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Ultrasonic scattering by two concentric cylinders.

J Sinai1, R C Waag

  • 1Department of Electrical Engineering, University of Rochester, New York 14627.

The Journal of the Acoustical Society of America
|May 1, 1988
PubMed
Summary
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This study analyzes acoustic scattering from two fluid cylinders, revealing how changes in their speed and density affect scattered pressure. The findings are crucial for understanding wave propagation in complex fluid systems.

Area of Science:

  • Acoustics
  • Fluid Dynamics
  • Wave Propagation

Background:

  • Acoustic scattering phenomena are critical in various fields, including medical imaging and non-destructive testing.
  • Understanding wave interaction with complex geometries like concentric cylinders is essential for accurate modeling.

Purpose of the Study:

  • To compute scattered pressure from two concentric fluid cylinders with varying speeds and densities.
  • To investigate the impact of altered material parameters on acoustic scattering patterns.

Main Methods:

  • Employed a series solution for acoustic scattering analysis.
  • Calculated scattered pressure for a range of frequencies (10 kHz to 10 MHz) and material parameters.
  • Systematically varied the speed and density of the inner and outer cylinders.

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Main Results:

  • Demonstrated the influence of cylinder speed and density on scattered pressure.
  • Quantified scattering changes for different frequency ranges and cylinder properties (ka values).
  • Observed distinct scattering behaviors when outer cylinder speed was increased tenfold or its density was elevated.

Conclusions:

  • The study provides a computational framework for analyzing acoustic scattering from multi-layered fluid cylinders.
  • Results highlight the sensitivity of scattered pressure to variations in fluid cylinder speed and density.
  • This research contributes to the fundamental understanding of acoustic wave interactions with dynamic fluid interfaces.