1. Radiative transfer with reciprocal transactions: Numerical method and its implementation
- Author
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Karri Muinonen, Antti Penttilä, Johannes Markkanen, Timo Väisänen, Particle Physics and Astrophysics, Planetary-system research, and Department of Physics
- Subjects
Albedo ,Atmospheric Science ,Light ,010504 meteorology & atmospheric sciences ,Monte Carlo method ,Astronomical Sciences ,Optical Analysis ,01 natural sciences ,Light scattering ,T-MATRIX ,Scattering ,Electricity ,Radiative transfer ,Scattering, Radiation ,Statistical physics ,EQUATIONS ,010303 astronomy & astrophysics ,Climatology ,Physics ,Multidisciplinary ,Refractive Index ,Planetary Sciences ,Applied Mathematics ,Simulation and Modeling ,Electromagnetic Radiation ,Software Engineering ,EM WAVES ,SPHERES ,Mie Scattering ,Electric Field ,Physical Sciences ,MULTIPLE-SCATTERING ,Engineering and Technology ,Medicine ,DISCRETE RANDOM-MEDIA ,Electromagnetic Phenomena ,Algorithms ,Reciprocal ,Research Article ,Computer and Information Sciences ,Mie scattering ,Science ,Electromagnetic Scattering ,Research and Analysis Methods ,114 Physical sciences ,Superposition principle ,0103 physical sciences ,Computer Simulation ,Chemical Characterization ,0105 earth and related environmental sciences ,Numerical analysis ,Light Scattering ,Source Code ,Earth Sciences ,Focus (optics) ,Mathematics - Abstract
We present a numerical method for solving electromagnetic scattering by dense discrete random media entitled radiative transfer with reciprocal transactions ((RT2)-T-2). The (RT2)-T-2 is a combination of the Monte Carlo radiative-transfer, coherent-backscattering, and superposition T-matrix methods. The applicability of the radiative transfer is extended to dense random media by incorporating incoherent volume elements containing multiple particles. We analyze the (RT2)-T-2 by comparing the results with the asymptotically exact superposition T-matrix method, and show that the (RT2)-T-2 removes the caveats of radiative-transfer methods by comparing it to the RT-CB. We study various implementation choices that result in an accurate and efficient numerical algorithm. In particular, we focus on the properties of the incoherent volume elements and their effects on the final solution.
- Published
- 2019