Characterization of vortices using pulsed-wave Doppler ultrasound

Abstract The detection and characterization of vortices from a Kaman vortex generator by means of a 20 MHz pulsed-wave Doppler ultrasound system were assessed. Measurements were made at different steady flowrates in a 10 mm internal diameter polyurethane tube, 14 mm distal to a circular cylinder of...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine Journal of engineering in medicine, 2000-01, Vol.214 (6), p.677-684
Main Authors: Gaupp, S, Wang, Y, How, T V, Fish, P J
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biomechanical Phenomena
Blood Flow Velocity
Blood Vessel Prosthesis
Blood vessels
Investigative techniques, diagnostic techniques (general aspects)
Laser applications
Medical sciences
Miscellaneous. Technology
Models, Cardiovascular
Prosthesis Failure
Pulsatile Flow
Rheology
Signal Processing, Computer-Assisted
Ultrasonic applications
Ultrasonic investigative techniques
Ultrasonography, Doppler - methods
Viscosity
Vortex flow
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Summary:Abstract The detection and characterization of vortices from a Kaman vortex generator by means of a 20 MHz pulsed-wave Doppler ultrasound system were assessed. Measurements were made at different steady flowrates in a 10 mm internal diameter polyurethane tube, 14 mm distal to a circular cylinder of diameter 2 mm, placed across the tube inlet. The results were compared with those obtained with a two-component laser Doppler anemometer system. There was generally good agreement between the two techniques in the measurement of convective flow velocity, frequency of vortex shedding and the circulation velocity of the vortices. It is concluded that pulsed-wave Doppler ultrasound is a suitable technique for investigating vortical flow structures.
ISSN:0954-4119
2041-3033
DOI:10.1243/0954411001535705