Comparison between geometrical model and Debye model for large bubble scattering
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Graphical Abstract
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Abstract
Mie theory is a powerful tool for calculating the scattering properties of spherical bubbles, but it can not give much insight into the physical scattering process (such as reflection, refraction and diffraction) as the geometrical model and Debye model do. Calculation with the geometricaloptics theory or Debyeseries expansion of the Mie amplitude can help us to understand the physical scattering mechanisms. In this paper, the scattering patterns of large spherical bubbles in water are calculated by both geometricaloptics model and the Debye model. A detailed comparison between the geometricaloptics model and Debye model is presented. The analysis result shows that the result from the geometricaloptics approach agrees well with those obtained by Debyemodel for the perpendicular polarized component when the size of the bubbles becomes large enough. However, there is large variance between the two calculations in the scattering region of 45°~90° for the parallel polarized component.
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