Modeling radiation characteristics of semitransparent media containing bubbles or particles

Jaona Randrianalisoa, Dominique Baillis, Laurent Pilon
2006 Optical Society of America. Journal A: Optics, Image Science, and Vision  
Modeling of radiation characteristics of semitransparent media containing particles or bubbles in the independent scattering limit is examined. The existing radiative properties models of a single particle in an absorbing medium using the approaches based on (1) the classical Mie theory neglecting absorption by the matrix, (2) the far field approximation, and (3) the near field approximation are reviewed. Comparison between models and experimental measurements are carried out not only for the
more » ... not only for the radiation characteristics but also for hemispherical transmittance and reflectance of porous fused quartz. Large differences are found among the three models predicting the bubble radiative properties when the matrix is strongly absorbing and/or the bubbles are optically large. However, these disagreements are masked by the matrix absorption during eScholarship provides open access, scholarly publishing services to the University of California and delivers a dynamic research platform to scholars worldwide. calculation of radiation characteristics of the participating medium. It is shown that all three approaches can be used for radiative transfer calculations in an absorbing matrix containing bubbles. This study focuses on modeling of radiation characteristics of semitransparent media containing particles or bubbles in the independent scattering limit. The existing radiative properties models of a single particle in an absorbing medium using the approaches based on (1) the classical Mie theory neglecting absorption by the matrix, (2) the far field, and (3) the near field approximations are reviewed. Comparison between models and experimental measurements are carried out not only for the radiation characteristics but also for hemispherical transmittance and reflectance of porous fused quartz. Large differences are found between the three models predicting the bubble radiative properties when the matrix is strongly absorbing and/or the bubbles are optically large. However, these disagreements are masked by the matrix absorption during calculation of radiation characteristics of the participating medium. It is shown that all three approaches can be used for radiative transfer calculations in absorbing matrix containing bubbles.
doi:10.1364/josaa.23.001645 pmid:16783428 fatcat:3zys7hztp5alxm7gxsnnikeo7u