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Pré-Publication, Document De Travail Année : 2024

Numerical Simulation of Polarized Light and Temperature with a Refractive Interface

Simulation numérique d'une onde électromagnetique polarisée multi haute fréquence et de la température associée dans un milieu à indice de réfraction variable et discontinu

Olivier Pironneau
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Résumé

In this article we propose a numerical algorithm to compute the intensity and polarization of a multichromatic electromagnetic radiation crossing a medium with non constant refractive index and modeled by the Vector Radiative Refractive Transfer Equations (VRRTE). Special attention is given to the case where the refractive index has a discontinuity for which the Fresnel conditions are necessary. We assume that the only spatial variable of interest is the altitude (stratified medium). An algorithm based on iterations of the sources is shown to be monotone and convergent. Numerical examples are given with highly varying absorption coefficient $\kappa$ and Rayleigh scattering as in the Earth atmosphere. To study the effect of CO2 in the atmosphere $\kappa$ is changed in the frequency ranges where CO2 is absorbing.
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Dates et versions

hal-04610801 , version 1 (13-06-2024)
hal-04610801 , version 2 (29-06-2024)

Identifiants

  • HAL Id : hal-04610801 , version 2

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Olivier Pironneau. Numerical Simulation of Polarized Light and Temperature with a Refractive Interface. 2024. ⟨hal-04610801v2⟩
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