽  
Laser Doppler ◽  
Turbulent Velocity ◽  
Laser Doppler Velocimeter ◽  
Light Sources ◽  
Mean Velocity ◽  
Velocity Fluctuations ◽  
Theoretical Predictions ◽  
Laminar And Turbulent Flow ◽  
Scattering Volume

In 1964, Yeh & Cummins demonstrated that coherent light sources could be used for the measurement of steady fluid velocities by observing the Doppler shift in the frequency of light scattered from small particles moving with the fluid. Since 1964 many investigators have attempted to extend this technique to the measurement of turbulent velocity fluctuations.A fundamental limitation on this type of velocimeter is the Doppler ambiguity introduced by the finite transit time of particles through the scattering volume, turbulent velocity fluctuations across the scattering volume, mean velocity gradients and electronic noise. A unified account of the effect of the Doppler ambiguity on the measurement of the instantaneous velocities is presented and results are interpreted using the power spectrum. The influence of the ambiguity on the measurement of other statistical quantities is also examined.Limitations on the spatial and temporal resolution imposed by the finite sampling volume are examined using the power spectrum and criteria for optimization of the response are proposed.An operational laser-Doppler velocimeter is described and measurements of spectra in both laminar and turbulent flow are presented. The experimental results are seen to be in excellent agreement with theoretical predictions.

scholarly journals Evaluation of Blood Flow Velocity in the Coronary Artery and Vein by Laser Doppler Velocimeter

1984 ◽  
Vol 4 (1) ◽  
pp. 39-40
Author(s):  
O. HIRAMATSU ◽  
G. TOMONAGA ◽  
K. MITO ◽  
K. TSUJIOKA ◽  
Y. OGASAWARA ◽  
...  
Keyword(s):  
Blood Flow ◽  
Coronary Artery ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter

Evaluation of Blood Flow Velocity Waveforms in Intramyocardial Artery and Vein by Laser Doppler Velocimeter with an Optical Fiber

1988 ◽  
pp. 525-528 ◽  
Author(s):  
Keiichiro Mito ◽  
Yasuo Ogasawara ◽  
Osamu Hiramatsu ◽  
Yoshifumi Wada ◽  
Katsuhiko Tsujioka ◽  
...  
Keyword(s):  
Blood Flow ◽  
Optical Fiber ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter

Characteristics of Long-Period Flow Velocity Fluctuations around Tomakomai Harbor

1999 ◽  
Author(s):  
Hiroya Kinoshita ◽  
Hideki Hoshi ◽  
Youichi Atsumi ◽  
Shin-ichiro Sekiguchi ◽  
Toshihiko Yamashita
Keyword(s):  
Flow Velocity ◽  
Velocity Fluctuations ◽  
Long Period
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