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Bubble sizing with high spatial resolution.

D Cathignol1, J Y Chapelon, V L Newhouse

  • 1Inst. Nat. de la Sante et de la Recherche Med., Lyon.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1990
PubMed
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This study presents a novel ultrasonic technique for accurately sizing and locating bubbles. The method achieves high precision comparable to existing methods, with negligible nonlinear effects.

Area of Science:

  • Acoustics
  • Fluid Dynamics
  • Ultrasonic Measurement

Background:

  • Accurate bubble sizing and localization are crucial in various scientific and industrial applications.
  • Existing methods like double-frequency and pulsed Doppler velocimetry have limitations in accuracy or resolution.

Purpose of the Study:

  • To develop and validate a new ultrasonic technique for simultaneous bubble sizing and localization.
  • To compare the performance of the proposed method with established techniques.

Main Methods:

  • Insonification of bubbles using high-frequency pulsed ultrasound and a low-frequency pumping field.
  • Signal processing modifications to a conventional Doppler flowmeter to detect maximum amplitude at bubble resonance.
  • Comparison of resonance frequencies obtained with the new method and the double Doppler frequency method.

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Main Results:

  • The proposed technique achieves bubble sizing accuracy similar to the double-frequency method.
  • Range resolution is comparable to pulsed Doppler velocimeters.
  • Negligible nonlinear effects were observed, simplifying analysis.

Conclusions:

  • The modified Doppler flowmeter effectively sizes and locates bubbles with high accuracy and resolution.
  • The technique offers practical improvements for ease of use.
  • The method is validated through measurements of various bubble sizes.