Torsion estimation of particle paths through porous media observed by in-situ time-resolved microtomography.
Fiche publication
Date publication
février 2017
Journal
Journal of microscopy
Auteurs
Membres identifiés du Cancéropôle Est :
Pr DAUL Christian
Tous les auteurs :
Blankenburg C, Rack A, Daul C, Ohser J
Lien Pubmed
Résumé
The torsion distribution of cell paths in two-phase flow of a cell suspension through a porous medium is an important quantity for chromatographic processes. It can be estimated from cell tracking in sequences of three-dimensional images of a suspension pumped through the medium, where the images are acquired by in-situ time-resolved microtomography using synchrotron radiation and inline phase contrast modus. This contribution presents a new method for estimating path torsion from discrete positions, where the estimation is based on an appropriate discretization of the differential-geometric formula of the torsion of a space curve. Investigations performed for an alcoholic suspension of silica gel particles pumped through a partially open polyurethane foam show that the shape of the inner surface of the foam has a considerable impact on the particle paths. It turns out that the variance of the torsion for slow particle moving close to the surface is a half order of magnitude smaller than that of fast particles, which underlines the importance of torsion for filter efficiency.
Mots clés
3D image processing, Chromatography, X-ray phase contrast, synchrotron radiation, two-phase flow
Référence
J Microsc. 2017 Feb;: