Multi-scale agglomerates: relationship between morphology and optical properties.Report as inadecuate

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* Corresponding author 1 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires 2 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels 3 GENERIC-ENSMSE - Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation 4 CIS-ENSMSE - Centre Ingénierie et Santé 5 IFRESIS-ENSMSE - Institut Fédératif de Recherche en Sciences et Ingénierie de la Santé 6 DIM-ENSMSE - Département Imagerie et Morphologie 7 LGF-ENSMSE - UMR 5307 - Laboratoire Georges Friedel

Abstract : Multi-scale solid particle aggregates designate aggregates of clusters, which are composed of smaller clusters, themselves composed by aggregated solid particles. There are usually 3 or 4 relevant scale levels of agglomeration. The final aim of this study is to define the relationships between the geometrical and optical characteristics of different aggregates. Indeed, a previous work of Gruy and Jacquier in 2008 1 and 2 showed the existence of a narrow link between these two aggregate characterizations. The first step consists in modeling multi-scale aggregates with specific geometrical shape and optical properties. Thereafter, the aggregate characterization is performed. Following the Xu theory called GMM Generalized Multiparticle Mie solution exposed in his paper 3, the studied optical parameter is the scattering cross section, denoted, Csca in µm2. In addition, the optical analysis is focused on aggregates with a high optical index. Concerning the geometrical characterization, several parameters are studied: the compactness, the number of the primary particles and the volume of the aggregates, successively. Using different 2D joint geometrical-optical representations, the correlation between the Csca values and the geometry of the aggregate is analyzed.

keyword : Multi-scale aggregates geometrical characterization optical characterization Generalized Multiparticle Mie solution GMM

Author: Marthe Lagarrigue - Sandra Jacquier - Johan Debayle - Jean-Charles Pinoli - Frédéric Gruy -



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