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Convergence of the DDA for ensembles of objects of irregular shape

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Title
Convergence of the DDA for ensembles of objects of irregular shape
Author(s)
Evgenij Zubko; Kochergin, Anton; Videen, Gorden
Publication Date
2024-02
Journal
Journal of Quantitative Spectroscopy and Radiative Transfer, v.314
Publisher
Pergamon Press Ltd.
Abstract
The discrete dipole approximation (DDA) is commonly used to compute light-scattering properties of irregularly shaped particles. The DDA maps the particle into an array of cubic cells with side d < λ. For a randomly oriented irregularly shaped particle, DDA has been shown accurate when kd|m| ≤ 1, where k is the wavenumber and m is the particle refractive index. We demonstrate that the DDA yields robust results even when kd|m| ≈ 1.2 when applied to ensembles of irregularly shaped dielectric particles and kd|m| ≈ 1.3 for conductive particles. This finding can greatly reduce the computational load required for performing such computations. © 2023 Elsevier Ltd
URI
https://pr.ibs.re.kr/handle/8788114/14967
DOI
10.1016/j.jqsrt.2023.108854
ISSN
0022-4073
Appears in Collections:
Pioneer Research Center for Climate and Earth Science(기후 및 지구과학 연구단) > Planetary Atmospheres Group(행성 대기 그룹) > 1. Journal Papers (저널논문)
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