The effects of air bubbles on ultrasound velocity measurements

2006 ◽  
Vol 41 (4) ◽  
pp. 593-602 ◽  
Author(s):  
Sandro Longo
Keyword(s):  
Ultrasound Velocity ◽  
Air Bubbles ◽  
Velocity Measurements

Compressibility of nano inclusions in complex fluids by ultrasound velocity measurements

2003 ◽  
Vol 50 (11) ◽  
pp. 1595-1600 ◽  
Author(s):  
J.-Y. Le Huerou ◽  
M. Gindre ◽  
A. Amararene ◽  
W. Urbach ◽  
M. Waks
Keyword(s):  
Complex Fluids ◽  
Ultrasound Velocity ◽  
Velocity Measurements

scholarly journals Magnetic phase diagram ofBa3CoSb2O9as determined by ultrasound velocity measurements

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
G. Quirion ◽  
M. Lapointe-Major ◽  
M. Poirier ◽  
J. A. Quilliam ◽  
Z. L. Dun ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Ultrasound Velocity ◽  
Velocity Measurements

scholarly journals Carotid Duplex Ultrasound Velocity Measurements Versus Intravascular Ultrasound in Detecting Carotid In-Stent Restenosis

2009 ◽  
Vol 2 (5) ◽  
pp. 438-443 ◽  
Author(s):  
Bryan P. Yan ◽  
David J. Clark ◽  
Michael R. Jaff ◽  
Thomas J. Kiernan ◽  
Robert M. Schainfeld ◽  
...  
Keyword(s):  
Intravascular Ultrasound ◽  
Duplex Ultrasound ◽  
Ultrasound Velocity ◽  
Velocity Measurements ◽  
Stent Restenosis ◽  
Carotid Duplex ◽  
In Stent Restenosis

Measurement in the Wake Region of Two Bubbles in Close Proximity by Combined Shadow-Image and PIV Techniques

1999 ◽  
Vol 121 (1) ◽  
pp. 191-197 ◽  
Author(s):  
A. Tokuhiro ◽  
A. Fujiwara ◽  
K. Hishida ◽  
M. Maeda
Keyword(s):  
Ccd Camera ◽  
Shadow Image ◽  
Wake Flow ◽  
Air Bubbles ◽  
Velocity Measurements ◽  
Square Channel ◽  
Image Velocimetry ◽  
Close Proximity ◽  
Spatio Temporal ◽  
Two Bubbles

An experimental study on flow around two similarly-sized, adjacent air bubbles confined in a 1000 mm vertical, square channel (100 × 100 mm2) with downward flow of water was conducted. The bubbles were D = 11.7 mm in major diameter, ellipsoidal in shape (0.4 ml volume) and 12 mm apart. The Reynolds and Eo¨tvo¨s numbers were 1950 < ReD < 2250, 11 < Eo < 11.5 such that the bubbles oscillated. Velocity measurements were taken using Digital Particle Image Velocimetry, Complemented by Laser Induced Fluorescence. Simultaneously, a second CCD camera recorded the shadow image of the bubble pair’s motions. Visualization revealed that the bubbles move out of phase and do not collide nor coalesce. The velocity data revealed the dynamic interaction of two wake-flow velocity fields with a jet-like flow in-between. From the DPIV data, estimates of the vorticity, Reynolds-stress and turbulent kinetic energy (TKE) distributions confirmed the spatio-temporal nature of the flow. Details will be presented.

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